http://www.turboxs.com/_images/STI/sti447ftlbs426whp.jpg

Modifications:
TurboXS UTEC
TurboXS TBE (2.5 inch old school version)
TurboXS HPMBC
TurboXS Intake
Perrin modified injectors
FP Green
Walbro fuel pump

The lowest line is a stock STI. The middle (dotted red) line is the green on 21psi and pump gas. The highest line is at 28psi (falling to 23.8 at redline) on C16. The car would make more but the clutch won't take it. During this run the car kind of skipped a little on the dyno. I assumed it was the dyno acting a little funny, but it turns out it was the first signs that our clutch was on the way out. For the next run we cooled the car back down and turned up the boost to 29psi. The clutch completely let go as the boost hit 29psi. I haven’t driven the car on the road yet, but I don’t expect the clutch to hold in the higher gears. We need to get a replacement out here so we can take this thing to the track.

-Nathan
ps, no coils were harmed during this test ;)

Nice :cool:

How are you getting it to hold power to redline like that?

wow

:eek: :eek: congrats on those numbers.... That's some MASSIVE boost!:eek: :eek:

With a good clutch, how driveable do you think the car will be? I have the feeling that there will be some creazy wheelspin in the first 2 gears at least with that setup on C16:eek:

frontmount?

Awesome numbers nonetheless!!! you up for Cecil this weekend? Michael and I are trying once again...

def

Originally posted by dug-e-fresh
frontmount?

Awesome numbers nonetheless!!! you up for Cecil this weekend? Michael and I are trying once again...

def



Stock TMIC

If the clutch will hold on the street I may be up for it...


-Nathan
www.turboxs.com

Originally posted by nmyeti
Stock TMIC

If the clutch will hold on the street I may be up for it...


-Nathan
www.turboxs.com

wow! saw the intake, and thought maybe frontmount... it would be sweet if you could make it.

i think it would hold ;) I ran my best stock turbo time on a slipping clutch... a heck of a lot less power... he he he... but gotta try ;)

def

Originally posted by TypeC
Nice :cool:

How are you getting it to hold power to redline like that?


On pump gas it is holding power because the turbo is not really being pushed. We call this the "BFT" syndrome. On race fuel it's dropping down to 400whp at redline. At high boost where we are pushing the turbo, it starts to drop off quite a bit more.

Can someone post up hp and tq numbers on stock sti, green + pump, green + c16--sorry can't read the screen and my printer's on the fritz. thnx. Awesome work guys!

Nathan,

I just sent you a PM. It's Utec related. Congrats on your numbers! :eek: I still have the old video of your night-time run of 12.4. Would be nice to see another video but this time in the 11s. ;)

Originally posted by dug-e-fresh
wow! saw the intake, and thought maybe frontmount... it would be sweet if you could make it.
def


If you take a look at the stock top mount it actually is a pretty big core. Didn't think it would be good for over 400, but here's the proof.

Now get to work on the Foreser XT mods! :)

Great #'s what are the chances of you coming up friday so I can get a good look at your tail lights ?:lol:

Originally posted by odin1
Can someone post up hp and tq numbers on stock sti, green + pump, green + c16--sorry can't read the screen and my printer's on the fritz. thnx. Awesome work guys!


Stock
251ft/lbs 269hp

Pump
340ft/lbs 353HP

Race
437.6 ft/lbs 426.9HP

Originally posted by nmyeti
Stock
251ft/lbs 269hp

Pump
340ft/lbs 353HP

Race
437.6 ft/lbs 426.9HP

Wow! thnx much

Nice Nathan - also, what kind of times is your other car putting down? Maybe you can get them both staged side by side and let them rip...

I'm confused -

Torque at 5250 ~390 lbft
Power at 5250 ~ 415 hp

How can that be? Surely at 5252rpm hp = lbft numerically.

<pedantic>
Also torque is measured in lbft as in lb*ft, ft/lb makes no sense.
</pedantic>

I was there ... pretty amazing to watch and boy does that RFL sound sooo good on the STi.. i thought it sounded good on a WRX, the STI is that much better.. sooo tempting

The thing is most defintly a monster.

The car gained 186 awTRQ
and
157 AWHP

Just from a few simple mods... wow...

:huh: :banana: :devil: :disco:

Originally posted by duncangrant
I'm confused -

Torque at 5250 ~390 lbft
Power at 5250 ~ 415 hp

How can that be? Surely at 5252rpm hp = lbft numerically.

