454/330 Compression Ratio

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12-05-2006, 11:55 AM

MattBMiller

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454/330 Compression Ratio

What is the compression ratio on a stock carbed Merc Gen V 454/330?

Thanks!

12-05-2006, 02:57 PM

Pat McPherson

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Re: 454/330 Compression Ratio

About 8:1.

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Patrick

12-05-2006, 03:11 PM

Fenderjack

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Re: 454/330 Compression Ratio

I think 8.5-1 but it is for sure in the 8's.

12-05-2006, 03:24 PM

Cam-shaft

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Re: 454/330 Compression Ratio

330hp also known as 7.4l cr is 8.0:1
454mag is 8.6:1
502 mag is 8.75:1

Thanks Cam-shaft.

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