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> Compression In Motor
dburmeister
post Nov 8 2008, 07:41 PM
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what is a good compression on my 87 conquest. I have 125 across the board. derek thanks
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seeker
post Nov 9 2008, 10:41 PM
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QUOTE (dburmeister @ Nov 8 2008, 07:41 PM) *
what is a good compression on my 87 conquest. I have 125 across the board. derek thanks


125 is not bad compression #'s, 150 new....
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dburmeister
post Nov 10 2008, 12:23 AM
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do you know what the compression range is. If 150psi is a new motor what's would be a bad motor. I'm having problems with my mechanic? thanks.
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BDperformance
post Nov 18 2008, 02:42 AM
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125# is low, 160# new/rebuilt. 140# is low as these cars will run with. more than likely
its your headgasket. perform a leakdown test, this is similar to a compression test
but the guage stays connected for about 5-10 minutes per cylinder. if no leak down ywn
is noticed your gasket is good. if a leakdown is noticed durring that time,bad gasket.


you didnt state the mileage on your car, that would also give us a better clue
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dburmeister
post Nov 21 2008, 12:53 AM
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QUOTE (dburmeister @ Nov 10 2008, 01:23 AM) *
do you know what the compression range is. If 150psi is a new motor what's would be a bad motor. I'm having problems with my mechanic? thanks.

89,000 miles, leak down has been done it's was good.
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86quest
post Mar 7 2009, 02:39 AM
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QUOTE (dburmeister @ Nov 10 2008, 12:23 AM) *
do you know what the compression range is. If 150psi is a new motor what's would be a bad motor. I'm having problems with my mechanic? thanks.


here is the full service manual for our cars. http://www.starquestgarage.com/

this link is the compression that ive found. idk if its different or not? http://www.starquestgarage.com/manuals/ser...09_-_engine.pdf and type in 14/56 and that will lead u to the comprression pressure
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piggylover1985
post Sep 30 2009, 08:19 PM
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Drives: 92 Stealth R/T TT, MBC,BOV, MAF-T, 3" SS straightpipe, Exedy clutch stage 3, evo rims.. 87 WB Starion G54B turbo, FMIC, 13psi, 1000cc injectors,MBC,BOV, 2-1/2 full exhaust, catless, MK1 hardpipe kit, 1G MAF, 3.90 rear end, 6 bolts axles and hub, serious weight lost. 95 Stang 5.0, 373 gears, Cobra T5, GThead, Explorer intake manifold & injectors, racing clutch, straight pipe, full body kit, racing hood, z3 fenders, custom burnt orange paint, CAI, Lambo doors kit. 20" chrome wheels, Eclipse DVD/Navigation w/ custom sound
usually if all of the cylinders compression test come out, and they're all within 10% different then it should be good, 89,000 is low for the year, but remember it's not all about the mileage, it's also how previous owner drive it, and how he treat the car too.
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