Originally Posted by bswilmington
I made 420 wtq all day long on 25-26 psi on VF39. I tuned it myself and there was no magic involved. IIRC timing was at 10 degrees at peak boost with 10.8-11.0 AFR. if he isn't cranking up the boost then he has to be adding timing and I would think he also changes AVCS.
10-4 on that! Jr. had my XTI with the VF48 making 450wtq and it made it by 3100. It was a ****ing rocket! A bit short legged but it got up to speed quickly!! LOL