As you know, I recently added the following items under the hood:
- Perrin TMIC replaced STi TMIC
- Samco turbo inlet replaced stock inlet
- AEM cold air intake replaced stock intake
- installed turbo blanket and Grimmspeed AOS
I replaced the TMIC first and I immediately noticed an improvement in throttle reponse. This makes sense as the Perrin has less pressure drop through it.
I then replaced the stock turbo inlet with the Samco, and maybe I felt a difference in throttle response (but maybe I didn't), in any case it was not significant like the TMIC.
Last week, I installed the AEM CAI and that too made a difference in throttle response, and some improvement in the higher RPMs as well.
Today, I returned to EFI Logics for a retune and here are the results - I gained 20 WHP but lost 16 ft./lbs. of torque at peak. Here is the dyno graph that tells the whole story;
Even though I lost 16 ft./lbs. of torque at the 3300 RPM peak, I gained torque from 3500 RPM all the way to redline, where I was up 23 ft./lbs.
WHP gain began at 3700 RPM and opened up by 5000 RPM for the 20 WHP gain at redline.
Maximum boost went from 19.3 to 20.2 at 3300 RPM and from 14.3 to 16.6 at redline.
Injectors are maxed out at 98%, but A/F ratio is maintained at around 11:1. I could gain a bit more with bigger injectors, but I won't do that until (or if) I upgrade the turbo.
With the revised throttle mapping that Chris uploaded last year in combination with these hardware upgrades and new tune, the car is really a pleasure to drive. Power delivery is smooth and very manageable. In all honesty, it feels much stronger than the dyno numbers indicate.
So I think I will drive it and enjoy it for now, until I decide I would like to do the polka...
- Perrin TMIC replaced STi TMIC
- Samco turbo inlet replaced stock inlet
- AEM cold air intake replaced stock intake
- installed turbo blanket and Grimmspeed AOS
I replaced the TMIC first and I immediately noticed an improvement in throttle reponse. This makes sense as the Perrin has less pressure drop through it.
I then replaced the stock turbo inlet with the Samco, and maybe I felt a difference in throttle response (but maybe I didn't), in any case it was not significant like the TMIC.
Last week, I installed the AEM CAI and that too made a difference in throttle response, and some improvement in the higher RPMs as well.
Today, I returned to EFI Logics for a retune and here are the results - I gained 20 WHP but lost 16 ft./lbs. of torque at peak. Here is the dyno graph that tells the whole story;
Even though I lost 16 ft./lbs. of torque at the 3300 RPM peak, I gained torque from 3500 RPM all the way to redline, where I was up 23 ft./lbs.
WHP gain began at 3700 RPM and opened up by 5000 RPM for the 20 WHP gain at redline.
Maximum boost went from 19.3 to 20.2 at 3300 RPM and from 14.3 to 16.6 at redline.
Injectors are maxed out at 98%, but A/F ratio is maintained at around 11:1. I could gain a bit more with bigger injectors, but I won't do that until (or if) I upgrade the turbo.
With the revised throttle mapping that Chris uploaded last year in combination with these hardware upgrades and new tune, the car is really a pleasure to drive. Power delivery is smooth and very manageable. In all honesty, it feels much stronger than the dyno numbers indicate.
So I think I will drive it and enjoy it for now, until I decide I would like to do the polka...