ls7 heads on a ls2/3 block
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On The Tree
Joined: Sep 2006
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From: Port Huron
ls7 heads on a ls2/3 block anyone ever run ls7 heads on a ls2/3 block? Ive set them on both blocks and the intake valves clear the bores. The exhaust valves cleared on the 6.2 block but hit on the 6.0 block. Small exhaust valves could fix this. Just wondering if anyone has ever ran this combo?
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Joined: May 2004
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From: St. Louis, MO
Big valve heads on small bore = bad flow and fill characteristics.
If you dont have a 4.030+ bore then I wouldnt bother with square port heads at all youd be better off with cathedral.
If you dont have a 4.030+ bore then I wouldnt bother with square port heads at all youd be better off with cathedral.
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Needs to be a 4.065 bore or larger for our heads. I would also not want to run these on a stock stroke LS3. It would kill a lot of low end that the stroker would really help pick up. If this is stock LS2/LS3 I would look pretty hard at our aftermarket casting LS3 heads. The 250 heads will flow as much as any stock casting ported with a 20-30cc smaller runner. Extra port velocity is pretty useful on those motors, as well as extra compression.
Thread Starter
On The Tree
Joined: Sep 2006
Posts: 156
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From: Port Huron
Needs to be a 4.065 bore or larger for our heads. I would also not want to run these on a stock stroke LS3. It would kill a lot of low end that the stroker would really help pick up. If this is stock LS2/LS3 I would look pretty hard at our aftermarket casting LS3 heads. The 250 heads will flow as much as any stock casting ported with a 20-30cc smaller runner. Extra port velocity is pretty useful on those motors, as well as extra compression.
Last edited by 1bad lad; Nov 13, 2012 at 02:29 PM.
Thread Starter
On The Tree
Joined: Sep 2006
Posts: 156
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From: Port Huron