<pedantic>
Also torque is measured in lbft as in lb*ft, ft/lb makes no sense.
</pedantic>

The HP is SAE corrected, the torque is not. You are of course correct that it is LB*ft. My use of Ft/lbs (which matches what our dyno says) is incorrect and comes from the term foot-lbs.

-Nathan
www.turboxs.com

Originally posted by nmyeti

ps, no coils were harmed during this test ;)

Imagine that:lol:

Well I drove the car on the street and it is damn fast, but the clutch is just overpowered when peak torque comes on in any of the upper gears. It is also bad anytime you shift the car hard. It looks like we'll need a replacement before this thing makes a trip down the strip.

I hate TurboXS.....

they make me feel so small.....:alien:

What I like about it is the is no loss of hp or trq on the bottom end. Pretty amazing.. Hooray for AVCS, 2.5 and Mitsu hot sides.

C

Originally posted by AZScoobie
What I like about it is the is no loss of hp or trq on the bottom end. Pretty amazing.. Hooray for AVCS, 2.5 and Mitsu hot sides.

C

Interesting enough it turns out to be a good setup for a 2.5 even though it was designed for a 2.0. ;)


Jermaine@turboxs.com
www.turboxs.com

Originally posted by nmyeti
On pump gas it is holding power because the turbo is not really being pushed. We call this the "BFT" syndrome. On race fuel it's dropping down to 400whp at redline. At high boost where we are pushing the turbo, it starts to drop off quite a bit more.

No, I was saying 400whp at redline with a 430whp peak is not dropping off IMO. That is awesome.

Do you have plans of testing a Red on that car?

Originally posted by TypeC


Do you have plans of testing a Red on that car?

No, i have no plans of testing the red on this car. I feel anything larger should be run with an external gate. If we decide on something larger, it will require a different up-pipe and down-pipe.

-Nathan
www.turboxs.com

Great #'s !
Nathan
Are you still coming to NM this summer ?
Adam

Originally posted by adamrmr
Great #'s !
Nathan
Are you still coming to NM this summer ?
Adam

I plan on it, I just don't have an exact date yet.

Good job TXS. are you gonna make stage kits for the STI like you did for the wrx? Are you guys still doing innercoolers i heard you were dumping hyperflows set ups why is that? BTW nice job on the tbe for the evo its great.

Originally posted by Basic
Good job TXS. are you gonna make stage kits for the STI like you did for the wrx? Are you guys still doing innercoolers i heard you were dumping hyperflows set ups why is that?

1. We will do staged packages. When will we get beyond the maps we currently have? I don't know.

2. We are building our own intercoolers. Our relationship with Hyperflow was one we both profited from and they make a nice kit. Our split was mostly business related.

-Nathan
www.turboxs.com

Wow all that power on pretty much stock sti.. i'm f'ing impressed!! :banana:

2. We are building our own intercoolers.
When will they be out? and are you gonna make 1 for the evo?

I had your stage 4 kit with hyper flow FMICon my wrx it was great the only thing i didnt get was the cat back i had the Greddy evo and it is crap in comparison to TXS Exaust it has thin weak flangs. ONLY bad thing about your kits is i think it spoiled my mech Pat at J.A. Performance in york now he says wait till TXS comes out with stuff for your EVO. If there is even a hint you guys are making a part im looking at he wont let me order it untill you guys get yours out haha. im doing full internals now cause i waiting to see if you come out with evo stage kits.

amazing results, love the torque number.

Congrats Nathan! Extremely jealous that you went with the Green instead of the 20g like I did. And I totally should have had you do a race gas tune on mine as well. Very jealous, extreme congratulations!

doug
let me know when you are going to cecil, my utec and injectors arrived today and i should have it dialed in by friday.

andy

Nathan & Turbo XS, congrats on an aweseome job...

you make me get VERY excited thinking about the day my project is done...

I, too, have been waiting to see these results. Thanks and grats to Nathan and crew!

So much for the Evo's being superior for getting big power from a few mods. :devil:

Originally posted by nmyeti
Stock
251ft/lbs 269hp

Pump
340ft/lbs 353HP

Race
437.6 ft/lbs 426.9HP

Nice numbers.

I'm wondering what water injection will do with pump gas?

