Thread: With a stroker motor with aluminum heads what is the compression ratio limit for pump
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Old 02-12-2026, 07:02 PM
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Jay S Jay S is offline
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Looks like a 433 XR from Comp, it has a lot of mid range, 9.5 to 10.5 is a good place to be. With that cam in a pump gas combo generally a bigger port will like the higher end of that range, the smaller the port will like the lower end of the range.

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