Quote:
Originally Posted by 1_2Many
So you're running 16.5 lbs of boost on a stock motor? That's almost hard to believe, but if it is true that's awesome.
I hate to say it, but I do not believe the LS3 could handle 16.5 lbs of boost with stock internals.
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Yes. Actually, the stock GT500 5.4L engines will support upwards of 23lbs of boost without issue (keeping the RPM's under 6250, that is, the stock connecting rods don't like much more rpm than that), but you're not going to be able to run at those levels on pump gas. With a little 116 leaded race fuel and the 2.5" pulley on the car, it will make over 800rwhp. This is not a guess, this has been done many, many times already and if you visit some of the GT500 specific foums on various websites, you can get all the proof you need.
Personally, I doubt my car will ever see a pass with the 2.75 or 2.5 pulley on it, but at least I know it's in reserve if I ever need it.