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Detonation - What it is, causes, avoidance, etc.

3K views 2 replies 3 participants last post by  titter 
#1 ·
Detonation (aka Knock) - Causes and Prevention

I put together an article from some research I did on detonation.

Most of the Subaru community seemed to like my post on ring land failure, so I expanded on the cause of the failure with this article.
 
#3 ·
"Stuck in Traffic + Sudden Acceleration

You’ve been stuck in stop and go traffic for 30 minutes, but suddenly you reach your exit and you go for it. You drop the hammer in 2nd gear and the EJ257 goes to work. Problem is … the 180° F air your turbo is ingesting is coming out of the turbo at over 400° F. That hot air is being fed to a heat-soaked, top-mounted intercooler (TMIC), which hasn’t had time to cool after being cooked under the hood. The result is feeding your engine 350°F air at 15 PSI of boost pressure. Add in additional compression from the AVCS cam phasing and you can see just how easy it is to grenade those brittle hypereutectic pistons."



this needs to be in the owners manual seriously! not that anyone reads those things anyways lol :(
 
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