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hp on a iron block 5.3 with ls2 heads and stock ls2 cam???

Old 09-11-2010, 09:43 PM
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Default hp on a iron block 5.3 with ls2 heads and stock ls2 cam???

I just scored a set of ls2 heads with yellow valve springs and a stock ls2 cam for my 5.3 with an ls1 intake.what would be a est on the hp this combo would put out???
Old 09-12-2010, 01:35 AM
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Anybody
Old 09-12-2010, 09:10 AM
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What compression?
What throttle body?
Headers or manifolds?
stock PCM or performance tuned?
Rear wheel or engine HP?
Old 09-12-2010, 11:07 AM
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Stock f-body tb.
Mild ecm tune.
Ls2 stock headers.
Rear wheel hp.
Dont know compression right off hand.
Old 09-12-2010, 08:03 PM
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315rwhp
Old 09-12-2010, 08:30 PM
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Default 5.3l with ls2 heads n cam

if my memory serves me correctly, a 5.3l will not work with those ls2 heads unless the 5.3l block is overbored. an ls2 is a 6.0l and the heads need an engine with at least a 4 inch bore. rite? i could be wrong.
Old 09-12-2010, 08:30 PM
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didn't think you can put L92 (4" bore) heads on a 5.3L block...
Old 09-12-2010, 08:52 PM
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You can't!
Old 09-13-2010, 06:25 AM
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Originally Posted by dec010974
if my memory serves me correctly, a 5.3l will not work with those ls2 heads unless the 5.3l block is overbored. an ls2 is a 6.0l and the heads need an engine with at least a 4 inch bore. rite? i could be wrong.
Ls2 heads will work on a 5.3 they are 243 castings. You are thinking of the L92 heads
Old 09-13-2010, 05:08 PM
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Thanks kdavis
Old 09-13-2010, 05:55 PM
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What would be the resulting compression ratio?
Old 09-13-2010, 06:08 PM
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However, I remember reading that an ls2 cam can't be used in a gen3 engine. Something about the rear cam sensor. Might wanna check up on that in the gen3 internal section
Old 09-13-2010, 08:33 PM
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Will do......
Old 09-13-2010, 10:19 PM
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you should be able to use the cam but i think youll need to get a gen 4 timing cover a block off plate for the rear cover. or something like that. might not be able to but i tihink you should be able to with some more customizing than you were already going to. again not 100%


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