Too rich AFR's causes knock?
#1
Too rich AFR's causes knock?
Hi guys,
Been on the forum for some time, browsing and reading alot...wanna gather as much info as possible before i start modifying my car (E8 MR JDM).
I know that too lean AFR's can lead to knock, but can too rich AFR's also lead to knock?
Been on the forum for some time, browsing and reading alot...wanna gather as much info as possible before i start modifying my car (E8 MR JDM).
I know that too lean AFR's can lead to knock, but can too rich AFR's also lead to knock?
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#11
I was running 10:1 afr's and it was causing knock in the higher rpm range even after retarding a good amount of timing. Now with closer to 11.3:1 no more knock.
Last edited by clockworktoy; May 14, 2009 at 12:14 AM.
#12
EvoM Guru
iTrader: (50)
One thing that wasn't mentioned is that rich knock looks different than lean knock. Lean knock tends to result in strong knock spikes where as rich knock tends to come on slowly over several hunderd RPM and stay at fairly low levels, usually a knock sum of 5 or less in my experience.
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Jul 22, 2009 12:46 PM