Originally posted by RazMan:
I'm still a bit confused regarding sizes - If the stock 60mm SVT flow at 4000FPM velocity is around 96.94 CFM and the optimized 60mm SVT flow at 4000FPM velocity is around 109.17 CFM, why is a stock 65mm not as good when it will surely flow about the same as an optimised 60mm?



Because of the throttle plate/overall diameter of the 60mm vs 65mm.
65mm > 60mm optimized.
65mm is too much unless FI or 3L.


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