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Old 04-23-2011, 06:48 PM   #1526
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Quote:
Originally Posted by langsbr View Post
I've got a V7 STI motor with an afermarket downpipe and exhaust. I do have working AVCS and it's been tuned for 93.

It makes ok power, but I guess I was expecting more - perhaps its a bit of 207 hype, but Ive also seen quite a few in PPB that make a good bit more.
Are you coming from a high power USDM setup?
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Old 04-23-2011, 06:52 PM   #1527
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Quote:
Originally Posted by llamsn View Post
Are you coming from a high power USDM setup?

I don't know what he's talking about, I previously had 04WRX EJ205 with VF34 and the EJ207 blows that away. The EJ207 makes power all the way to a lot higher redline than the EJ205. I would suggest to the OP he needs a bigger turbo if he's looking for big power, the stock VF37 is a really small turbo.
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Old 04-23-2011, 11:52 PM   #1528
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Originally Posted by llamsn View Post
Are you coming from a high power USDM setup?
previously I had a 205 with a VF22.

No doubt the 207 is a better and stronger motor - I just didn't see the type of numbers I was expecting. The vf22WRX setup I had made 270whp on a dynojet and ran 105 traps.

I haven't run this at the track yet, but I'm showing anywhere from 270 - 290 on airboy with the 207. Maybe I was hoping for too much?

There's a lot of guys on here with 207s and high dynos, but not many have run them at the track, so it's definitely hard to compare directly. I need to run mine to see what it's 'really' making, so to speak.

I know the vf37 is a better turbo than the vf30 I have, but I still don't see it making power to redline - sure it will hold power, but it won't keep increasing.
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Old 04-24-2011, 02:02 AM   #1529
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d000000d, if you're looking for major HP you need to ditch the VF30 and go with a much bigger turbo, your V7 EJ207 can handle it so why not? The only thing holding back your engine is your turbo doggy.


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Originally Posted by langsbr View Post
previously I had a 205 with a VF22.

No doubt the 207 is a better and stronger motor - I just didn't see the type of numbers I was expecting. The vf22WRX setup I had made 270whp on a dynojet and ran 105 traps.

I haven't run this at the track yet, but I'm showing anywhere from 270 - 290 on airboy with the 207. Maybe I was hoping for too much?

There's a lot of guys on here with 207s and high dynos, but not many have run them at the track, so it's definitely hard to compare directly. I need to run mine to see what it's 'really' making, so to speak.

I know the vf37 is a better turbo than the vf30 I have, but I still don't see it making power to redline - sure it will hold power, but it won't keep increasing.
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Old 04-24-2011, 08:23 AM   #1530
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Can you compare the VF30 fully spooled RPM with the VF22 fully spooled RPM? Does the 207 spool earlier, due to AVCS?
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Old 04-24-2011, 10:05 AM   #1531
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Since it wasnt a true comparison between turbos, its a bit hard to say, but there was definitely a good bit more low end torque on the 207. I didnt have a tactrix when I had the 205 w/vf22, but it feels like the 207 spools about 3 -500 rpms sooner.

murrdogg - Im aware that the vf30 is a small turbo, and I have a rotated waiting to go on (building a house so car waits). I simpy feel that either my tune is off, or I expected too much from the stock 207. Theres numerous stock 207 setups that are dynoing over 300hp, even on airboy. Why is mine missing out on 30+ hp?
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Old 04-24-2011, 11:40 AM   #1532
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Not sure why you would be down 30hp what other people are making? What other supporting mods do you have? Full exhaust, intake etc..

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Originally Posted by langsbr View Post
Since it wasnt a true comparison between turbos, its a bit hard to say, but there was definitely a good bit more low end torque on the 207. I didnt have a tactrix when I had the 205 w/vf22, but it feels like the 207 spools about 3 -500 rpms sooner.

murrdogg - Im aware that the vf30 is a small turbo, and I have a rotated waiting to go on (building a house so car waits). I simpy feel that either my tune is off, or I expected too much from the stock 207. Theres numerous stock 207 setups that are dynoing over 300hp, even on airboy. Why is mine missing out on 30+ hp?
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Old 04-24-2011, 12:07 PM   #1533
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Quote:
Originally Posted by langsbr View Post
Since it wasnt a true comparison between turbos, its a bit hard to say, but there was definitely a good bit more low end torque on the 207. I didnt have a tactrix when I had the 205 w/vf22, but it feels like the 207 spools about 3 -500 rpms sooner.

