Just added a CAI, 2.6" blower pulley, colder plugs, and a tune. The power difference is incredible! Now if I could just get a nice day in Syracuse to drive....
Hello- what year Shelby and what base rwhp and after. If 2010, did you upgrade the CAI and did you think about a larger throttle body?
Its a 2008 GT500. Haven't dyno'd yet. Package states a gain of up to 120 HP but i would say a definite gain of 70-80. Much higher boost now than stock and really getting a nice whine from the blower now. Its a nice package for the street without getting too radical.
I had a 2.6 pulley w/tensioner, sparks and SCT custom tune at local speed shop for my 2010 GT Shelby. Am not to happy w/ dyno results. Base w/o mods showed respectable 472 RWHP before, and 502 after. I run 93 octane from Walmart to keep cost down. Perhaps this is the problem. The performance on the road however sure seems much graeter than the 30 RWHP gain. I switched to Shell's 93 and the performance is awesome. What gives? The custom tune by the shop's owner is somewhat confused too. He thinks I need a larger throttle body (stock is dual 60 mm; he wants 65 mm or greater). I realize more air means more fuel meaqns more power. Pundits on this forum feel that the TB and CAI are not limiting with the 2010 changes Ford's SVT made to this system. He also feels that I need a higher performance CAI w/o resonator (perhaps restricting- resonator delete) and a larger intercooler. Nobody else recommends this at this level of change, ie smaller pulley. Maybe I need an alternate tune say from Evo or Justin. Any comments are appreciated. Minnesotalee
I put the same package in my 08 Snake...along with a Dynotech DS...highflow Plenium...ran a Dynojet dyno at 520 RWHP the first run...made a small change to the A/F mixture and added a couple points of timing along with heavy icing the intercooler tank...made 547...it rocks! According to Brenspeed...a larger TB is not needed until boost is at 15 lbs...I have hit close to 14...
