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With a stroker motor with aluminum heads what is the compression ratio limit for pump
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02-13-2026, 06:15 PM
Dragncar
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Join Date: Mar 2004
Location: Humbolt County California
Posts: 9,233
10.5 and never look back. I would go higher but I pay attention to things.
Butler used to put out engines with 9.9- 1 CR. Jim told me it gave some room for guys who did not keep up on their engine or did not know a lot. He did not want complaints.
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