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Old 04-06-2011, 11:18 PM   #1
epicroot
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Event: quarter mile
Location: Rockingham nc
Ambient Temp: 78
Elevation: unknown
Weather: hot
Track and Conditions: asphalt/flat
Tires: nexums stock size

Car: 05 wrx 2.0
Tuner: Tod motion lab tuning
Charlotte nc
Transmission: 5spd factory

Target Boost: 22psi
Target AFR: 11:1
Fuel: 93 oct unleaded
Engine/Power Modifications:
Stock td04
3 inch turbo back exhaust
Hks uppipe
Mlt 3 port ebcs
Ic tilt
Throttle body bypass mod

Driveline Modifications: stock
Suspension Modifications: stock

Driving style: launching at around 4.5- 5k
flat foot shifting.
Shifting @ around 6.5 k

R/t .005
60. 1.773
330. 5.543
1/8. 8.592
Mph 81.51
1000. 11.215
1/4. 13.442
Mph. 101.13

So after seeing all of this in yalls opinion am I running around what I should be for my mods...?

Also id like any input on some better techniques ie. Shift point launch rpms. Etc.

Thanks for looking
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Last edited by epicroot; 04-06-2011 at 11:54 PM.
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Old 04-06-2011, 11:22 PM   #2
Scooby921
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Please reformat your post to the required format found here. When people have more/all the details they can give you a better answer. Thanks.

http://forums.nasioc.com/forums/show....php?t=1858764
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Old 04-06-2011, 11:30 PM   #3
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Flat foot shifting the 5 speed... Goodluck! And the trap looks about right.
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Old 04-06-2011, 11:47 PM   #4
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I updated 1st post..

And I know its not good for a 5 speed to flat foot shift
I plan on it not lasting long

I will upload the timeslip when I get home from work in the morning
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Old 04-07-2011, 02:30 AM   #5
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22psi on the TD04
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Old 04-07-2011, 02:42 AM   #6
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any idea on your power? at redline with a TD04 you'll be lucky to have a lot of boost so while you may have 22psi down low, you dont have it up top. if you changing gears at 6500rpm and your a fast shifter your probably back into the RPM's at 4500-5000. by then your boosts tapered off and the TD04 isnt doing much. id say your a good second off OEM times and that your good all around.

i like the numbers though, good 1.7 60 foot, all your MPH fall into place, and 1/8 and 1/4 times are where they should be. i wouldnt change anything at all driving wise. unfortunately the TD04 has to go to get better numbers and maybe one day the 2.0L motor.
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Old 04-07-2011, 03:43 AM   #7
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I really have no idea on hp tq numbers...

I taper off at redline to about 15psi.

I am rebuilding a larger turbo right now and gathering the supporting mods.

While the td04s on the car should I try shifting earlier to get better times.

Im interested in seeing what the best time I can achieve with everything I have done so far

Last edited by epicroot; 04-07-2011 at 06:28 PM.
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Old 04-07-2011, 06:37 AM   #8
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the td04 is truly a tiny turbo... its jut not efficient in the boost range you're using it at at all. and i don't read that you've done any intercooler changes or anything...

Essentially at 22psi you're blowing really hot air and i'm betting your car is pulling timing so it doesn't knock.

I mean a stock turbo can only flow so much... however... the time isn't to bad for being stage 2... What is the throttle body bypass mod??
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Old 04-07-2011, 06:26 PM   #9
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No doubt im pulling in hot air.

The throttle body bypass mod is


There's two coolant lines that run into your tb.. so essentially you pumping 250 degree coolant thru ur tb as its sucking in cold air. Essentially heating up your tb air charge ... you just disconnect. The two lines and connect them together with a barb fitting.. so that it never goes thru your tb .

Some have claimed hp gains from this.

I just did it because it makes since. Why heat up cold air.
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Old 04-07-2011, 07:32 PM   #10
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I did it too only because installing the manifold is a PITA so why do more than you have too.

