Jroman

Looking to buy a lt4 knock module? Can anyone help me out?

Jaxem

iTrader: (3)

I see them pop up on eBay periodically, buy they go for like $2-300. I got mine from a member here after posting a want ad in the classifieds section.

Jroman

Man that's pretty steep for at once 30 dollar part lol

rynb15

wow, i guess they stopped making them? ya i paid like nothing for one 10 years ago. ha

Camaro_freak

iTrader: (1)

I'm surprised no one has tried to reverse engineer one to sell. Seems like there's still a market.

Catmaigne

iTrader: (6)

^^^ That's what I was thinking. I have a few b-body KMs laying around. Going to crack one open and inspect it.

Jroman

Man if you have one sold! They should start making them again for all us lt lovers

Jaxem

iTrader: (3)

Yeah, is really sad they're so much, it's probably one resistor different from the regular module, lol

bowtienut

iTrader: (1)

I got one for ya. $110 shipped.

Half of ebay price!

Jroman

Sold! Do you have a PayPal account

bowtienut

iTrader: (1)

You have a PM.

Jroman

What's a pm

bowtienut

iTrader: (1)

Private Message, through the forum.

Catmaigne

iTrader: (6)

Here's the inside of a b-body km... Looks like fun

Jroman

Ah yea will leave it to China to figure that out lol

Vicious95Z28

iTrader: (1)

I wish I'd have bought about 50 of em back in the day. Mine was really cheap with my employee discount back then.

MonmouthCtyLS7

iTrader: (6)

Bought mine about 20 yrs ago for 30-40 bucks from GM.

smitty2919

OP you know for sure you need one??

AFAIK, the LT4 picked up knock at a different frequency than the typical LT1 KM. Which IMO you can adjust your tune and limit the spark retard if you are getting false knock.

I'm going through proving this "false knock" issue right now. I was going to go with the LT4 KM until I saw how rare they are now, and said screw that.

Plus I have read of people using the LT4 KM and it didn't help.

BALLSS

The LT4 came with RR. The noise they make GM felt was causing knock the PCM saw so the LT4 module deals with different harmonic range than the LT1 knock module.

The LT4 also came with "composite" valve covers to help mask the sound of the RR vs the steel ones like on the LT1

I am not a tuner but have read that the sensitivity of reading knock can be adjusted in the PCM. Some feel this is not a good idea as if the knock is real, the PCM won't pull the timing it should.

Like so many parts for 20 year old cars, the LT4 knock module is not made anymore and used ones command big $....supply and demand

When many of us put RR back in the 90's when the cars were fairly new the KM was around $25 from the dealer

Catmaigne

iTrader: (6)

I'm also looking for one if anyone has one for sale for a realistic price.