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Old 09-15-2009, 11:04 PM   #1
92hatchLX
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Default Compression for 5.0 HO

What are the stock compression numbers for a stock headed, stock sized gasket, stock piston and stroke 5.0 HO? Did a compression test tonight and I'm trying to see how my numbers compare to what they're supposed to be.
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Old 09-15-2009, 11:43 PM   #2
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Looks like my results are goofed anyways. I only let the motor warm up to about 160 degrees and I didn't have the throttle body wide open when I was cranking the motor. Any answers would still be appreciated.
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Old 09-16-2009, 12:08 AM   #3
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9 to 1 and close to 150 is good some may vary 130-140 depending on altitude
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Old 09-16-2009, 02:06 AM   #4
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Ya i got 135 ish to 140 ish, almost 200 000km. Runs good even though i beat on it.
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Old 09-16-2009, 08:41 AM   #5
92hatchLX
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9 to 1 and close to 150 is good some may vary 130-140 depending on altitude
I thought these motors were 8.5:1? Eh either way doesn't matter. I'm hoping for 150+ compression numbers after I re-do this when I get home. Depending on the compression numbers, I'll be order my Quarterhorse this evening or more 408w parts.
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1991, 50, 50ho, 5o, 90, cc, compression, cranking, ford, ho, mustang, piston, stock, stroke, test

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