Originally Posted by Erik B
Type R came highley tuned if not maxed out from the factory. Hundred of thousands of hours were put into the well built and tuned motor you see in TypeR's. No need for a VAFC if your not bring in more fuel or air....just my 2 cents. :?
Actually Eric, the P73 ECU runs rich as shit and is, imo, not anywhere near tuned. You can make some decent gains for the money with a VAFC on a stock car. Nothing ground shattering obviously, and not the most peak for $300 compared to say a JDM DC-Sports 4-1 header and testpipe.. but still.
To answer Rgoose's question, each motor is different, tune it on a dyno with a wideband a/f meter.