I have the KenneBell 2.6L w/ 4" pulley on my 07 GT and want to run a smaller pulley for the classic "whine" can I do this with just swapping out the pulley/belt and re-tune to keep w/in a safe power band( what I'm currently running right now 450hp/411tq)? I want to go down to the 3 3/8" if thats feesible.
Yeah the only whine you might get is the sound you make when you blow that motor.
The problem with tuning down for a smaller pulley is it will most likely leave you rich and give you some problems.
Best to build that bottom first before you swap any pulleys on that KB IMHO.
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Yeah, its got a three speed. Fast, Faster, and Hold on! 10.30 @ 131 in the 1/4 6.6 @ 110 in the 1/8 1.5 60''''''''''''''''''''''''''''''''''''''''''''''''''''''''
Ooooh and Yeah, it ain't gonna whine with a smaller pulley either. Sorry.
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Yeah, its got a three speed. Fast, Faster, and Hold on! 10.30 @ 131 in the 1/4 6.6 @ 110 in the 1/8 1.5 60''''''''''''''''''''''''''''''''''''''''''''''''''''''''
the shop who installed my kit said that its bec or cold air intake kits are sooo long .. dont know if its true but the whipple has a short cold air .. and ours is like a billion feet long
Old thought but, after seeing so many threads of blown motors above 12psi on a twin screws on there and other forums. Plus how people have seriously hated their experience with FI motors above 500hp and daily driving. I think this is one time I'm going to forgo the learning from experience and go off the advice and experience of others.
The 450hp mark is plenty!! And having quieted down the exhaust, plus the going back to a more stock look has made me much happier!!
Love the upgraded Steeda Q650 suspension/chassis package though!! :)
Right now I'm tuned for 10.5psi at ~11.5-11.9 A/F, I can't remember the timing but Its prob. low teens from what I remember. And at WOT I can see my boost guage tickling 11-11.5psi. I'm going off of fear here that with my current tune, a pulley swap=blown motor. I don't want to re-tune either. I think its spot on for me and my wants. And after the stock H-pipe and cats go back on, I'm sure I'll hear that whine again :). Though I'm sure AFTER the car is paid off, that my tune, so-to-speak, will change. Good info though and if I get froggy I'll do the swap (w/ or w/out a tensioner?) plus the retune.
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KenneBell pulley ? - 
Good info though and if I get froggy I'll do the swap (w/ or w/out a tensioner?) plus the retune.
