Shelby73 Posted January 28, 2015 Report Share Posted January 28, 2015 Ok I have a 2009 GT500 with a Whipple 2.9 with 3" pulley, 72# injectors! Fore Inovations complete Returnless fuel system, Ford Racing Dual 65mm TB, JLT 127 mm CAI, 170 TSTAT, C&R HE with dual fans, AFCO Aluminum Radiator, extra large coolant tanks, ARR 1 7/8 LTH with high flow cats, Magnaflow cat back exhaust, McLeod RXT, Dynotech aluminum drive shaft, 3 73 gears, sub frame connectors and rear end girdle. Was thinking of putting a IW 10" OD pulley on her this spring. What do you think? Anyone running a similar combo? Was thinking this would be the end of HP mods till I have the engine rebuilt by L&M. Thanks for all your thoughts and inputs. Mark Quote Link to comment Share on other sites More sharing options...
Secondo Posted February 6, 2015 Report Share Posted February 6, 2015 Hi Mark, I'm not at that level but your car is a beast! You must be pushing in the 750whp range or higher with those mods. I wouldn't add more until you have the motor rebuilt. If you really want more boost, you could install the 2.8 supercharger pulley. I believe using the 10% o.d. crank pulley with the level you're at may stress the engine enough to break something. Quote Link to comment Share on other sites More sharing options...
2007red40thGT500 Posted February 6, 2015 Report Share Posted February 6, 2015 most guys go with a smaller supercharger pulley before swapping the crank pulley for the obvious reason of difficulty/cost. with all those mods something tells me you'll never be satisfied! Quote Link to comment Share on other sites More sharing options...
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