my compression test
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my compression test
i tune the car, its not making any power more than 570 to the wheels.
any thing more than 16psi is a waste.
power is dropping from 5500 RPM
i checkd the timing, and the cold lash for the rockers its normal
then, i did a compression test.
it was really reallllllly bad
1 = 95
2 = 91
3 = 91
4 = 85
5 = 91
6 = 91
the engine temperture is normal, but its overheating
the overflow tank is allways full with dirt
ill start all over again and rebuild the engine
im not sure how this is happend, bad luck with my darton sleeves.
N E way, i just like to share with u guys
Last edited by SmallTuner; 07-15-2009 at 12:45 PM.
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then
fuel pump fuse is removed, injectors discconected, coils are removed.
throttle is open.
cancking 4 to 6 times.
and thats it. i used a compression test guage.
this is one of the runs, no need to tune more than that its a waste.
Last edited by SmallTuner; 07-15-2009 at 02:41 PM.
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Do a leakdown. I think your numbers are way too consistent for such low numbers.
Then also do a compression and crank 5 times and then 10 times and see what you get.
Compression with 9 to 1 pistons should be around 150ish on this engine.
Lastly, pull your engine apart if the numbers are bad and check the deck heights on the mating surface to the heads and then on the mating surface on the sleeves and see if there is a difference. Good luck with everything.
Then also do a compression and crank 5 times and then 10 times and see what you get.
Compression with 9 to 1 pistons should be around 150ish on this engine.
Lastly, pull your engine apart if the numbers are bad and check the deck heights on the mating surface to the heads and then on the mating surface on the sleeves and see if there is a difference. Good luck with everything.
Last edited by JTinFL; 07-15-2009 at 04:16 PM.
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first, i run the car for 6 minz to reach normal temperture.
then
fuel pump fuse is removed, injectors discconected, coils are removed.
throttle is open.
cancking 4 to 6 times.
and thats it. i used a compression test guage.
this is one of the runs, no need to tune more than that its a waste.
then
fuel pump fuse is removed, injectors discconected, coils are removed.
throttle is open.
cancking 4 to 6 times.
and thats it. i used a compression test guage.
this is one of the runs, no need to tune more than that its a waste.
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Quick and easy way to see if its block related. Take a few drops of trans fluid, squirt it in before connecting the gauge, then crank again. If the #'s shoot up, your issue is in the block. If the #'s stay the same, the issue is in the heads
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It doesn't.. I am curious to know if that motor let go at 5750rpm on that dyno pull causing the drop in power and poor compression numbers (still weird they are so consistent), or if it will consistently draw that same curve producing over 500tq and something strange in high rpm. If it can keep doing the same exact curve it leads me to believe there is something else going on.
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I watched a guy do a compression test on a car with two different gauges being broken. Then the third one ended up being correct.
Also, some people will argue how many times you are supposed to let the engine turn over during the test, as long as you are consistent across the board then you can find a weak cylinder.
Also, some people will argue how many times you are supposed to let the engine turn over during the test, as long as you are consistent across the board then you can find a weak cylinder.