False knock question

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T- Type Tim

Vice Chairman
Joined
Jul 8, 2001
Messages
2,158
Who has seen false knock caused from a header exhaust leak?
I saw 20+ degrees of retard at 15 psi just taking the car for a quick drive. Prior drives in the car I would see zero knock at 20 psi with the same fuel. Was fairly certain I had a false knock issue here.
I found the # 6 header bolts loose with an audible leak when I got home. Turns out it was the culprit . I have checked the header bolts numerous times through a number of heat cycles, but I will be keeping a closer eye on them now.
Hope this helps some of you fellas chasing a false knock.


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