murrdogg - Im aware that the vf30 is a small turbo, and I have a rotated waiting to go on (building a house so car waits). I simpy feel that either my tune is off, or I expected too much from the stock 207. Theres numerous stock 207 setups that are dynoing over 300hp, even on airboy. Why is mine missing out on 30+ hp?
Have you played with the avcs, i remember you posted in the engine management tuning forum and looked at your logs and suggested that you run more avcs advance down low...any news on that?
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Old 04-24-2011, 01:07 PM   #1534
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Quote:
Originally Posted by langsbr View Post
Since it wasnt a true comparison between turbos, its a bit hard to say, but there was definitely a good bit more low end torque on the 207. I didnt have a tactrix when I had the 205 w/vf22, but it feels like the 207 spools about 3 -500 rpms sooner.

murrdogg - Im aware that the vf30 is a small turbo, and I have a rotated waiting to go on (building a house so car waits). I simpy feel that either my tune is off, or I expected too much from the stock 207. Theres numerous stock 207 setups that are dynoing over 300hp, even on airboy. Why is mine missing out on 30+ hp?

If you're runing stock that sounds about right. If you've replaced hoses and other small engine components you won't see much. Same for a catback exhaust, you'll get bigger power from replacing the whole exhaust. I'll depends on what is done.
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Old 04-25-2011, 03:58 PM   #1535
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Quote:
Originally Posted by langsbr View Post
I know the vf37 is a better turbo than the vf30 I have, but I still don't see it making power to redline - sure it will hold power, but it won't keep increasing.
Using some helper springs on the wastegate will help with that. The flapper tends to blow open which decreases max boost during high rpm.

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Old 04-25-2011, 06:40 PM   #1536
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def - are you saying that the vf30 should hold 20psi to redline? I would think that is well past its efficiency range.

I can understand hitting peak power in the 6K range, and then boost tapering and power being flat until redline, but it will continuously gain?

How much boost should I see at high rpms?

I do have a full TBE.
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Old 04-25-2011, 09:20 PM   #1537
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One thing I've noticed is that I'm getting a lot more exhaust noise since the swap.

I put all new gaskets on everything and I'm positive it's not an exhaust leak.

The difference in sound from my last set up to now is like the difference between a stock WRX and stg2 WRX with a catless DP and full 3" cat back.

I had the same exact exhaust set up on my built ej205 and wasn't half as loud.

Is this something others have experienced? a large increase in exhaust noise with this motor?
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Old 04-25-2011, 09:56 PM   #1538
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Quote:
Originally Posted by langsbr View Post
Since it wasnt a true comparison between turbos, its a bit hard to say, but there was definitely a good bit more low end torque on the 207. I didnt have a tactrix when I had the 205 w/vf22, but it feels like the 207 spools about 3 -500 rpms sooner.

murrdogg - Im aware that the vf30 is a small turbo, and I have a rotated waiting to go on (building a house so car waits). I simpy feel that either my tune is off, or I expected too much from the stock 207. Theres numerous stock 207 setups that are dynoing over 300hp, even on airboy. Why is mine missing out on 30+ hp?
Im making 260whp on my stage 2 V7 swap myself. One thing my tuner said I need to swap out my stock air box for an intake. Also he said the V7 motor does not run a knock sensor above 6k rpms and I dont have an EGT or AF gauge he does not want to push it to hard because of that. Once I get an intake and some sort of EGT or AF gauge he would retune and I would see alot of better numbers. Hope that helps a little bit with you. Also what dyno are you using, the one mine got dynoed on is infamous for reading low numbers.
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Old 04-25-2011, 11:36 PM   #1539
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I've seen a dyno plot on the Type RA site, for a stock Spec C putting down 260 WHP.
But this is with the UK gas corresponding with the Japanese gas, roughly 100 US octane.
The pull was in 4th gear.
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Old 04-26-2011, 03:10 AM   #1540
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Quote:
Originally Posted by Bu11dogg2 View Post
One thing I've noticed is that I'm getting a lot more exhaust noise since the swap.