If you had a different turbo I'd say get an intercooler, re-tune and try again. but why tune twice?
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Old 04-07-2011, 08:08 PM   #11
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Quote:
Originally Posted by epicroot View Post
No doubt im pulling in hot air.

The throttle body bypass mod is


There's two coolant lines that run into your tb.. so essentially you pumping 250 degree coolant thru ur tb as its sucking in cold air. Essentially heating up your tb air charge ... you just disconnect. The two lines and connect them together with a barb fitting.. so that it never goes thru your tb .

Some have claimed hp gains from this.

I just did it because it makes since. Why heat up cold air.
That is the first time I've heard of that but it makes total sense. You are pretty much out of your efficiency range on your turbo, as others have stated. E85 or meth would help you out quite a bit though.

As for your time, that seems pretty good. Try to find the elevation of the track you ran the time at.


For the record, I have been flat foot shifting my stock 5 speed for a while and it has held up fine. I suppose it's not legitimate flat foot shifting but I know I barely lift my foot when I do. I have only done it 2nd to 3rd and 3rd to 4th. I've done it 1st to 2nd once but I am saving the life of the trans for the track.
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Old 04-07-2011, 08:30 PM   #12
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The next tune will possibly be on e85.. im actually in the process of rebuilding a turbo that will be used for my next upgrade.

I have the fuelpump bu still must source a front mount and injectors..

Kinda struggling in this economy rightn ow. So hopefully within a month. Ill have everything ready
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Old 04-07-2011, 08:31 PM   #13
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Rockingham is 436 ft above sea lvl
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Old 04-07-2011, 08:35 PM   #14
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Quote:
Originally Posted by synolimit
I did it too only because installing the manifold is a PITA so why do more than you have too.

If you had a different turbo I'd say get an intercooler, re-tune and try again. but why tune twice?
Getting tuned for e85. Adding a 2 step.
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Old 04-07-2011, 09:53 PM   #15
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I really can't see why Subaru with all there rNd money would develop a coolant cooled or "heated" tb for no reason.......and the air passes through you tb so fast your doing nothing. You want it cooler get pholic spacers...
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Old 04-07-2011, 10:20 PM   #16
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Quote:
Originally Posted by epicroot View Post
Getting tuned for e85. Adding a 2 step.
Good choice. I just switched to E85 a couple weeks ago and it is the best money I've spent. I am going to get a P&L 38mm ewg setup and a boost controller. At some point I want to go to the track and see where I'm at.
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Old 04-07-2011, 10:22 PM   #17
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Subaru engineers did this this to prevent throttle body icing during cold starts.... there is no evidence that doing this mod has caused any damage..

And in ur response to air passing thru hot liquid will not make the air hotter is not correct..

It will raise the air temps.. how much in measurable temps I do not know.

I know for a fact that before this mod I could go do some wot pulls and not be able to leave my hand on the tb

Now I can do a few wot. Pulls and leave my hand on the tb without getting burned.


Like I stated earlier I did this because it makes since..

Any power gains from this were not registered on the butt dyno it just makes since.
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Old 04-07-2011, 10:23 PM   #18
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Quote:
Originally Posted by 96convt
I really can't see why Subaru with all there rNd money would develop a coolant cooled or "heated" tb for no reason.......and the air passes through you tb so fast your doing nothing. You want it cooler get pholic spacers...
All though I agree with your statement about spacers. . They are a great purchase..
I myself will be buying one soon
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Old 04-07-2011, 10:30 PM   #19
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the coolant in the throttle body is for northern states when it gets really cold out. helps keep the TB warm so nothing sticks open aka throttle butterfly and such. if u take the idle air control valve off u can see the coolant touches about 30% of the flat surface so it keeps that warm in the winter as well and working properly.

