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James R
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posted on 4th May 05 at 15:48 |
I'd say they are all a bit high, shoul dmake around 200-230 on a std engine,
sounds more like you are well in to the 11.5+CR range, which is no good for power.
check the cams are timed correctly, as 1 tooth out will affect the results lots, esp if you've reduce the over lap the engine has.
James.
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X 60RSA
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posted on 4th May 05 at 15:18 |
Just did a wet test on 2 and it shot off the scale which only goes upto 300psi! Looks like we have found the burning oil burning piston!
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willay
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posted on 4th May 05 at 15:09 |
acccorrrding to the haynes manual
"the difference in pressure between any two cylinders should be no more then 1.0 bar (14.5 lbf/inē). If the pressure in any cylinder is low, pour a teaspoon of clean engine oil into the spark plug hole and repeat the test.
If the addition of oil temporaily improves the compression pressure, this indicates that clinder bore or piston ring wear was responsible for the pressure loss. No improvement suggests that leaking or burnt valves, or a blown head gasket may be to blame"
[Edited on 04-05-2005 by willay]
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X 60RSA
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posted on 4th May 05 at 14:53 |
Just done a compression test, on my engine which i'm not whether its standard or not, anyway! Carried it out with the throttle open, makes any difference i'm not sure? Plus the engine was a normal operating temperature.
Starting at the cambelt end:
Piston 1 = 232psi
Piston 2 = 217psi
Piston 3 = 252psi
Piston 4 = 242psi
A little high wouldn't we say, piston 2 looks to be out on its own?
[Edited on 04-05-2005 by X 60RSA]
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