To start off once again, I'd like to give a very special thanks for Clark to coming out here and tuning some of these handicapped (I say handicapped cause good lord most of these STG4 cars came on the dyno with 230whp) out here in Houston. And thanks for Turbochargers.com for letting us use their Dynojet. Now on to the good part.
*Note*: Dyno graphs will come later when I figure out what format to put them in so the pic will show up. (Anyone with experience with this please PM me)
Big Turkey: Stock motor, stock tranny/clutch/flywheel, FP Green w/ 7cm housing and 6H wheel, TXS FMIC, UTEC with ECUtek reflash, modded stock injectors, GT-Spec GenII headers, Perrin BIGMAF and HKS DP with electric cutout
Pump gas (93oct): 310hp, 294ft/lbs of torque @ 21-22psi (Stopped tuning on pump gas halfway, reasons explained later) with 20 deg. of advance, AFR > 10.0:1.
C16: 399.3hp, 344.6 ft/lbs of torque @ 23psi! 28 deg. of advance, 12:1 AFR
The turbo is simply great. The car never knocked during the dyno event, and it was running pig rich. I never messed with the wastegate spring, so it was set on whatever PSI it was sent to me with. Which was about 1.6 kg/cm^2.. about 21-22psi. We had no way of turning it down.. and the car was too hot and it was already on the dyno and we were pressed on time. So we did a couple of pump gas pulls. The car made 310hp, 294trq @ 1.56kg/cm^2 (21psi) with 20 degrees of advance, with the AFR well below 10:1 on the dyno (I believe I saw 9.8:1 on the LM-1 once). We decided to stop because really wanted to push it on C16 and not 93oct. I'm going to have to go back and lean it out myself when I back the wastegate spring off a little bit.
On C16, the turbo really came alive. This time it was only boosting a little over 20psi. Weird. Clark started adding timing and leaning out the fuel. It made 335whp. He added another deg. of timing. It jumped up to 345.7hp, with AFR's at 11.4:1. Leaned it out to 11.8:1 and added another degree netted me to 360hp. We decided to take a chance and mess with the boost. We set it at 23psi and it held very nicely. It automatically jumped up to 390.7 with another 3psi of boost. That's insane. We both agreed that we had to cross the 400whp mark. We decided to leave boost alone and just mess with more timing and fuel because we were only at 11.8:1. Leaned it out to 12:1, added two degrees of advance, and it hit 399.3awhp. I figured it was close enough. With the bellmouth/diverted WG downpipe I would have surely hit it. And it was little bit humid.
I have a side note on the modded stock injectors. Without the flash, using the UTEC alone, we were seeing very high corrections. The day before the tune when I installed my injectors, and I had pull fuel out myself to make it home. On a cold start, it was seeing AFR's in the high 9:1 - low 10:1. It was nasty. It didn't want to idle, and it would shake violently. Clark flashed the ECU with ECUtek. In about 30 minutes we got it to idle perfect. Then we had another problem.. the car would peg out 8:1 on the LM-1 right at 4500RPMs when coming onto boost. It would buck back and forth. With the ECU reflash we got that running perfectly as well.. and the driveability is also perfect. I switch the UTEC switch to 0, and the gas mileage is the same as before, 320MPG to the tank. He used the UTEC to tune for power.. and the corrections were at around -4ish. It is a powerful combo like Clark said.. you basically have full control over just about anything.
The car runs perfect. Idle, cruise, no stumbling, everything is smooth and just like before. It just sounds very different.. the sound is much deeper.. it sounds like I have a huge cam in there. On the cold start as well, it isn't nearly as bad.. it'll start off around 13.5:1 then the ECU will slowly correct itself back to 14.7:1. Perfect.
Power is very very smooth. Peak power is at 6800RPMs, and the spoolup isn't bad at all. Clark saw 15psi @ 4100RPMs, and 23psi around 4500RPMs. It's a huge jump but not real sudden kick. But here's the kicker. I took someone out for a ride. 40mph roll.. 4200RPMs.. I eased the peddle to the floor. The front tires slipped a little bit, the rear grabbed traction and I was off. Right at 6800RPMs, right before the shift, BAAAAAAAAAAAAAAAAAMM! It shredded 2nd gear :lol: :lol: :lol: Talk about power. Oh well, what can ya do? All I did was laugh about it. It was bound to happen.. the tranny didn't stand a chance.
Okay now that my book is over on my car, here's some others:
tekkgod: stock motor/tranny, FP18g w/ 8cm housing, BPM TMIC, STi pinks, some diverted downpipe with a cutout.
Pump gas: 286hp, 257trq @ 17psi
C16: 334hp, 297trq @ 24psi
pegdrgr: SR40, JDM 6spd, STi pinks, APS 70mm intake, APS DR500 FMIC.
Pump gas: 288hp, 25? trq @ 17psi
C16: 332hp, 309trq @ 23psi
I will let them comment on the rest.
We had a couple more but I didn't get to see them, I will have their graphs in a couple of days. I know a STG4 w/ VF34 and FMIC car put down 293hp, 261trq on pump gas, 17psi creeping to 20psi. Not sure on the others.
DYNO GRAPHS WILL COME IN A COUPLE OF DAYS!
Thanks for reading