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01-26-2003, 04:03 PM
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#2 |
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Registered Member
Join Date: Sep 2002
Location: NYC
Posts: 245
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I've built engines but I'll admit I'm no machinist! lol Here's my 2cents anyway. Piston skirts are usually smaller than up at the top. If the bore is 30 over then you get pistons for a 30 over. They actually will measure smaller than the bore. They have to, if they were the same size you'd never get them into the bore. Plus you need room for thermal expansion. Did you mark everything when you tore it down. If you're using the same parts they're all broken in to their respective bores and need to go back the same way. As long as there is no scarring in the bores or on the pistons you should be able to just replace the rings, and bearings while you are at it. If they are worn, depending on how bad you might get away with just honeing them alittle.
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1970 Stang Conv: en:Boss351 (balanced/blueprinted) mech cam(240*@.050/.540 lift) Scrw in studs/comp cams rllr rkr Mldn valves 2.19in 1.71ex ported polished cc'd hrdnd ex Keith Black FT pistons(10.25/1) Weiand Excellorator manifold Holley700 DP mech 2nds MSD 6 box and Dis Headers/2 1/2 inch duels tr: modified FMX re:9-inch/3.89 limited slip |
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