Awsome numbers... Looks like it would drive just like stock till the boost kicks in....

Originally posted by nmyeti
Stock TMIC
Dear Nathan -

You are silly.

Sincerely,
8

:huh:

So is that now the new TMIC record. Damn, that's alot of torque. Nice.:D

Originally posted by 8Complex
Dear Nathan -

You are silly.

Sincerely,
8

:huh:



I've been called worse things on these boards :D

Originally posted by Soon2Bgreat
So is that now the new TMIC record. Damn, that's alot of torque. Nice.:D
Yep it is the new record. It is also the first car that has felt fast after driving yours.

Nathan- didn't u guys max out the stock maf? I've been told to use Perrin's big maf with my combo-help please.

Originally posted by SinistiR
doug
let me know when you are going to cecil, my utec and injectors arrived today and i should have it dialed in by friday.

andy

sure thing,.. I'll pm you when I know for sure.

def

Originally posted by odin1
Nathan- didn't u guys max out the stock maf? I've been told to use Perrin's big maf with my combo-help please.

We have the MAF mapped to just over 4.9v with the UTEC. I don't know the actual voltages but they were not 4.9v.

-Nathan
www.turboxs.com

warning.. n00b question...

what exactly IS c16? I understand its a race fuel, but how high of an octane rating is it? What's the difference between that and say, Turbo blue?

Don

http://www.vpracingfuels.com/vp_01_fuels.htmlOriginally posted by wistful
warning.. n00b question...

what exactly IS c16? I understand its a race fuel, but how high of an octane rating is it? What's the difference between that and say, Turbo blue?

Don

The link master posts! :D J/K, I would have done that too.

In short, c16 is really nice leaded gas. It has a MON (typically the lower rating, and more indicative of performance in the engine) of 117. You can run at least 5 more pounds of boost than 100 octane with the right turbo, and probably 4-5 more degrees of timing. With a real turbo, you can probably make in the vicinity of 70-100 more at the wheels with c16. Even with a vf34 or something, it's close to that if you want to get crazy. It'll cost you around $8/gallon these days.

-Sean

Nathan,

I sent you an email asking you a question about fitting the Utec on another car. Did you get it?

Originally posted by Kevin Thomas
Nathan,

I sent you an email asking you a question about fitting the Utec on another car. Did you get it?

Send it again directly to Nathan@turboxs.com. I have a hard time getting email though the board.

-Nathan
www.turboxs.com

Nice, that's some power man. I bet it's fun. :)

-Mike

Nathan

Do you plan on making the map for the green / pump gas available to the public? :D

Allan

Absolutly Bada**. That is some amazing torque. I can imagine that the stock clutch would be letting go, as even mine is now on the street. That C16 really lets it rip.

1st and 2nd must be a lesson in countersteer. ;)

Great tune!

Jeff Sponaugle
PDXTuning.

Originally posted by WRBLUEWAGON
Nice numbers.

I'm wondering what water injection will do with pump gas?

Perrin's STI with the green was running water injection for the pump gas runs, which netted about 375whp. However, we didn't end up tuning the lower boost maps without the WI, so it is not conclusive.

With my car on the dyno, it lost about 10hp with the WI turned on without any further tuning. The magic question is can you get the 10hp back plus more with it on. I believe you can, but it is still relying on the pump not failing. Mind you I like WI, but a good tune should be done first.

Jeff Sponaugle

Originally posted by sponaugle


1st and 2nd must be a lesson in countersteer. ;)


The car wants to go in every direction but the one I point it in when I stomp the gas. Even in 4th you have to fight to hold onto the wheel as the front diff tries to rip it out of your grip.

-Nathan
www.turboxs.com

Sounds like a fun ride :D :D

From the looks of that dyno plot is looks like it hits pretty hard, given that you double your torque in only 1000 rpm.

You planning on putting more tire under it, or staying with stock size rubber?

Larry

Originally posted by nmyeti
Even in 4th you have to fight to hold onto the wheel as the front diff tries to rip it out of your grip.

-Nathan
www.turboxs.com

Whoa! :eek: And all I want is 350-360whp.....Amazing numbers Nathan! Keep it up.

Anthony
www.mauromotorsports.com

Originally posted by hotrod
Sounds like a fun ride :D :D

From the looks of that dyno plot is looks like it hits pretty hard, given that you double your torque in only 1000 rpm.

