dyno results seem wack!
While I'm sure it's possible, I'd be surprised to see 100 rwhp missing due to a tune.
I haven't messed with tuning the LS1, but it's a MAF based car and usually you can tell by the MAFv how much air the motor is using, which is related to HP. If that is way off of where a 450 RWHP car would be, then you would know if the motor is really making the power or not, and not the dyno being wack.
My money is still on the cam being a tooth off.
check your plugs, fuel psi and so forth
sometimes it could be the dumbest ****
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