Originally Posted by distantpulse
Brian,
That sounds logical. Correct me if I am wrong, but I remember reading Chitown's thread "how to build a fast crossfire" and after he installed the NW intake and 178mm pulley he then got the ECU tuned by Inmotion. I believe there wasn't a huge difference in ET and MPH after the tune. So i was just wondering what the deal was with these tunes.
Not sure about Chi-Town tune results, but Chi did a Dyno run before he sent his ECU to InMotion and his A/F ratio from the factory was around 12.5 which is very good.
My A/F ratio from the factory was 10.5 - way to rich, even with the pulley installed - this was robbing me of HP so for me the ECU tune was a good thing.
Plus it raises your RPM limiter, SC engauge, and Speed limiter so you can hit 190 mph on the Texas mile........