[WagonSleeps]

Just wanted to show you all my new numbers after my retune.
its a 2007 wrx wagon with 6spd sti swap(SEAN I FINALLY DID IT!) and stock sti turbo with other mods.
Mods Before Retune
Vf43sti turbo w/ 08 sti Top mount
Full Turboback
Walbro255lph
TUNE=283whp/335tq

Mods ADDED FOR RETUNE
Turbo inlet hose w/ AEM CAI
BCS
NGK PLUGS 1 step colder.
TUNE with all the mods listed = 305whp/356tq and 335whp/372tq on 95 octane mix

This retune consisted of just a Turbo Inlet Hose and AEM Cold Air Intake and 1 step colder plugs.

My previous tune pulled 283whp/335Tq without inlet hose and intake.

here is my new retune! let me know what yall think!!!



This show my 91 Pump #'s as well as my 95 octane Tune!

[Vettezuki]

Is that fall off in torque a function of the stock turbo? It's hurting your peak power quite a lot. You're making slightly more peak torque at lower revs than my H&C LSx makes, but considerably less peak HP, just because of the torque curve.

[WagonSleeps]

Yes our cars have good low end torque, AWD = lots of drivetrain loss.
but your car doesnt rev up to 7k i see.
All cars are different?

if you see my pump 91 octane run, the torque dies off, but my HP holds a good 300whp up to redline.


its a possibility the turbo doesnt act the way NA motors do, Because the torque drop you see is nowhere near noticeable, just likes to keep pulling.

Here is a dyno chart on a GT65 TURBO UPGRADED e85 BEAST Pushing 507whp and butt loads of torque.



as you can see the torque dies off on turbo upgraded cars also. The HP goes up, thats what matters in the end.


200whp/300tq against 300whp/200tq....which one would win????

Subarus have plenty of drivetrain loss, About 20% of loss.

305whp assuming i have 25% drivetrain loss would come out to 381 to the crank.
507whp assuming he has 25% drivetrain loss would come out to 633 to the crank.

[Vettezuki]

Originally Posted by WagonSleeps

Yes our cars have good low end torque, AWD = lots of drivetrain loss.

if you see my pump 91 octane run, the torque dies off, but my HP holds a good 300whp up to redline.

That's what I mean. Without sounding like a complete a$$hole, I've raced many STis and Evos at the track. The pull hard out of the hole then I walk right on by. Simply my engine continues to do more work (HP) where these motors flatten out fast. I'm talking about stock or moderately modded ones up to about your level. Beasts are beasts, different story.

its a possibility the turbo doesnt act the way NA motors do, Because the torque drop you see is nowhere near noticeable, just likes to keep pulling.

. . .

as you can see the torque dies off on turbo upgraded cars also. The HP goes up, thats what matters in the end.

Exactly. The HP would go up a lot more if the torque were more stable. This is a big part of the design in a turbo car, depending on application, where it will spend most of it's time (rev vs. boost), etc.

My point is that I think your car may have a slight breathing problem for the torque to fall off quite that rapidly. Probably a turbo size/effeciency issue. I've seen similar things on stock GX-P turbo pulls. But I've also seen turbos that go to high torque and stay there, which means a more linear HP curve up to red line.

Let me ping our resident turbo guru.

[SeanPlunk]

Originally Posted by WagonSleeps

Just wanted to show you all my new numbers after my retune.
its a 2007 wrx wagon with 6spd sti swap(SEAN I FINALLY DID IT!) and stock sti turbo with other mods.
Mods Before Retune
Vf43sti turbo w/ 08 sti Top mount
Full Turboback
Walbro255lph
TUNE=283whp/335tq

Mods ADDED FOR RETUNE
Turbo inlet hose w/ AEM CAI
BCS
NGK PLUGS 1 step colder.
TUNE with all the mods listed = 305whp/356tq and 335whp/372tq on 95 octane mix

This retune consisted of just a Turbo Inlet Hose and AEM Cold Air Intake and 1 step colder plugs.

My previous tune pulled 283whp/335Tq without inlet hose and intake.

here is my new retune! let me know what yall think!!!



This show my 91 Pump #'s as well as my 95 octane Tune!

Congrats - you finally did it

305/356 is stout for 91 octane

How hard was the tranny swap?

[WagonSleeps]

Originally Posted by SeanPlunk

Congrats - you finally did it

305/356 is stout for 91 octane

How hard was the tranny swap?

Thanks Sean!
replying to the post above me, i am probably having breathing problems, lack of turbo size and my itty bitty 2.5 magnaflow axelback which is restricting free flow.


the 6 speed swap went smoothly, better than i expected.

all the 6spd parts, plus some new seals, new tranny oil, and waaalaah!
my axles mate up perfectly!

let me know when your next drag event is, iam very interested.

[WagonSleeps]

Originally Posted by SeanPlunk

Congrats - you finally did it

305/356 is stout for 91 octane

How hard was the tranny swap?

Thanks Sean!
replying to the post above me, i am probably having breathing problems, lack of turbo size and my itty bitty 2.5 magnaflow axelback which is restricting free flow.


the 6 speed swap went smoothly, better than i expected.

all the 6spd parts, plus some new seals, new tranny oil, and waaalaah!
my axles mate up perfectly!

let me know when your next drag event is, iam very interested.

Also, did you happen to see the e85 gt65 subaru torque curves?
I can show you a Evo chart or Subaru chart and the tq curves drop.
2 liter turbo cars? possibly the reason why.

Here below is a evoX with some mods, protuned. stock turbo.
Torque drops, but HP CLIMBS! boost drops, but the power climbs! .......................




id probably run a freakin 14 sec since ive never been to the drag strip

[WagonSleeps]

Originally Posted by Vettezuki

Let me ping our resident turbo guru.

good idea.

[MassAppeal]

Its because the Subaru has crappy heads and the STi turbo is still to dinky

[WagonSleeps]

My tuners comments about this discussion

The reason TQ drops is 2 fold. 1-Boost drops. If you look at the dyno chart, boost and tq follow the same trend. 2-The subaru heads cannot flow for crap over 5500 due to the design of the ports. Evo on the other hand has better flow and with a turbo that can make flat boost to redline. It will hold TQ, but a V8 typically cant rev over 6-6500 where and evo can go to 9k+ and so can subies. Not to mention its HALF the displacement/Motor.