LS2 LS3 knock sensor in place of a LS1 knock sensor (side engine block install)
LS2 LS3 knock sensor in place of a LS1 knock sensor (side engine block install) Need some help please.
I have the LS1 ECM and harness with LS1 knock sensors on the side of the block, unfortunately with the Hooker headers 2276-1HKR (with 1 7/8" collector size) the driver side knock sensor with the plug connected i have about 1/8" space (maybe less) between the plug and the header. The passenger side is close as well, but not as bad as the driver side.
So I was talking with my new engine harness builder, and it was suggested to swap to LS2 LS3 knock sensors are they are flat and 90° connector. Then modify the knock type on the ECM with the tune.
My problem is that the LS2 knock sensor has the bolt with a M8 1.25 thread size, while the LS1 knock sensor is a M10 1.5 thread. The M10 thread is already tapped on the block, I could use a helicoil but the only one i found that would fit requires a 1/2-13 thread tap for it to work. I really want to stay away of retaping the block, but I might have to do as a last resort.
Doing a search here I found the following,
https://ls1tech.com/forums/lt1-lt4-m...l#post17392762
Which is sold by EFIConnection here, the problem I am facing is the mounting thread is 1/4" NPT
Does anyone have a solution like this? I was thinking of maybe getting a M10 cap bolt, drill a hole on the top M8 1.25 size then thread a M8 1.25 thread rod to it and call it a day?
Thank you for your help.
I have the LS1 ECM and harness with LS1 knock sensors on the side of the block, unfortunately with the Hooker headers 2276-1HKR (with 1 7/8" collector size) the driver side knock sensor with the plug connected i have about 1/8" space (maybe less) between the plug and the header. The passenger side is close as well, but not as bad as the driver side.
So I was talking with my new engine harness builder, and it was suggested to swap to LS2 LS3 knock sensors are they are flat and 90° connector. Then modify the knock type on the ECM with the tune.
My problem is that the LS2 knock sensor has the bolt with a M8 1.25 thread size, while the LS1 knock sensor is a M10 1.5 thread. The M10 thread is already tapped on the block, I could use a helicoil but the only one i found that would fit requires a 1/2-13 thread tap for it to work. I really want to stay away of retaping the block, but I might have to do as a last resort.
Doing a search here I found the following,
https://ls1tech.com/forums/lt1-lt4-m...l#post17392762
Which is sold by EFIConnection here, the problem I am facing is the mounting thread is 1/4" NPT
Does anyone have a solution like this? I was thinking of maybe getting a M10 cap bolt, drill a hole on the top M8 1.25 size then thread a M8 1.25 thread rod to it and call it a day?
Thank you for your help.
I'm not 100% positive, but I don't think you can use the ls2-3 knock sensors on a ls1 pcm, there is nothing in the pcm that can change type of knock sensor. The ls1 sensor is a 1 wire and the ls2-3 knock sensor is 2 wire.
https://ls1tech.com/forums/conversio...l#post18444260
http://www.hptuners.com/forum/showth...a-Ls1-Pcm-!-!-!
You can use the LS2 knock sensors and then change the calibration mode on the PCM to flat response
