What are better pistons than Diamond forged?
09-06-2005, 10:47 PM
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What are better pistons than Diamond forged? Are JE or Wiseco made of better alloy, or have a larger top ring down distance?
Below is cylinder 5 and cylinder 7. I think cylinder 4 looks similar.
Below is cylinder 5 and cylinder 7. I think cylinder 4 looks similar.
Last edited by blu00rdstr; 09-07-2005 at 02:05 PM.
09-07-2005, 01:13 AM
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pistons je pistons are 5 times better than diamonds from what ive found and you can order a nitrous piston with lower rings ran a 400 shot on my je's and timing box failed to retard timing melted all plugs pistons fine
09-07-2005, 08:09 AM
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To be honest with you, that is not a problem with the piston itself. You must have had some major detonation going on there for that to happen. If the tune is wrong, it will break. All alloys break in their own way some will do what you did some will eat a hole in the top.
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09-07-2005, 02:08 PM
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Thanks guys. This was caused by suddenly running at 17psi. It was tuned for and running at 14psi, then I fixed a leak on the BOV mounting flange. I never heard it ping, and I only went WOT on it once and backed off when I saw the gauge needle swing past the big 15psi mark, it didn't even hit redline. But the freeway did suddenly feel narrow at 17psi.
09-07-2005, 03:37 PM
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pistons IMHO
Your ring end gap was too tight, what did you have for end gap? If it was too tight the rings would have butted and will lift the top land at its weekest spot. for 17 lbs with good a/f ratio, I would have run them at least .024-.026
you can tell by looking at the end of the ring. it will be scuffed.
hope this helps
Your ring end gap was too tight, what did you have for end gap? If it was too tight the rings would have butted and will lift the top land at its weekest spot. for 17 lbs with good a/f ratio, I would have run them at least .024-.026
you can tell by looking at the end of the ring. it will be scuffed.
hope this helps
09-07-2005, 03:45 PM
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Originally Posted by Craig@ETPerformance
To be honest with you, that is not a problem with the piston itself. You must have had some major detonation going on there for that to happen. If the tune is wrong, it will break. All alloys break in their own way some will do what you did some will eat a hole in the top.
