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RE: Help! compression ??'s

By Jim - 02/24/2002 12:25:49 PM; IP 68.57.105.61

That's what I recently did with mine. I don't recall how much we cut out of the piston top, but you can do the math for yours. A picture is attached. It's not a great view but it will give you an idea. I may have one from my 35mm collection that is better that I can send if you need it.

BTW: My engine is a 428 CJ. The pistons are 0.020 over. We dropped the compression to 9.5:1. don't forget to change the exhaust valve seat and valve to a hardened material to deal with lead free gas.

Jim

[Image edited for size, by Admin.]

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Collapse <a href=../ForumFE/reply.aspx?ID=11616&Reply=11616><img src=../images/reply.png width=30 height=10></a> <a href="#" id="anchor11616" onclick="return false;">Help! compression ??'s</a> -- <font color=#0000ff>Robbie, <i>02/24/2002</i></font><script type="text/javascript">
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Help! compression ??'s -- Robbie, 02/24/2002

Collapse <a href=../ForumFE/reply.aspx?ID=11617&Reply=11616><img src=../images/reply.png width=30 height=10></a> <a href="#" id="anchor11617" onclick="return false;">RE: Help! compression ??'s</a> -- <font color=#0000ff>Bob, <i>02/24/2002</i></font><script type="text/javascript">
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RE: Help! compression ??'s -- Bob, 02/24/2002

Collapse <a href=../ForumFE/reply.aspx?ID=11618&Reply=11616><img src=../images/reply.png width=30 height=10></a> <a href="#" id="anchor11618" onclick="return false;">RE: Help! compression ??'s</a> -- <font color=#0000ff>Robbie, <i>02/24/2002</i></font><script type="text/javascript">
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RE: Help! compression ??'s -- Robbie, 02/24/2002

RE: Help! compression ??'s -- Jim, 02/24/2002

RE: Help! compression ??'s -- Bob, 02/24/2002

Collapse <a href=../ForumFE/reply.aspx?ID=11623&Reply=11616><img src=../images/reply.png width=30 height=10></a> <a href="#" id="anchor11623" onclick="return false;">Factory spec was 10-10.5 See this page...</a> -- <font color=#0000ff>Mr F, <i>02/24/2002</i></font><script type="text/javascript">
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Factory spec was 10-10.5 See this page... -- Mr F, 02/24/2002

Collapse <a href=../ForumFE/reply.aspx?ID=11625&Reply=11616><img src=../images/reply.png width=30 height=10></a> <a href="#" id="anchor11625" onclick="return false;">RE: Factory spec was 10-10.5 See this page...</a> -- <font color=#0000ff>Bob, <i>02/24/2002</i></font><script type="text/javascript">
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RE: Factory spec was 10-10.5 See this page... -- Bob, 02/24/2002

Collapse <a href=../ForumFE/reply.aspx?ID=11627&Reply=11616><img src=../images/reply.png width=30 height=10></a> <a href="#" id="anchor11627" onclick="return false;">RE: Factory spec was 10-10.5 See this page...</a> -- <font color=#0000ff>Robbie, <i>02/24/2002</i></font><script type="text/javascript">
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RE: Factory spec was 10-10.5 See this page... -- Robbie, 02/24/2002

RE: Factory spec was 10-10.5 See this page... -- Bob, 02/24/2002

Collapse <a href=../ForumFE/reply.aspx?ID=11633&Reply=11616><img src=../images/reply.png width=30 height=10></a> <a href="#" id="anchor11633" onclick="return false;">10-10.5 is a workable range w/ premium fuel. [n/m]</a> -- <font color=#0000ff>Mr F, <i>02/24/2002</i></font><script type="text/javascript">
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10-10.5 is a workable range w/ premium fuel. [n/m] -- Mr F, 02/24/2002

Collapse <a href=../ForumFE/reply.aspx?ID=11634&Reply=11616><img src=../images/reply.png width=30 height=10></a> <a href="#" id="anchor11634" onclick="return false;">RE: 10-10.5 or 11.1 w/ premium fuel.</a> -- <font color=#0000ff>Ray, <i>02/24/2002</i></font><script type="text/javascript">
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RE: 10-10.5 or 11.1 w/ premium fuel. -- Ray, 02/24/2002

RE: 10-10.5 or 11.1 w/ premium fuel. -- Ray, 02/25/2002

Collapse <a href=../ForumFE/reply.aspx?ID=11641&Reply=11616><img src=../images/reply.png width=30 height=10></a> <a href="#" id="anchor11641" onclick="return false;">RE: 10-10.5 is a workable ,also PCV?</a> -- <font color=#0000ff>Robbie, <i>02/25/2002</i></font><script type="text/javascript">
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RE: 10-10.5 is a workable ,also PCV? -- Robbie, 02/25/2002

Collapse <a href=../ForumFE/reply.aspx?ID=11647&Reply=11616><img src=../images/reply.png width=30 height=10></a> <a href="#" id="anchor11647" onclick="return false;">OK..you did not mention it...</a> -- <font color=#0000ff>kevin, <i>02/25/2002</i></font><script type="text/javascript">
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OK..you did not mention it... -- kevin, 02/25/2002

Collapse <a href=../ForumFE/reply.aspx?ID=11668&Reply=11616><img src=../images/reply.png width=30 height=10></a> <a href="#" id="anchor11668" onclick="return false;">"Platinum is a no-no"...please elaborate...</a> -- <font color=#0000ff>Dan Davis, <i>02/25/2002</i></font><script type="text/javascript">
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"Platinum is a no-no"...please elaborate... -- Dan Davis, 02/25/2002

RE: "Platinum is a no-no"...please elaborate... -- kevin, 02/26/2002

RE: 10-10.5 is a workable ,also PCV? -- Ray, 02/25/2002