Some say it helps a lot and some say it doesnt do much, what kind of HP/torque should I be expecting from a fine-tuned VAFC with i/e/h setup? Also I was told you need to re-set your ECU every once in a while to make the VAFC work functionally, any input will be appreciated, thanks!

 

I went from 193 RWHP to 202 with my VAFC, I was very impressed with the gains. My engine mods only include, Injen CAI, test pipe, J's N1 Exhaust

 

9 HP from the VAFC...very impressive!!

 

[QUOTE]Originally posted by ugotmade
[B]I went from 193 RWHP to 202 with my VAFC, I was very impressed with the gains.

 

A VAFC without some significant time on a dyno and a knowlegable tuner is not going to help a great deal. In fact you could end up leaning out your engine to much causing all kinds of undesireable results.

The problem I've seen with VAFC tuning, even with a dyno and a good tuner, is the lack of accurate Air/Fuel ratio measurments. Sticking a sensor in the tail pipe seems to cause a bunch of drift in the readings.

To do it right, it seems like you need to weld a bung onto the exhaust upstream of the Cat and measure from there.

 

[QUOTE]Originally posted by xviper
[B]
Was this gain solely with the VAFC or are you including the Injen intake in the "before" and "after" numbers.