[Kponti]

Originally posted by SaleenGTS
I don't know....I just don't see a two mph increase in those intakes....especially with the Stage 1 cam. I think he hay have had a better tune. The Holley is the only Intake that I have ever seen a 2 mph increase on. The Track Heat only flows 8 cfm more than the Street and the Holley flows 16.

Also, the Street Heat made 13 more rwhp with my car on the dyno than my old Cobra. Before the Blower and Stroker. I guess you could say it is all in the tune, but my timing and fp was the same with both setups. I also had a Stage 2 TFS cam. The Cobra has less CFM 220 versus 245, and the EGR on the Cobra is a bottleneck. I am not saying that the Cobra isn't a good Intake, it is just that I had phenominal gains with it.

Actually I think it was more of a 1-1.XX MPH increase. I never saw the time slip from his old run, he told me (before he even considered a 331 or an intake swap).
I also think your cam has something to do with it, think about it, your cam was 'rated' up to about 6200-6500rpm (not sure). I think it will make more power with a slightly better flowing intake than the stge 1 cam would. I swapped my cam for the AFM one before I got the intake. I honestly did not go much faster (if at all), but I have to blame my valve springs more than the GT40 intake I had. With the intake swap, I ran the #s in my sig.
Also I made that opinion on the Cobra cos I have heard time and time again on this very board that the GT40 does not make much more power than the Cobra and my 'guesstimated' comparism was with a GT40 unit.

Oh yea, on the matter of tune, he did not have any change at all. No dyno, timing (15deg) or fuel (42psi) change at all.

Disclaimer: I had clogged cats, and bad fuel filter, but those alone will not give me an increase of more than 5mph.