I put all new gaskets on everything and I'm positive it's not an exhaust leak.

The difference in sound from my last set up to now is like the difference between a stock WRX and stg2 WRX with a catless DP and full 3" cat back.

I had the same exact exhaust set up on my built ej205 and wasn't half as loud.

Is this something others have experienced? a large increase in exhaust noise with this motor?
What are you running for exhaust? Are you using the same cat-back as you did on your EJ205? Do you have a cat at all?

On my EJ205, I ran a catless dp with my Borla Hush and it was too loud for my liking. I did that for only a couple of days and then threw the factory 3rd cat back in place. That helped quite a bit volume-wise! I soon decided that I wanted high-flow cats, so I put 2x 3" cats and that quieted my car significantly. Matching that with the Hush sounded great and fairly quiet, but very deep (I would set off car alarms often in residential areas or while parallel parking).
However, the Hush drone finally got to me (see wagon), so I went back to the oem 2 tip muffler and still run that with with the 2x high flow cats. It's slightly louder than oem dp's, but not much.
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Old 04-26-2011, 07:31 AM   #1541
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Quote:
Originally Posted by llamsn View Post
What are you running for exhaust? Are you using the same cat-back as you did on your EJ205? Do you have a cat at all?

On my EJ205, I ran a catless dp with my Borla Hush and it was too loud for my liking. I did that for only a couple of days and then threw the factory 3rd cat back in place. That helped quite a bit volume-wise! I soon decided that I wanted high-flow cats, so I put 2x 3" cats and that quieted my car significantly. Matching that with the Hush sounded great and fairly quiet, but very deep (I would set off car alarms often in residential areas or while parallel parking).
However, the Hush drone finally got to me (see wagon), so I went back to the oem 2 tip muffler and still run that with with the 2x high flow cats. It's slightly louder than oem dp's, but not much.
GT Spec headers/UP, COBB catted DP and COBB cat back.

The only difference between my old set up and now is the motor.

The increase in sound is definitely coming from the turbo/dp area.
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Old 04-26-2011, 09:46 AM   #1542
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Quote:
Originally Posted by Bu11dogg2 View Post
One thing I've noticed is that I'm getting a lot more exhaust noise since the swap.

I put all new gaskets on everything and I'm positive it's not an exhaust leak.

The difference in sound from my last set up to now is like the difference between a stock WRX and stg2 WRX with a catless DP and full 3" cat back.

I had the same exact exhaust set up on my built ej205 and wasn't half as loud.

Is this something others have experienced? a large increase in exhaust noise with this motor?
My Friend went from a stg2 ej205 to a stock ej207 with the same exhaust and actually added a cat and it was a lot louder too so i guess its normal!
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Old 04-26-2011, 10:06 AM   #1543
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Originally Posted by rstinut View Post
My Friend went from a stg2 ej205 to a stock ej207 with the same exhaust and actually added a cat and it was a lot louder too so i guess its normal!
That's what I'm hoping
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Old 04-26-2011, 10:35 AM   #1544
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Quote:
Originally Posted by Vlad View Post
I've seen a dyno plot on the Type RA site, for a stock Spec C putting down 260 WHP.
But this is with the UK gas corresponding with the Japanese gas, roughly 100 US octane.
The pull was in 4th gear.
was that stock?

For the person saying they were disappointed, i dont think the dyno will show anything really... its about how its feels. a jdm v7 or 8 will pull harder for longer.
On a dynodynamics I pushed 308 hp/291 tq WITH a 1.15 correction factor, so about 268 hp/253 tq
mods were basic stage 2- catless turboback and ebcs.
http://forums.nasioc.com/forums/show...highlight=spec
I will say tho, it pulls MUCH better than when i had an ej205 with the same basic "stage 2" mods
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Old 04-26-2011, 10:52 AM   #1545
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I'm going to try to post a link.
The dyno was weird, cause instead of engine speed horizontal, you had vehicle speed.

