lt4 knock module
Registered User
Joined: Apr 2002
Posts: 1,450
From: LA, So Cal
Originally posted by 95CamaroZ-28
Should take you about 5 minutes to put in the KM.
1) Unhook battery.
2) Remove two 10mm bolts holding PCM.
3) Pull PCM out of hole.
4) Remove two bolts holding KM cover on side of PCM and remove cover.
5) Push in side clips on the KM and pull out.
6) Push in new LT4 KM until it clips in.
7) Reverse procedure.
Should take you about 5 minutes to put in the KM.
1) Unhook battery.
2) Remove two 10mm bolts holding PCM.
3) Pull PCM out of hole.
4) Remove two bolts holding KM cover on side of PCM and remove cover.
5) Push in side clips on the KM and pull out.
6) Push in new LT4 KM until it clips in.
7) Reverse procedure.
Registered User
Joined: Nov 2001
Posts: 3,515
From: Kansas
Originally posted by Dmx4ever3
so i have a 95 camaro lt1 which is better the lt1 km or the lt4 km and does it make gas mileage any better?
so i have a 95 camaro lt1 which is better the lt1 km or the lt4 km and does it make gas mileage any better?
the LT1 KM is the "better" km. this is because its actually more sensative to harmful knock. the LT4 is inferior but b/c what it does is help save ppl from losing power, most believe this is like an upgrade or something which is totally wrong. but the way i see it is if its good enough for an LT4 then its good enough for me.
Registered User
Joined: Sep 2001
Posts: 4,152
From: Woodstown, NJ
All you ever wanted to know about knock modules:
The LT4 knock module is GM part number 16214681.
The LT1 knock module is GM part number 16177700. This is the stock LT1 module that comes with the PCM. You do not want to buy this module.
The stock KM is very sensitive, and can easily pick up false knock (noisy valvetrains, loud exhaust, headers, etc., can all be either interpreted as false knock or amplify valvetrain noise) and subsequently retard engine timing to prevent detonation. If there IS no real knock, then you're hurting your potential power gains.
The LT4 module was designed with the LT4 valvetrain in mind (full roller rockers, LT4 cam, etc.) and is therefore less sensitive, and only indicates REAL knock. You can see the difference if you have the means of scanning your car. I monitored 9 degrees of knock prior to the LT4 module, then only 2 after it was installed. That's seven degrees of retard that was hurting me.
1993 models do NOT have a removable knock module.
The knock module is not to be confused with the knock sensor, which is fixed in the block on the passenger side of the engine, doubling as a coolant drain plug.
The LT4 knock module is GM part number 16214681.
The LT1 knock module is GM part number 16177700. This is the stock LT1 module that comes with the PCM. You do not want to buy this module.
The stock KM is very sensitive, and can easily pick up false knock (noisy valvetrains, loud exhaust, headers, etc., can all be either interpreted as false knock or amplify valvetrain noise) and subsequently retard engine timing to prevent detonation. If there IS no real knock, then you're hurting your potential power gains.
The LT4 module was designed with the LT4 valvetrain in mind (full roller rockers, LT4 cam, etc.) and is therefore less sensitive, and only indicates REAL knock. You can see the difference if you have the means of scanning your car. I monitored 9 degrees of knock prior to the LT4 module, then only 2 after it was installed. That's seven degrees of retard that was hurting me.
1993 models do NOT have a removable knock module.
The knock module is not to be confused with the knock sensor, which is fixed in the block on the passenger side of the engine, doubling as a coolant drain plug.
Registered User
Joined: Feb 2003
Posts: 236
From: NE philadelphia pa, FOX CHASE
so then i have a lt1 km in my car already and shouldn't get a used one off ebay for like 10 bucks cause its the same thing and i don't know if their anything wrong with mine but i don't need to upgrade to the lt4 one cause the one i have is good for me??? u can see the mods i have done below
Registered User
Joined: Sep 2002
Posts: 656
From: Staunton, Illinois
i am with a bunch of you guys on here and are not sure how this thing actually works. the posts you all gave have been really helpful. my question is, did anyone notice a difference by how the car ran with this lt4 knock module? i am not just talking about performance. did the car do anything different that you noticed by driving? thanks
Registered User
Joined: Sep 2001
Posts: 4,152
From: Woodstown, NJ
Originally posted by cals400ex
i am with a bunch of you guys on here and are not sure how this thing actually works. the posts you all gave have been really helpful. my question is, did anyone notice a difference by how the car ran with this lt4 knock module? i am not just talking about performance. did the car do anything different that you noticed by driving? thanks
i am with a bunch of you guys on here and are not sure how this thing actually works. the posts you all gave have been really helpful. my question is, did anyone notice a difference by how the car ran with this lt4 knock module? i am not just talking about performance. did the car do anything different that you noticed by driving? thanks
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