Here's why a bad tune / bad gas kills motors
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Senior Member
Joined: Mar 2001
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From: Plymouth, MI
Here's why a bad tune / bad gas kills motors
detonation
The second set of pictures is very difficult to compare to the first but it's important to note that the detonation in that case is caused by increasing the timing. It appears to me that the first set of pictures represents extreme cylinder pressures and/or poor gas (note that the plug never appears to fire).
The rapid increase in cylinder pressure at or before TDC will cause piston/rod problems very quickly.
The second set of pictures is very difficult to compare to the first but it's important to note that the detonation in that case is caused by increasing the timing. It appears to me that the first set of pictures represents extreme cylinder pressures and/or poor gas (note that the plug never appears to fire).
The rapid increase in cylinder pressure at or before TDC will cause piston/rod problems very quickly.
Thread Starter
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Senior Member
Joined: Mar 2001
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From: Plymouth, MI
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Joined: May 2004
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From: Denver, CO
Originally posted by Silver_2000_
!
using the terms in the second article
The ping from too much timing ( the park plug firing too far before Top dead center ) ISNT detonation but its called pre ignition
Doug
! using the terms in the second article
The ping from too much timing ( the park plug firing too far before Top dead center ) ISNT detonation but its called pre ignition
Doug