But the Spec C is supposed, depending on the year to put out crank 280HP to 320 HP (the 280 was before the end of the "gentleman's aggreement, 320 after, when the truth came out) , and since regular USDM Sti usually dynoed at the wheels 230-250 depending on the dyno, this dynoing 260 sounds credible to me, especially on "normal" 100 octane Japanese/UK gas, that these cars expect to see, and are tuned for, stock.
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Old 04-26-2011, 11:12 AM   #1546
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I spun a rod bearing on my 2002 2.0 and I was going to get a built short block but I am really starting to look into these EJ207 motors. If i would get one of these motors can they be tuned for 300 whp on 93 with out doing any mods just a pro tune. This is my DD and I just want nice power and a nice reliable motor. What version do you guys recommend the V7 or V8 motor to look into getting?

Eric
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Old 04-26-2011, 12:57 PM   #1547
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Quote:
Originally Posted by Legend83 View Post
I spun a rod bearing on my 2002 2.0 and I was going to get a built short block but I am really starting to look into these EJ207 motors. If i would get one of these motors can they be tuned for 300 whp on 93 with out doing any mods just a pro tune. This is my DD and I just want nice power and a nice reliable motor. What version do you guys recommend the V7 or V8 motor to look into getting?

Eric
Do you have any current Mods on your current setup? i.e Downpipe, Catback? As for the HP, you can achieve 300whp with a good flowing exhaust and perhaps an intake. However Dyno numbers vastly differ, so who knows what you will get. All that really matters is how the car feels to you and if you like drag racing then I suppose you could do that and prove it with hard numbers.

As for Ver.7 or Ver8, the Ver.7 will be cheaper to get up and working as your existing exhaust system will bolt up to the turbo. If you get the Ver.8 it uses the TwinScroll turbo and you will need to either get a TwinScroll Downpipe fabbed up to work or you could use the Stock Downpipe that comes with your Ver.8 Engine. However the JDM downpipes are shorter in length, so a local exhaust shop will need to lengthen it by about I think it's around 6 inches or so...
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Old 04-26-2011, 04:04 PM   #1548
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Quote:
Originally Posted by Legend83 View Post
I spun a rod bearing on my 2002 2.0 and I was going to get a built short block but I am really starting to look into these EJ207 motors. If i would get one of these motors can they be tuned for 300 whp on 93 with out doing any mods just a pro tune. This is my DD and I just want nice power and a nice reliable motor. What version do you guys recommend the V7 or V8 motor to look into getting?

Eric
REad my post above.
Couple things:
JDM version 7- has FORGED internals (so if u plan on modding, itll be able to handle it) vf30
JDM version 7 spec C- has FORGED internals plus the bigger port heads. (again gives you more power and you can upgrade to a bigger turbo while still having the reliability of the forged pistons) vf30/vf34
JDM version 8- NOT forged, but hypereutectic pistons. Stronger than the USDM, but not as strong as forged. However, this isnt something to look down it, its a beast motor. And like the v7 spec C- it has the bigger port heads for better flow. Has the twin scroll setup vf37

As for 300whp, depends what dyno. I have just a downpipe, catback, and boost controller. On theSHOPCT's dyno for example, i pushed around 308 whp. If I went to ECS's Dyno, id be hitting around 270ish. Again, really depends on dyno, and correction factor.

If you are gonna stay stock, and have no plans on modding, Id say go with the version 8. The internals are still beefy, you get big port heads, and its twin scroll. for your DD, just slap on a dp and exhaust u should be around 300
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Old 04-26-2011, 04:09 PM   #1549
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Just to clarify the above post. V8 internals are forged other than the pistons which are hypereutectic.
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Old 04-26-2011, 07:35 PM   #1550
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Thanks for the replys everyone. I currently have no mods on my EJ205 motor its all stock except for an SPT cat back exhaust thats it. So i think either the Version 7 or 8 is going to be a big step up for me coming from the stock EJ205. IF i would go with the Verson 7 how do they respond to an 18g turbo how is spool and what power we talking about with that and will that allow me to use the whole power band of this motor? I dont want lag this is a daily driver. How is the factory V8 twin scroll turbo setup can you use the whole power band and when does it get on boost?

Thanks again all for your responses,


Eric
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