You planning on putting more tire under it, or staying with stock size rubber?

Larry

I am going to try to keep it on stock sized rubber for now. I've been down this road with the WRX and I'd rather spin the tires a bit at the track then kill the driveline.

Right now the car in some ways reminds me of driving on slick rock in my old locked and lifted FJ40 cruiser. The STI, much like the cruiser, wants to turn the direction of the wheel that has traction.

I expect this to only get worse as we put a clutch in the car.

-Nathan
www.turboxs.com

I understand the preserve the drive line thing, I spent way too much time replacing drive lines, and u-joints on my Chrysler Hemi until I got all the suspension points, and unjoint angles sorted out.

I understand that Cobb is running something like 10 inch wide Kodiac wheels on their car, I wonder how they are controlling torque steer with that kind of traction. I've never driven a high powered AWD with the various locker front diffs, so not sure what effect that has either.

Your also in a completely different world than most of us with the torque numbers your putting down.

Just out or curiosity, does anyone know how much if any effect front caster settings, and toe in/out have on torque steer?

Don't suppose a 4x4 style steering damper would help any?

Larry

Good point larry. I have experienced this same issue on my car and on other WRX's.. Most of the time its that Open front diff on a WRX causing the grief.. Power going to one side then the other.. On a 6mt car with diffs its often times what I call a "confused" diff.. Trying running 400whp with an R160 rear end... Now thats a confused Differential. hehe. I bet some good alignment settings would help like you suggest.

C

I would definitely have to agree - toe has a massive effect on torque-steer and what it does to diffs. Camber would as well. what is the stock toe on the STi? I'm assuming that this car is still stock up there. Nathan?

-Sean

Originally posted by hotrod

Just out or curiosity, does anyone know how much if any effect front caster settings, and toe in/out have on torque steer?
I think that there are some improvements to be had in these settings, but I need to really think about it. I also have competing suspension goals now.

Originally posted by big_adventure
I'm assuming that this car is still stock up there. Nathan?

-Sean

Totally stock.

I don't know if the STi has toe-out dialed in stock. Some cars do. If it does, it would definitely contribute to torque-steer at real power levels.

-Sean

Originally posted by SkirtBoy
Nathan

Do you plan on making the map for the green / pump gas available to the public? :D

Allan

Please make it available also in the c16 map as well.:D

Cole

Originally posted by big_adventure
I don't know if the STi has toe-out dialed in stock. Some cars do. If it does, it would definitely contribute to torque-steer at real power levels.

-Sean

Suspension tuning is not my thing. I have a guy that I talk to about that sort of thing, so I just need to have a chat to find out his suggestions. Again this all goes back to competing goals. I do NOT want to make the car slower to react to steering inputs or slower on turn in. This is currently the only area where I feel that the STI is lacking.

-Nathan

Nathan

You appear to be missing us out :( :( :(

Originally posted by SkirtBoy
Nathan

Do you plan on making the map for the green / pump gas available to the public? :D

Allan

Originally posted by boost master
Please make it available also in the c16 map as well.:D

Cole

;)

Originally posted by SkirtBoy
Nathan

You appear to be missing us out :( :( :(





;)

I don't have an answer for you at this time. I have given out the green map to a few people, but I need a little more time with the car before I could possibly make base maps based off this dyno tune.

-Nathan
www.turboxs.com

Originally posted by nmyeti
Suspension tuning is not my thing. I have a guy that I talk to about that sort of thing, so I just need to have a chat to find out his suggestions. Again this all goes back to competing goals. I do NOT want to make the car slower to react to steering inputs or slower on turn in. This is currently the only area where I feel that the STI is lacking.

-Nathan

Always a problem: the tuning for a great drag car is different from a great street car which is different still from a track-day killer. For a drag car, you definitely want zero toe and really mild camber. For a street car, it depends, but you definitely don't want too much toe out, otherwise you compromise highway stability, and you don't want too much camber, because A) you'll follow every groove on the road, and B) you'll eat tires for breakfast. For the track, you may well want toe-out, and you definitely want some nasty camber. Those are just guidelines, of course, every car and every driver are different.

-Sean

Hey, Nathan do you think that the BIG MAF is needed for my setup?? 257 with 257 cams and a 5h-20g?? If not I am gonna get rid of it and get a different tune and start on that.

