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I just bought a 2012 GT 500, an the first thing I did was change the SC pulley to a 2.5 VMP pulley, installed new MSD coils, and a fresh custom tune be John Lund. OMG what a difference!!! I'm on a waiting list to get it on a Dyno, and was wondering if anyone out there would have an idea of the hp I just added to the stock 550 hp?
Welcome to the forums, congrats & good luck with the new ride.
The 550 hp was @ the crank, unless you base-lined it before mods, no way to know.
My stock 2011 did 481rwhp.
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Welcome to the forums, congrats & good luck with the new ride.
The 550 hp was @ the crank, unless you base-lined it before mods, no way to know.
My stock 2011 did 481rwhp.
.
Thanks!! 481 rwhp is about what I found in other post, so that's what I'll base the increase on. It takes 4-6 weeks to get an appt for the Dyno, and I didn't want to wait, to do the upgrades. I'll post the results when I get in.
New Shelby owner
