Quote:
Originally Posted by TrackRat
A number of exhaust valves were warped. Small pieces of aluminum piston don't usually destroy a cylinder. Neither engine balance nor misfires cause detonation, piston ring land failure, closed sparkplug electrode gap or warped exhaust valves, etc. Engine balance causes a vibration that you can feel if it's significantly out of balance. In addition the balance can be checked with the engine disassembled and is obviously being rebalanced with the use of new Con Rods, etc.
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The funny thing is the right bank where Cylinder 5,6,7 and 8 is all had the most damage. The cylinders on the left bank 1,2,3 and 4 looked completely fine. Infact, for the left bank, everything looked pretty normal. That is unusually odd I find as I would have thought it would have been collateral damage to the whole engine if it was detonation.
Having said that, I did remember that after the 2nd track day, the engine was a little more rough than the first track day but didnt think much of it untill I heard the ticking noise which bothered me after the misfire. After even replacing the spark plugs, I had that ticking noise prior to tearing down the block. Cylinder 8 damage was the result from the misfire of the other cylinder in the same bank.