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Uneven compression in cylinders

Old Jan 26, 2011 | 06:20 PM
  #1  
balleronabudget's Avatar
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From: Owensboro, KY
Uneven compression in cylinders

I took the car to Majestic Motorsports today and had them do a compression test before I added new parts, since the car has 80,000 mi. They said that the pressure in the cylinders were 95, 110, 110, and 145. I don't know which specific cylinder each number was for. Anybody have an idea why this is happening? Rings? Injectors? The car runs great and pulls hard. I had no idea anything was wrong, except I'm only running high 12's.

Injen CAI
FP Green Turbo
TurboXS TBE
TurboXS FMI
Cosworth 272 cams
Perrin fuel rail
RC 760cc injectors
Walbro 255 fuel pump
Blitz EBC that I had a problem.
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Old Jan 26, 2011 | 06:21 PM
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mayberry's Avatar
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From: Pine Bush, NY
You never want a variation more than 10% from cylinder to cylinder. The shop should have done a leakdown test in the first place to figure out why there is such a difference.
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