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1998 Ford Cobra cylinder compression

Tiny
SMROD71
  • MEMBER
  • 1998 FORD COBRA
  • V8
  • 2WD
  • MANUAL
  • 50,000 MILES
I recently bought a used 1998 cobra mustang 4.6 dohc. The seler told me the engine was rebuilt. I would like to know what the compression test result should be for good cylinder compression, stock. Seller wasnt sure if the compression ration had been dropped or raised.
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Sunday, May 3rd, 2009 AT 8:48 PM

1 Reply

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
You won't be able to tell compression ratio by a compression test. But if your compression is around 120-150 p.S.I. You should be ok. Make sure you do it correctly and there shouldn't be a 20% variance between cylinders.
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Thursday, December 17th, 2009 AT 7:04 PM

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