Quote:
Originally Posted by Musclerodz
It now has a Nick Williams DBW102mm throttle body so with that and larger headers there is probably more power left in this beast.
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Thomson Automotive has done lot of testing on the headers and throttle body. Bigger headers won't increase the power, and the stock 90 mm throttle body is fine for LS3 418. I will be using Ultimate Headers 1 3/4" headers on mine, but Thomson Automotive tests their engines with stock corvette exhaust manifolds. I asked Brian about porting the tub, but it doesn't increase the power. Thomson Automotive rebuilt my engine, but the biggest increase was change to LS9 heads (same as Hellfire) and Cam. Mikels never tested mine at 15 psi, but it is in the plans. Hellfire uses a 90 mm throttle body. This is a great price for the engine.
Good luck with the sale
Jeff