LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Who's gone .60 over?

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Old Nov 3, 2016 | 12:32 PM
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Default Who's gone .60 over?

Looking to see if anyone has gone .60 over. Did it run hot? Any other issues? I know people SAY .30-.40 is max and some SAY .60 if fine. Machine shop called and said they need to punch out .60 to get rid of the ridge. No sonic test has been done. I did search but but not to many people who have done it have weighed in. Maybe that is sign lol.
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Old Nov 3, 2016 | 01:51 PM
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I am at 60 over(not by choice) and boosted, so far no problems and it was a daily driver. I would be leary of going 60, at the time I couldnt find a block and had been waiting for a very long time to get mine complete out of the machine shop so I said F it. others may chime in, but I guess depending on the build you might be ok..
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Old Nov 3, 2016 | 03:32 PM
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IMO you are rolling the dice if you don't get the cylinders sonic checked if you're going with that size bore. If there is enough material then do it.
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Old Nov 3, 2016 | 04:01 PM
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I would find a stock donor block and have it .030 over
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Old Nov 3, 2016 | 05:51 PM
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Live dangerously, go 0.060, unshroud the valves more, and report results. Grab a 3.85" crank and be a 402.
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Old Nov 4, 2016 | 02:54 PM
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Well looks like no one down here does sonic testing so I think I'll wait for the motown block to go 400ci plus. I have and extra 96 iron head Lt1 in the car with a spun rod so that will be coming out to go to the machine shop.
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Old Nov 5, 2016 | 05:33 AM
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Hit up fergymoto or look for his ad in the classifieds, he's selling a bad *** LT short block, IIRC its a 396 for boost, don't quote me on that though.
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