Thanks,
Richard

Originally posted by eightballrj
Hey, Nathan do you think that the BIG MAF is needed for my setup?? 257 with 257 cams and a 5h-20g?? If not I am gonna get rid of it and get a different tune and start on that.

Thanks,
Richard


No I don't think you need it.

Originally posted by eightballrj
Hey, Nathan do you think that the BIG MAF is needed for my setup?? 257 with 257 cams and a 5h-20g?? If not I am gonna get rid of it and get a different tune and start on that.

Thanks,
Richard

ZING!

Originally posted by nmyeti
No I don't think you need it.

Rich: What he said....

Jorge (RiftsWRX)
www.ProjectWRX.com

We need a middle finger smiley... for mike, JK LOL... thanks Nate, Jorge, and Mike!!. Now who wants a big maf or who will trade for a Turboxs regular intake??

Richard

Originally posted by nmyeti
I don't have an answer for you at this time. I have given out the green map to a few people, but I need a little more time with the car before I could possibly make base maps based off this dyno tune.

-Nathan
www.turboxs.com

Nathan

It would be cool if I could have a copy. I am going to get a custom tune (I'm going to be running 850CCPE injectors, for a start) but I think it would be a good starting point. If it is OK, I will PM you my email address.

Thanks

Allan

nice numbers :banana:

Originally posted by nmyeti
Stock
251ft/lbs 269hp

Pump
340ft/lbs 353HP

Race
437.6 ft/lbs 426.9HP


Because the only 'race' gas I have ever seen is 93 :) I'll only look at the pump numbers. +89 TQ and +84hp While this is good it doesn't seem like that much. With a TBE and EM most stock turbo cars are gaining 50-70hp and 70-90TQ, so this is just good because of the possibility to run high boost on c16?

Originally posted by nmyeti
The car wants to go in every direction but the one I point it in when I stomp the gas. Even in 4th you have to fight to hold onto the wheel as the front diff tries to rip it out of your grip.

-Nathan
www.turboxs.com

Wicked awesome. Congrats.

-st

Originally posted by big_adventure
I don't know if the STi has toe-out dialed in stock. Some cars do. If it does, it would definitely contribute to torque-steer at real power levels.

-Sean

It's supposed to be zeroed out, but many people (including myself) have had f'ed up alignment from the factory. Many people have cross-caster, camber, and toe issues. All of which, as you mention, become even more noticeable at crazy power levels like this car is running.


-st

Originally posted by kinger
With a TBE and EM most stock turbo cars are gaining 50-70hp and 70-90TQ, so this is just good because of the possibility to run high boost on c16?


He is talking WHEEL HP/TQ dude...

Thats a metric **** load of power and they really didn't do much at all to the car...it's all in the tuning man.

Originally posted by John Sever
He is talking WHEEL HP/TQ dude...

Thats a metric **** load of power and they really didn't do much at all to the car...it's all in the tuning man.

Yeah I don't care if its crank or wheel power just the difference I'm looking at. My point is that a TBE and a simple EM solution yields a difference of that 50-70hp versus 89, not knocking the c16 number which is amazing just seeing if this set-up would be something I'm interested in on pump gas.

Originally posted by kinger
Because the only 'race' gas I have ever seen is 93 :) I'll only look at the pump numbers. +89 TQ and +84hp While this is good it doesn't seem like that much. With a TBE and EM most stock turbo cars are gaining 50-70hp and 70-90TQ, so this is just good because of the possibility to run high boost on c16?

You do realize that is WHP, right?

Originally posted by SkirtBoy
You do realize that is WHP, right?

Yes I do, tell me why it matters when I'm just looking at the difference over stock?

Our car made 318whp and 333ft*lbs on the stock turbocharger. It also holds the record for that combo on our dyno. Most are around 310.

Even comparing the numbers to what our car put down, that’s a pretty decent gain over the stock turbocharger. It’s an even bigger gain when you consider that our stock car is down to 280whp at redline on the 318whp stock turbocharger run. The Green on the other hand is clicking along strong at over 340hp.

-Nathan
www.turboxs.com

Originally posted by kinger
Yeah I don't care if its crank or wheel power just the difference I'm looking at. My point is that a TBE and a simple EM solution yields a difference of that 50-70hp versus 89, not knocking the c16 number which is amazing just seeing if this set-up would be something I'm interested in on pump gas.

