so I did a compression test on my race motor that I built a couple of years ago. The motor never ran like I thought it should have my best time was a 12.8 at 110mph. The motor is a 355 flat top with 10.5 to 1 comp. trickflow super 23 heads, comp xe284h cam, victor jr intake, 750 demon, msd pro billet and 1 3/4 long tubes open. The transmission was a th350 with a 3000 stall and 4.10 gears in a 3000 pound car. I allways thought that it should have put the car into the mids 11's but I was like well maybe im wrong. I have been getting the motor ready for this season so i decided to do a compression test oin the motor and #1 hole came in at 30 psi while 4 others came in at 180psi then I was so pissed that I quit testing at that point and the headers got in the way. I tested the rocker arms to make sure one wasnt to tight, they were just right, then i watched the cam to make sure it wasnt flat, nope it moved the rockers just fine. So now im all sad, and I dont get it the motor doesnt smoke at all so I dont get how it could be the rings. PLEASE HELP!!!
DEAD CYLINDER :(
- Thread starter holtjohn
- Start date
Then, your rings are not likely to be the problem. The next thing to check is the valves. Have you tried loosening up the rockers a bit and then checking the compression?
It sounds like you have a bent, burned, or leaking valve. Or a leaking head gasket (less likely).
Perhaps wait for some other opinions to appear.
Perhaps wait for some other opinions to appear.
see the weird thing is that the engine runs fine, I figure with a bent vavle it would run like crap. I did a vacuum test also and it sits pretty solid a around 10 also.
see I thought that to so I took it out and put the long tread adapter on it, then I tried with teflon and every which way I think of and the same thing 30 psi. I tested it about 10 times.
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