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Old 12-27-2003, 01:44 PM
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Wink LT-1 Piston-to-wall clearence

Hi Everyone,

I am a new member and I am currenctly rebuilding my 94 Z-28. I have been tinkering with engines for a few years, this is my 6th or 7th rebuild and I want this one to be done the right way. I am trying to find out the correct piston to wall clearance. The engine is a standard bore and the cylinders look very good and should only need a light honing. I am using Speed Pro cast pistons ( trying to keep it under buget). I have looked in all my manuals, on line and I even called the dealership to find out the answer, still no luck.. Thanks in advance for your time.

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Old 12-27-2003, 03:23 PM
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You need to check with Speed Pro for the correct clearance. The pistons expansion is important, not the cylinder wall. Cast pistons, forged pistons, and hypereutectics all expand different amounts.
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Old 12-27-2003, 08:19 PM
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Wall clearance is determined by piston type as touched on above. When you do a rebuild, the piston manufacturor will account for the proper clearance given that the machinist gets the bore correct. It is very important that the cylinders are a true .030 over bore, for example, instead of .031 or .029.

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