Ok...let me put it to you this way.
1)It's a very nice gain. You will feel it and it's better than you make it out to seem.
2) If you don't feel like running race gas or (high octane 100+) don't get a big turbo. I feel it's almost not worth the added costs, lag and difference in driveability. A 20g or green tuned for only pump is a waste i feel. You'd be much happier with a vf series or even as big as an 18g or 1820.

Lastly i used to hate race gas. I thought it was stupid to waste money on it and have to deal with putting it in and not being able to have your car be that fast all the time. After using toulene and then c-16 i would've liked to run straight c-16 all the time. I think even used sparingly it's worth it to make race gas a part of your life.:D

Originally posted by Soon2Bgreat
You'd be much happier with a vf series or even as big as an 18g or 1820.

That's what I'm thinking. Thanks!

Soon2Bgreat.... that is only true if you are on stock heads and valvetrain... the gains get lesser and lesser as your head work gets better and better.

Originally posted by eightballrj
Soon2Bgreat.... that is only true if you are on stock heads and valvetrain... the gains get lesser and lesser as your head work gets better and better.

good point...but why go all out to only run pump gas? Even with a jdm sti i feel the same way. It's all opinion of course though. :)

With my car on the dyno, it lost about 10hp with the WI turned on without any further tuning. The magic question is can you get the 10hp back plus more with it on. I believe you can, but it is still relying on the pump not failing. Mind you I like WI, but a good tune should be done first.

I'd love to see you do 20-30 back to back runs with the water injection off and then the same with it on. I would think that the 30th run with water injection on would produce more hp than the 30th run w/o the water.

Originally posted by eightballrj
Soon2Bgreat.... that is only true if you are on stock heads and valvetrain... the gains get lesser and lesser as your head work gets better and better.

:confused:

Nathan,

I am currently buying parts for a green conversion, clutch and aluminum flywheel are next on the list. What kind of clutch are you going to get with your set up? Thanks!

Originally posted by Soon2Bgreat
Ok...let me put it to you this way.
If you don't feel like running race gas or (high octane 100+) don't get a big turbo. I feel it's almost not worth the added costs, lag and difference in driveability. A 20g or green tuned for only pump is a waste i feel. You'd be much happier with a vf series or even as big as an 18g or 1820.


It is very obvious you live at sea level. Lucky you. Having 10psi on the stock turbo at 7k at the altitude I live at is not much fun. 20psi at 7k with the green on the other hand should be a lot of fun even on pump gas.

Using toluene with the stock turbo because of its tiny hot side causes the EGT's to shoot thru the roof in 5th/6th over 5500rpm's. Using the green etc will give you alot cooler EGT's because the hot side is big. Looking at Nathan's plots the green spools very nice. Personally I'm going with the AVO 450 as I bought it months ago for a very good price.

Nate
Whens that turbo going on;) Clutch got ya beat till then.

Hi Nathan

I sent you email 3 times about the tuner. Did you get it? I got no reply at all. Thanks

Setiawan

Serious Noob question...sorry.

What is an FP Green turbo, who makes it and what are the specs??

Thanks!

Originally posted by 04STiguy
Serious Noob question...sorry.

What is an FP Green turbo, who makes it and what are the specs??

Thanks!

FP = www.forcedperformance.net As for the rest search... there are many threads on the green. Good drag/big boy turbo, not very responcive, there are others out there.

wow...all this off verry few mods....and a 2 1/2''
exhaust!

would a 3'' benefit you at all??

I would love to be able to get a 2.5'' Cat back now....so that when I go turbo I can just match up my downpipe and new highflow cat to the midpipe.

But I'm debating on 3''.....

any chance you guys could get a link up of the sound during a pull?

any idea what boost you could run and what power it would make on 101 Unleaded??

nice numbers, btw.

thanks.

wow, the numbers on pump gas are amazing themselves!!! i wouldnt mind having JUST 350whp :lol:

very nice work.

FP = www.forcedperformance.net As for the rest search... there are many threads on the green. Good drag/big boy turbo, not very responcive, there are others out there.

Not very responsive ? on what displacement ? On a EJ257 Perrin got 1bar at 3100rpm. And I believe 2.0 bar at 3800. Not much lag there.
Shawn

P.S.
Granted this isn't the be all end all of turbos but for the money the performance/response on the EJ257 is good.

