compression ratio

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Mar 14, 2004 | 12:39 AM

bigblocksix

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From: vancouver bc

compression ratio

hi everyone, im rebuilding an 86 351w that i want to run on regular 87 octane gas, should i stick to stock replacement pistons or move up to flat tops? just wondering if it would ping like crazy with flat tops and regular gas

Mar 14, 2004 | 06:51 AM

TheWiz427

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From: Woodruff, SC

If your just rebuilding for general use i would stick with stock pistons and you should'nt have any problems.

Last edited by TheWiz427; Mar 14, 2004 at 06:54 AM.

Mar 14, 2004 | 11:13 AM

bigblocksix

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From: vancouver bc

well for this rebuild i want some more power so its gonna have home ported heads, three angle valve grind, comp 265 DEH cam. im still wondering what pistons to use, i know flat tops will give me more power but im thinking they might bump the compression up to much and make it detonate on 87 octane gas

Mar 14, 2004 | 07:05 PM

TheWiz427

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From: Woodruff, SC

I have flat tops in mine and late model heads(pretty much stock except heads)I run the mid grade which is 89 and don't have any problems but if i go to 87 it will ping a bit.

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