knock module
Registered User
Joined: Feb 2003
Posts: 348
From: Virginia Beach when I'm home!
As best I can tell, it's the tone and frequency of your exhaust. After a header install, it's so loud it sets off the knock module. The LT4 module has a narrower bandwidth, which doesn't include the frequency your exhaust emits.
Something like that.
Something like that.
Registered User
Joined: Jun 2002
Posts: 1,123
Originally posted by Red96Lt1
Why do headders cause false knock?
Why do headders cause false knock?
Registered User
Joined: Jun 2003
Posts: 2,253
From: Birmingham, Al
Originally posted by 95TA8280
Headers don't cause much knock from what I understand, but due to the fact they make the car louder then can cause some knock. Mainly people do it after new RRs....I think those are what cause a lot of false knock.
Headers don't cause much knock from what I understand, but due to the fact they make the car louder then can cause some knock. Mainly people do it after new RRs....I think those are what cause a lot of false knock.
Registered User
Joined: Aug 2002
Posts: 2,356
From: Madison Heights, MI
The 1.6 RRs on the LT4 which are the GMPP (Crane) make for a noisier valve train. The LT4 KM and LT4 valve covers (cuts down on valve train noise) are supposed to take care of that. I have LTs and dont plan on wasting money on a KM. I think the headers and needing the LT4 KM is an old wive's tale like people think that all there is to heads is "killer flow" when theres much more to it than that.
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