Originally posted by sc00by71
Not very responsive ? on what displacement ? On a EJ257 Perrin got 1bar at 3100rpm. And I believe 2.0 bar at 3800. Not much lag there.
Shawn

P.S.
Granted this isn't the be all end all of turbos but for the money the performance/response on the EJ257 is good.

as toto pointed out to me in a diff thread (i didnt think about it either), was that they are talking about responsiveness, not spool up time...which is quite different. responsiveness is how the turbo reacts in day to day driving, and how quickly it reacts to input (gas).

so this was with stock tmic and stock headers? interesting...

Originally posted by Imprezd
:confused:

I mean the gains from pump gas to race gas. You seem to make so much more power on pump that it makes the difference between race gas and pump gas numbers not be so great. If I am wrong... sorry for the misinformation but thats the way it looks on most of all the dyno charts I have seen.

Richard

Dyno charts are liars. :)

But once you get that high, a couple HP is irrelevant.

What octane pump was this on? thnx

Also what type of dyno? thnx a lot.

It was on TurboXS's Dynapak. Hey Mike, what do ya mean about the couple of horsepower. I know that dynos can lie but if you test both race gas and pump gas on the same day you would get comparable results. I just thought I had seen when people went from pump to race with the vf30s on stock heads that they gained much more horsepower with the gas change than did the guys with some nice big port heads. I am prolly wrong though. But, it would make sense because both the intake and exhaust sides are more efficient as are the combustion chambers(I think) with the nicer heads. Isnt it the head's efficiency or lack there of that is what is shown by the huge gains in pump to race gas tunes?? Thanks for the enlightenment either way:).

Richard

Thnx eightball.

nathen, are you going to the drag strip any before the shootout? I know you guys are busy, but take a break to have some fun in the real world. I want to hear some 10s from you guys. track-o-phobia?

scott hudson

See, this is where a DynoPack dyno, like the one I advertised for sale, would
come in handy. There is no 'skipping' or jumping off the rollers with a dyno
that mounts directly to the hubs. It would also eliminate the non-linear losses
you see from the tire/roller contact patch as HP increases towards extreme
levels -- like in this case. That means you will see higher HP and torque
gains, like the engine is actually producing. The gains won't be masked by
increased tire/roller slippage.

Nathan, those are some wicked numbers. It would be nice to see what a more
'streetable' tune would yield on the car -- few people drive around with a
tank full of C16 :-) Something that runs on Pump 93 but is over 400HP would make alot of people drool -- and line-up at your door.

See, this is where a DynoPack dyno, like the one I advertised for sale, would
come in handy. There is no 'skipping' or jumping off the rollers with a dyno
that mounts directly to the hubs. It would also eliminate the non-linear losses
you see from the tire/roller contact patch as HP increases towards extreme
levels -- like in this case. That means you will see higher HP and torque
gains, like the engine is actually producing. The gains won't be masked by
increased tire/roller slippage.

Nathan, those are some wicked numbers. It would be nice to see what a more
'streetable' tune would yield on the car -- few people drive around with a
tank full of C16 :-) Something that runs on Pump 93 but is over 400HP would make alot of people drool -- and line-up at your door.


This dyno WAS on a dynapak hub dyno.

See, this is where a DynoPack dyno, like the one I advertised for sale, would
come in handy. There is no 'skipping' or jumping off the rollers with a dyno
that mounts directly to the hubs. It would also eliminate the non-linear losses
you see from the tire/roller contact patch as HP increases towards extreme
levels -- like in this case. That means you will see higher HP and torque
gains, like the engine is actually producing. The gains won't be masked by
increased tire/roller slippage.

Nathan, those are some wicked numbers. It would be nice to see what a more
'streetable' tune would yield on the car -- few people drive around with a
tank full of C16 :-) Something that runs on Pump 93 but is over 400HP would make alot of people drool -- and line-up at your door.

400whp would make me drool:) Id have to sell my kidney then to get the parts:) I think the garret series turbo kits coming out from dan could get you up there probably on pump.

wow

I second the above.....

pass dat clutch... pass dat clutch!

as the guy asked before....what clutch/flywheel are you gonna use? i'm doing the green, utec, and support as well, and want to know what you think.

Wow. Crazy increases there. That's a TON of boost too.

god damn that's an amazing set of numbers nathan....I'm lucky I live in Annapolis, makes me want to come in and have you work your magic on my car... :banana:

~Tim

welcome to two months ago, im glad my post of this thread bumped it up because i want to know the clutch/flywheel upgrade

ACT clutch with the stock flywheel.

