Interesting thread: I had my PCM initially tuned by Ed Wright when I had my little cam installed. I then had PCMFORLESS retune it, because Ed disabled the readouts and I couldn't get it passed emissions w/o the readouts.

Brian did a little touchup and enabled the readouts so that I can pass emissions cops. At the time I had Brian tune the PCM, he recommended getting the LT4 KM--so I did.

Since I have headers and SA RRs, I assume that the car makes more noise than stock----and if a stock KM could interpret the excess noise as "knock" and pull timing, then I assume a less sensitive KM would not pick up the non-knock noise and pull timing.

So, to me, it seemed reasonable to swap out the KM with a less sensitive one. So, if you have RRs and Headers, and a tune-up isn't yet required, it seems logiscal to me to just throw in an LT4 KM----but now I'm hearing that it isn't worth anything. My response to that is how do you know? Most of us do not have engine monitoring devices and gauges in our cars and if the KM is working we won't know if we had real knock or false knock and won't know if timing was pulled or not.

So, again, it seems logical to me that if you are adding mods which may increase the possibility of false knock that spending 35 bucks for a less sensitive KM that you can swap out in 10 15 minutes won't hurt anything and may in fact help----let's face it, if your knock is not detonation, but a spun bearing, it won't make any difference if you pulll timing or not. JMHO

 

Read Madwolf's post on the matter,the quote above.
The LT4 KM is tuned for the noises on an LT4 and nothing else and it don't work.

 

I knew it. I ran out and got the LT4KM thinking it would turn water into wine and got nothing. I thought I was one of the few. I shouldve listened to 1racerdude the first time.

 

Well, for 35 bucks, if it isn't hurting anything and "might even pull less timing" I don't plan on removing it. JMHO

 

No one said to remove it.
It just isn't worth the money to go buy one expecting it to "cure all".

 

How about one of you scan for timing with stock KM and headers, etc and see if timing is being pulled and then put in the LT4 KM and do the same thing ---rev the sucker up so you get the full benefit of header noise, etc. and see if the PCM pulls out the same timing.

Now if no timing is pulled at all with either scenario that would only prove that the noise of your particular setup does is not sufficient to trigger the KM even a stock KM, however if it shows less timing pulled with a less sensitive KM, then....

But since each setup, other than stock, may emit different noise, it seems that you would need a custom KM to completely eliminate unwanted retard of the timing.

I make this request, since it is usually the one's who have the scanners and want to know whenever the car farts who either substantiate or dismiss many of the suggestions made by differenct sources thoughout the life of the site regarding the benefits or disadvantages of certain mods. JMHO

 

Damn good idea if anyboby would take the time.