Knock retard
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Registered User
Joined: Nov 2003
Posts: 353
From: Tulsa Oklahoma
Knock retard
I have scanned my car and it looks like I am getting 4 to 7 degrees of Knock with normal driving. WOT is usally 8 instantly than drops to 7 is this to much? I am running 93 Octain fuel and have a LT4 KM, will this small amount of knock drop horsepower also will it cause a drop in gas milage?
Super Moderator
Joined: May 1999
Posts: 4,060
From: Inverness, FL
Re: Knock retard
That's too much knock retard and is affecting your hp. Will it cause a drop in gas mileage... not sure about that one? 
Have you tried running some race gas to verify it is false knock? Chance are very good it is false but that's a good test to run to make certain.
Have you tried running some race gas to verify it is false knock? Chance are very good it is false but that's a good test to run to make certain.
Thread Starter
Registered User
Joined: Nov 2003
Posts: 353
From: Tulsa Oklahoma
Re: Knock retard
I have not ran race fuel yet I will be doing that this weekend. Do I need to run a full tank or would a couple of gallons be ok? I run 93 all the time. If it is false knock what could be done to fix it?
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