Well guys I decided to change a couple things on the S4 to try and get a little bit more power out of it.So I took the car back over to All Aspects in Chesapeake. Some of you may have seen my last run that yielded 398 whp and 440 wtq with 10.5 AFR's on my 104 tune. Here's the scoop on the setup:

2000 Audi S4 w/ APR full Stage 3 kit

plain RS4 KO4's at 23 psi tapering to 21 by redline
APR Stage 3 ECU
APR 2.5" catless downpipes
APR 3" SRT Exhaust
APR Intercoolers
Hallman ES MBC
SPEC Stage 3+ clutch
Fidanza Flywheel

Keep in mind this is with 80 degree air temps in the shop. I only picked up about 10hp but my torque went up quite a bit. These runs were on my 104 octane tune. Could have run it out to about 25psi but just decided to leave it where its at right now. Pretty much perfect 11.8 AFR's all the way across. I'm hoping to get another 25whp out of it with the electronic exhaust cut outs. All in all it doesn't make tons of horsepower but the powerband makes this car sooo fun to drive. When torque drops off I have 400whp all the way to redline. Never stops pulling especially in 5th gear.

 

Nice numbers man.

 

Very cool, I'm thinking about doing Meth injection. Do you have any knowledge on it.

 

Nice, but how often do you have to clear codes to get out of limp mode due to the MBC causing deviation DTCs?