650+ hp......

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SPRSNK

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2.9L is bigger than I thought. Figured they would use the 2.3L. I won't be the first but I will be a customer for it. 650hp sounds like way too much for the stock bottom end.

Naw...we run 725hp on the stock dohc 5.4's all day long.
 

shayneshow

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I had a Whipple SC on my GM 8.1L (496 ci) which made 550HP & 850TQ... Needless to say, it got 8MPG on Super. No big deal....
 

WarSurfer

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I had a Whipple SC on my GM 8.1L (496 ci) which made 550HP & 850TQ... Needless to say, it got 8MPG on Super. No big deal....

What?!?!

You had a supercharged 496 that only made 550hp? My single carb 496 makes almost 700 on pump gas, over 1000hp on the spray. Did you have it de-tuned on purpose?
 

shayneshow

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To be honest, I dunno.... It was on a 2004 2500HD GMC with Allison Tranny. The thing hauled ass but I bought it that way. Maybe it was tuned for towing purposes... It wasn't a fully built race engine or anything.
 

WarSurfer

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Ah, that makes sense. Probably all stock except for the blower. I bet it'd pull a building down with all that torque.
 
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