A little background here..

In 2007 I bought a brand new WRX. It took a couple years but the turbo was stock and I used a variety of bolt ons, including a six speed swap because the 5 speed bit the dust. When i got her tuned at EFI logics, (rip chris) I put down 323 ftlbs and 241 hp on a mustang..

fast forward to 2012-2013 I now have owned my evo for about 3 years and I dont get the same thrill from this car as i did my subaru even though the HP is probably 50% greater. Im trying to get back some of my beloved torque.. My hardparts list as follows

Skunk2 intake manifold ported by STM

Full Blown 70mm cast throttle body

S2 cams

Hta71 Forced Performance

84mm intake

3in straight thru exhaust no cat

Muse o2 dump

---------

Now, I have two hunches maybe 3.


first of all my skunk 2 manifold that stm claims is the best performance set up once they port it. I believe this is with top end favored set ups. Although no one ever described a major loss of torque with it. I beleive even curt brown liked this manifold..

second hunch is the s2 cams. but once again people have been saying theres no appreciable loss in spool/toerque with these.

thirdly, its the 10.5 hotside. The HTA 71 uses a stock turbine wheel so I dont consider that a threat to my low end by any means

I have a stock intake manifold and throttle body that i could replace any time, but I dont have a dyno with in 2.5 hours .. STM. I also dont have my stock cams any more nor the stock turbo. So Ive been contributing my loss thus far mainly to the manifold but.. Im looking for a little help because Im not making square torque/hp. and oversquare is whant I want.

Yes I appreciate the fact my subaru was a 2.5l and now I own a 2l.

 

Have you lost torque after installing these parts or is this in comparison to the Subaru?

 

So what does the evo make HP/TQ

 

The 2.5 ltr engine helps alot , as two of my friends have wrx's that were tuned at efi logics. The wrx's and sti's have always seemed to be torquier engines and thats what your feeling, but once you get your evo moving hows it feel ? That hp will win out in the end. I always felt for some reason that Subaru's always had better #s on their dyno then evo's, but my car on its old setup was faster than my friends wrx's. What were your #s on their dyno?

 

Not directly comparing to the subie: My hp/torqe when from 400/400 [with fp white hks 272] on VD dynojet to barely over 350/430 same settings.

The changes made here are the Skunk2, FB tb, and the S2 cams, STM UICP and I think thats it.

Ive been thinking to go with a CBRE extreme stocker.

Ive had my car at STM on the dyno before the list of mods and I think it was around 306/326 or something like that. that was an OG FP white, HKS 272 hallman and TBE self tuning..

Ive always liked to autocross and I think that where Im at now is gonna suck in the tighter courses.

 

So is the 350/430 done on efi logics dyno? If so that 430 for torque seems like alot for their mustang dyno. Yeah when you autox the torque is a nice thing to have. Where those dyno # you mentioned for the subie for a tuned/modded setup and did you have your evo tuned there? Would you post a dyno graph for evo?

 

No the evo is road tuned by me. I'm only comparing that to the subie to say I like torque

Vd = virtual dyno

Sorry that's backward I listed as torque / hp when most go the other way.

430 hp 350 torque with skunk 2 s2 etc
400 400 with hks cams and stock intake mani

 

Yeah I knew what Vd means as many people who self tune or get remote tuned flashes use this and basically when used correctly it has seemed to produce #'s on par with dynojets. I agree with you that maybe it is the skunk intake manifold, with 71 hta turbo and ported stock intake manifold I have always seen very square results hp/trq with maybe the hp being a little higher than the trq. If you have the stock intake manifold give that a try and just use Vd, you made 400/400 with the fp white /hks cams to use for comparision. I think the s2 cams have little to nothing to do with the torque loss as they usually just shift the torque up the power band a little, but a 50 ft-lb peak torque loss is hugh.

 

I realize that I have a one track mind but, have you tried adjusting WG spring pressure right up to your peak boost target level? This tends to fatten up the powerband at least in the midrange, Ratty.

 

If it helps, from Curt's site:

"On my car 50whp and 40#'s of tq were gained at 4500rpm over the Skunk2 and still made 3whp more up top, this was at 28psi on 93 on a MD and a Red."

It's what I run and seems to be the best of both worlds in terms of top end and low end torque.

 

Awesome, just awesome!

 

Too much boost creep from limited wga arm travel if I do that.

 

Emailed him, gonna sell my skunk 2 hopefully for enough to cover porting from cbre

 

I just sent in an intake manifold to Curt for a new project car I'm building. I'm also shooting for lots of torque.

 

The extra 1/2 liter helps out ALOT! My buddies swapped RS with an EVO III hit full boost at the same time as I did with a stock DSM turbo!