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Generation IV Internal Engine 2005-2014 LS2 | LS3 | LS7 | L92 | LS9

How much can you mill L92's before Intake alignment issues?

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Old 11-23-2012, 12:15 PM
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Default How much can you mill L92's before Intake alignment issues?
Just wondering
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Old 11-23-2012, 12:28 PM
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I wouldnt mill ls3 heads past .045 period
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Old 11-23-2012, 12:44 PM
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0.045 is the answer and yes, Milling them beyond 0.045 is not recommended. Hurts the flow in the chamber. Also with such a large intake valve, it's hard to throw duration at a cam without flycutting.
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Old 11-23-2012, 02:34 PM
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My heads are cut .020 and the block is .025

ls7 gasket both the vic jr and mast intake fit fine

Tim
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Old 11-23-2012, 08:46 PM
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100thou, no porting, stock manifold (L76 manifold) still fit and lined up. made big hp with factory ls2 cam and e85. 11.3 in 3700 lb car at 122mph. fly-cut pistons, but actually could get away with it.
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Old 11-28-2012, 07:38 PM
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If the short block is stock then piston to valve clearance would be more of a worry then the intake lining up. Keep in mind excessive milling can hurt flow.
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Old 11-29-2012, 12:38 PM
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Angle milling? I took 20cc off my chambers and still line up with stock style intakes.
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Old 11-29-2012, 05:49 PM
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FWIW: Mine were milled .030 originally and Richard did a couple thou cleanup pass when he ran the Stage 3 program through them. The block was also cleaned up a few thou when the Darton liners went in.
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