LS2 with LS1 knock sensors ...
06-02-2005, 06:02 PM
#1
LS2 with LS1 knock sensors ... .
I thought I saw something about this awhile back, but have been unable to find it lately.
what solutions have people come up with regarding making the LS1 knock sensors work on the LS2. I thought I heard awhile back that someone tapped a hole on the side of the block, but I don't remember how it turned out.
Any info would be great.
Also, I'm planning on using stock gapped TR-6 spark plugs on the new 402ci LS2 ... good, or should I use the TR-55's?
I thought I saw something about this awhile back, but have been unable to find it lately.
what solutions have people come up with regarding making the LS1 knock sensors work on the LS2. I thought I heard awhile back that someone tapped a hole on the side of the block, but I don't remember how it turned out.
Any info would be great.
Also, I'm planning on using stock gapped TR-6 spark plugs on the new 402ci LS2 ... good, or should I use the TR-55's?
06-02-2005, 07:04 PM
#3
Originally Posted by Spinmonster
I take it the LS2 knock sensors are not good or give false readings?
06-02-2005, 09:00 PM
#4
From what I remember there are a couple tapped holes that are unused on both sides of the lower block. But they could only fit the two sensors on the passenger side. They also logged some minor knock that looked similar to that logged on a LS1, so they felt it was functioning ok.Hope that helps, it was all from memory.
I'll let you know more in a few weeks when I get my 412
in the car. We seem to have all the parts now we just need to get it assembled. Its not even in the car and it is demanding clutch upgrades, my Spec 3 seems to be dead. So a Street Twin will have to do.
Rampant
I'll let you know more in a few weeks when I get my 412
in the car. We seem to have all the parts now we just need to get it assembled. Its not even in the car and it is demanding clutch upgrades, my Spec 3 seems to be dead. So a Street Twin will have to do.Rampant
06-03-2005, 01:04 PM
#7
Originally Posted by RAMPANT
From what I remember there are a couple tapped holes that are unused on both sides of the lower block. But they could only fit the two sensors on the passenger side. They also logged some minor knock that looked similar to that logged on a LS1, so they felt it was functioning ok.Hope that helps, it was all from memory.
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Also, will the TR-6 plugs be good for the 402?
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06-03-2005, 04:45 PM
#9
Originally Posted by technical
I'm curious just how different the pin-out is on the ls1 harness vs. the ls2. It can't be that hard to rewire the harness and use a ls2 ecm.
I'm not sure ... but why go through all the work when the only thing that isn't compatiable is two knock sensors .... which aren't even that necessary given a good tune. If I remember right, I also heard something about the LS1 PCM being equal to, or better than, the LS2 PCM from a tuning stand-point.
06-03-2005, 06:33 PM
#10
Originally Posted by technical
I'm curious just how different the pin-out is on the ls1 harness vs. the ls2. It can't be that hard to rewire the harness and use a ls2 ecm.
06-03-2005, 10:59 PM
#11
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Guys - There is alot information about this very subject (including pictures) in this forum. Do a search and you will find it.
Briefly, LS1 Knock sensors have been successfully retrofitted to the LS2 block. You have to tap the existing hole to make them work. One problem is they stick out and will interfere will some long tube headers. I know of only one here (Perry?) that actually went through with the installation of the sensors; he seems to be fine with them. Personally after talking to a couple of sponsors and realizing the sensors might have clearance issues with the 1-7/8" QTP's I am not running them.
Hope this helps.
Briefly, LS1 Knock sensors have been successfully retrofitted to the LS2 block. You have to tap the existing hole to make them work. One problem is they stick out and will interfere will some long tube headers. I know of only one here (Perry?) that actually went through with the installation of the sensors; he seems to be fine with them. Personally after talking to a couple of sponsors and realizing the sensors might have clearance issues with the 1-7/8" QTP's I am not running them.
Hope this helps.
06-12-2005, 10:35 AM
#12
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Guys,
I have FLP headers and I was able to install the LS1 KS on the driver side using pre-existing holes in the block. You don't even have to retap the holes, they are the same thread size. I am awaiting a tune so I can't say how they repond to being there but there def is no fitment issue with FLP LTs.
I have FLP headers and I was able to install the LS1 KS on the driver side using pre-existing holes in the block. You don't even have to retap the holes, they are the same thread size. I am awaiting a tune so I can't say how they repond to being there but there def is no fitment issue with FLP LTs.
06-13-2005, 06:34 PM
#13
Originally Posted by NEW402
Guys,
I have FLP headers and I was able to install the LS1 KS on the driver side using pre-existing holes in the block. You don't even have to retap the holes, they are the same thread size. I am awaiting a tune so I can't say how they repond to being there but there def is no fitment issue with FLP LTs.
I have FLP headers and I was able to install the LS1 KS on the driver side using pre-existing holes in the block. You don't even have to retap the holes, they are the same thread size. I am awaiting a tune so I can't say how they repond to being there but there def is no fitment issue with FLP LTs.
06-13-2005, 10:32 PM
#14
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Originally Posted by xphantomws6x
Anyone else have a block that has the correct knock sensor hole sizes? I have never heard this before, what company built your shortblock, maybe they tapped the hole to fit the sensor already?
06-13-2005, 11:56 PM
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Originally Posted by NEW402
Scoggin Dickey built the shortblock and I did not request it so I doubt they tapped it. Could there be different knock sensors between the LS1 years? My KSs are off a 99 LS1. I used the 2 holes that were just behind the motor mounts. No tapping was involved at all.
The wire harness is pretty darn close to my headers, but OK. I had to extend the wires to reach.
06-14-2005, 08:22 AM
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Originally Posted by mr2guru
I am pretty sure all versions of LS2's are DBW. Some LS1s are DBW some are not. That would be a much larger hurdle than just knock sensors.
06-14-2005, 11:31 AM
#18
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Originally Posted by NEW402
Scoggin Dickey built the shortblock and I did not request it so I doubt they tapped it. Could there be different knock sensors between the LS1 years? My KSs are off a 99 LS1. I used the 2 holes that were just behind the motor mounts. No tapping was involved at all.
Thank you for purchasing your short block with us, and let me know if there is anything I can help with.
