Cracked apex seal, what's the cause?
10-07-11, 01:19 AM
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Cracked apex seal, what's the cause?
engine is pulled apart and everything is new (yes everything), one alex seal has a tiny crack at the edge. Running 13psi on octane 91. I was told by one person that it was due to having super cold plugs (11) and an ignition employer, another one is telling me that it's the tune. Car has a fcon vpro for emanage, T04S turbine
10-07-11, 10:59 AM
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cracked seal = detonation/preignition, so its the fuel/tune
10-11-11, 06:36 AM
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engine is pulled apart and everything is new (yes everything), one alex seal has a tiny crack at the edge. Running 13psi on octane 91. I was told by one person that it was due to having super cold plugs (11) and an ignition employer, another one is telling me that it's the tune. Car has a fcon vpro for emanage, T04S turbine
Barry
https://www.rx7club.com/showthread.p...t=barry+bordes
10-11-11, 11:34 AM
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I'm having a hard time believing it's the tune, yes I know that it's the most common culprit of a broken seal, but this car has been tuned by an HKS dealer in Japan and ran 20psi on Japanese gas when it was used for drag racing. I also know people using petro 91 without problems here in Canada... Would driving the car with a really hardcore silencer create backpressure and cause this? I remember when I got the car It wouldn't even make 0 bar until I took out the silencer..
11-19-11, 12:48 AM
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Can I get anymore input?
Wouldn't the combination of type 11 plugs, one iffy coil and crusty ignition wires cause ignition to be out of wack?
Would having a silencer that doesn't let you spool AT ALL contribute?
Wouldn't the combination of type 11 plugs, one iffy coil and crusty ignition wires cause ignition to be out of wack?
Would having a silencer that doesn't let you spool AT ALL contribute?
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Jeff20B
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