-Nathan

6-puck? 4-puck? I KNOW you're not going with an organic or kevlar disc, right? Please? I don't want to hear about that melting too!

-Sean
Proud Twin-Plate Operator

one of our locals is running 32psi on race gas on a green with the organic ACT. works well from what he was telling me.

I sense imminent disentegration. That clutch is not designed for nearly that much torque. But to each his own.

-Sean

anyone here use a SPEC clutch? (or heard anything for that matter) i used to have one on a 99 trans am, and liked it. but one with a subaru i dont know about.

A few folks down here are running them, and generally like them. None of them run the power level that I do.

The issue, as always with clutches, is the tradeoff between streetability and durability. I chose the clutch I chose because getting the 6MT out of my 04 wagon is an absolute beyotch and I do not want to have to do it again in 5000 miles. Is the twin-plate grabby? Well, yes. But you get used to it, and once it beds, it's much better than it was for the first 1000 miles. Does it chatter when cold when the clutch is disengaged? Yes. However, pedal effort is right about stock, and it will hold 600lb/ft of torque at least. I drive in traffic every day, and it's not that bad at all. Yes, getting any slip at all takes practice, and there are no "medium launches". Either you let it rip, or you drive like granny until the turbo spools. But that probably saves me tickets anyway.

-Sean

Spec clutches - my plan is still to run a 6 puck, wrx stage 3 spec clutch, with a MRT flywheel when my sti clutch goes. I already had the flywheel, hence the choice of the wrx clutch.

Kevin

i will probably get the spec stage 3 as well, carbon or ceramic though? how much does the mrt flywheel weigh in comparison to the fidanza flywheel?

Kevin -

Pony up the cash and get something twin-plate. If you drive it a lot, you will never regret the decision. My twin-plate with ceramic discs is more streetable than some peoeple's organic super-stiff singles, to say nothing of people running single-disc race clutches. Plus, twin-plates rev faster (less inertia) and hold significantly more power.

-Sean

is yours a spec twin plate?

Exedy

-S

where did you get yours from?

Nino's. On sale for cheap cheap cheap, relatively speaking, of course.

Kevin -

... Plus, twin-plates rev faster (less inertia) and hold significantly more power.

-Sean


I always thought that dual plated clutched had MORE rotating mass than a single plate alone. Wouldn't 2 plates weigh more than a single?

The stock WRX clutch is 230mm The stock STi clutch is 240mm. the Exedy twin-plate has 2 200mm discs. More friction surface but considerably less rotational inertia. Imagine spinning a solid 45lb sphere. Now imagine spinning a 45lb barbell plate. What's easier to spin?

In any event, the super-light flywheel and light, 200mm pressure plate with forged cover contributes a lot as well. The entire assembly - flywheel, pressure-plate, center plate and dual discs weighs only 30lbs. The stock stuff is closer to 50 than 40.

-Sean

awesome numbers can't get over it

but jesus that **** is expensive. 12 for the clutch and another 3-350 (maybe) for the flywheel. guess i need to be easy on this one til i get enough money to replace it right. :furious:

What's 12 + 3-350? All the twin-plates that I know of include clutch, flywheel and pressure-plate as a kit - they have to because the surfaces are different. I paid something like $1300 shipped for mine - flywheel, clutch(es), pressure plate, middle plate, everything. As a warning, the Exedy twin-plate does not include a throw-out bearing or a clutch tool.

-Sean

i did not know that the exedy came with the flywheel, thats where the + 300 came from. i wonder if the specs come with a throwout bearing?

I just reused the STi one. No worries.

-Sean

Whats the driveability like with the exedy twin plate clutch ??

Can it still be used easily in a daily drive ??

the thing I don't like about the exedy's ( or the regular off teh shelf ones) is that that are ceramic and the organic/carbon ones are $$$. they take a bit of getting used to on the singles, the twins aren't that bad.

personally I'ld go with a tilton over them though. its in teh same weight range as the Exedy's, do take forever to get replacement disks ( and the replacements are cheap) and the new hydraulic release bearing makes pedal pressure almost lighter than stock. With the Tilton you can choose between a 540tq setup and a 740tq setup and pedal pressure doesn't change. you can also get them in organic or ceramic for different purposes.