I didnt this mod and really dont think i will have a problem with my throttle sticking open. if so i can just turn the key off or put it in high gear and press the brakes to kill it. either way kind of a feature for ppl who wouldnt have the common sense to do so.

as for upgrades. ur td04 will love a sti tmic. i got the V8 so it has a bit more efficiency and volume than usdm ones but it really helps cool the intake temps and keeps your engien from pulling timing. u can run all the boost in the world but timing is also key to making power and getting ur car to accelerate hard.
just as reference the fastest td04 ej205 i have seen is at 500ft abs and just supporting mods go 12.78. i forget the mph though
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Old 04-07-2011, 10:47 PM   #20
epicroot
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I agree that an sti topmount would make a difference.. im making a bigger. Jump to a much larger turbo which will require a front mount..

On a side not anyone know the record for stock ic/ stock td04?

Another question if I was to lower my peak boost to say 18 psi.
Do you think id run any faster/ slower?

The 22 psi I have it pushing now is well out of its efficiency range.. I wonder if its creating a performance Decrease instead of increase to be running that much pressure.. just a theory here and feedback would be great
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Old 04-07-2011, 10:50 PM   #21
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Quote:
Originally Posted by 99STM

Good choice. I just switched to E85 a couple weeks ago and it is the best money I've spent. I am going to get a P&L 38mm ewg setup and a boost controller. At some point I want to go to the track and see where I'm at.


I wish there were more e85 pumps around here closest one is 15 min
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Old 04-07-2011, 11:10 PM   #22
99STM
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Quote:
Originally Posted by WhiteBgeye02 View Post
the coolant in the throttle body is for northern states when it gets really cold out. helps keep the TB warm so nothing sticks open aka throttle butterfly and such. if u take the idle air control valve off u can see the coolant touches about 30% of the flat surface so it keeps that warm in the winter as well and working properly.

I didnt this mod and really dont think i will have a problem with my throttle sticking open. if so i can just turn the key off or put it in high gear and press the brakes to kill it. either way kind of a feature for ppl who wouldnt have the common sense to do so.

as for upgrades. ur td04 will love a sti tmic. i got the V8 so it has a bit more efficiency and volume than usdm ones but it really helps cool the intake temps and keeps your engien from pulling timing. u can run all the boost in the world but timing is also key to making power and getting ur car to accelerate hard.
just as reference the fastest td04 ej205 i have seen is at 500ft abs and just supporting mods go 12.78. i forget the mph though
There have been guys to run better times than 12.78 on the TD04. I will find a link in a second.
Quote:
Originally Posted by epicroot View Post
I agree that an sti topmount would make a difference.. im making a bigger. Jump to a much larger turbo which will require a front mount..

On a side not anyone know the record for stock ic/ stock td04?

Another question if I was to lower my peak boost to say 18 psi.
Do you think id run any faster/ slower?

The 22 psi I have it pushing now is well out of its efficiency range.. I wonder if its creating a performance Decrease instead of increase to be running that much pressure.. just a theory here and feedback would be great
If you have a MBC, I would turn it down a little bit. Once you are on E85, you could probably turn it back up to 22psi.
Quote:
Originally Posted by epicroot View Post
I wish there were more e85 pumps around here closest one is 15 min
The closest pump to me is about 12 miles away. I live in a small town just outside of a bigger city. It is not very fun driving to get gas but I drive into town to do everything else anyways so it's not really out of the way by any means.
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Old 04-07-2011, 11:13 PM   #23
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Old 04-07-2011, 11:19 PM   #24
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I thought coolant ran through the throttle body to warm up the throttle plate so it doesn't stick? Just a guess.
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Old 04-07-2011, 11:22 PM   #25
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Quote:
Originally Posted by epicroot View Post

And in ur response to air passing thru hot liquid will not make the air hotter is not correct..

It will raise the air temps..

Like I stated earlier I did this because it makes since..

Any power gains from this were not registered on the butt dyno it just makes since.
So your trying to tell me that by removing the coolant line from your tb it will cool it down enough to lower your overall air intake temp!?!?!? this coming from a guy running 22 pounds on a tdo4 if u turned your boost down you would actually do more good. The overall amount of time the air spends in the tb is so fast you could freeze it and it wouldn't matter. You want cooler air I suggest a bigger ic
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