LS2 with LS1 harness?
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LS2 with LS1 harness? Hi,
Looking at buying a complete LS2 out of a TBSS. It comes with harness but no PCM. Have a complete LM7(early, return-style fuel setup if that even matters) with modified harness and PCM in the Jeep working just fine.
What am I up against getting the LS2 working with the LS1 harness and PCM?
So far, I see that I will need:
1x cam sensor retrofit harness
1x knock sensor adapter/extension harness
8x fuel injector harness adapters
Corvette-style fuel filter with integrated regulator or convert my old rails/regulator
90mm cable throttle body(already got this)
MAF?? Can I use my stock truck MAF somehow?
Is there any issue with the tooth count on the cam or crank?
If I stick with the LS1 harness, if the TBSS harness worth much?
Thanks!
Looking at buying a complete LS2 out of a TBSS. It comes with harness but no PCM. Have a complete LM7(early, return-style fuel setup if that even matters) with modified harness and PCM in the Jeep working just fine.
What am I up against getting the LS2 working with the LS1 harness and PCM?
So far, I see that I will need:
1x cam sensor retrofit harness
1x knock sensor adapter/extension harness
8x fuel injector harness adapters
Corvette-style fuel filter with integrated regulator or convert my old rails/regulator
90mm cable throttle body(already got this)
MAF?? Can I use my stock truck MAF somehow?
Is there any issue with the tooth count on the cam or crank?
If I stick with the LS1 harness, if the TBSS harness worth much?
Thanks!
Last edited by Mercier; Aug 11, 2014 at 12:23 PM.
Biggest hurdle is the 24x LS1 PCM control (GEN III) vs 58x control LS2 (GEN IV)
Ligenfelter sells a conversion box, but there are mixed reviews of its longevity
Beyond that, just bolt all the externals from the LM7 on the LS2, extend the cam sensor connector from the rear china wall to the timing cover and get a knock sensor kit
Some early LS2s were oddballs using the GEN IV block and came stock with GEN III PCM control. These were all 24x engines, so conversions were quite simple because of the enormous aftermarket for GEN III vs GEN IV
Ligenfelter sells a conversion box, but there are mixed reviews of its longevity
Beyond that, just bolt all the externals from the LM7 on the LS2, extend the cam sensor connector from the rear china wall to the timing cover and get a knock sensor kit
Some early LS2s were oddballs using the GEN IV block and came stock with GEN III PCM control. These were all 24x engines, so conversions were quite simple because of the enormous aftermarket for GEN III vs GEN IV
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Ah. That will be the killer. Really don't want to open up the motor. Maybe just have to get a LS2 PCM and use the harness I get.
Any way externally to tell if a motor is the oddball(fingers crossed!) with 24x wheel?
Going to hopefully put my eyes on the engine this evening.
Thanks for the info!
Any way externally to tell if a motor is the oddball(fingers crossed!) with 24x wheel?
Going to hopefully put my eyes on the engine this evening.
Thanks for the info!
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So what about using the LS2 harness and finding a matching ECM? I want to stick with the cabled throttle body. How much trouble am I getting in that way? I do have HP Tuners and at least the ability to find where to turn things off that I don't need.
How much pain am I looking at down that road instead?
Thanks again for your help.
How much pain am I looking at down that road instead?
Thanks again for your help.
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Well I guess that decides it. If I buy this I am out another $250 for the Lingenfelter converter box. Not what I wanted to hear but hey, that's the price of cubes and an aluminum block.
What is the complete LS2 harness worth assuming it is in good shape?
Thanks.
What is the complete LS2 harness worth assuming it is in good shape?
Thanks.
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What year is the LS2? Some of the earlier LS2's are 24 tooth. I used the E40 ECM and T42 for my LQ4. The ECM was out of a 2006 GTO. You must use the DBW pedal from the same family, but you can use a gold blade TB, which is 1/2 the money. I did the harness mods myself. I bought all of the parts from EFI Connection, very helpful and reasonable. And yes you can use the truck MAF.
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I hesitated and another buyer beat me to it. So the search continues.
It was later with 58x.
@Bowtiedford - please explain or detail your setup--this is not the info I have found but I am interested in the possibility if correct.
Thanks!
It was later with 58x.
@Bowtiedford - please explain or detail your setup--this is not the info I have found but I am interested in the possibility if correct.
Thanks!
I used the lingenfelter box, which converts it to 24x signal and a 12200411 PCM which is standard fare for a LS1 and I used a LS1 harness out of a 2000 Camaro. Along with all the adapters to the harness. I did go with the 5 wire mass air meter.
"1x cam sensor retrofit harness
1x knock sensor adapter/extension harness
8x fuel injector harness adapters
Corvette-style fuel filter with integrated regulator or convert my old rails/regulator
90mm cable throttle body(already got this)
MAF?? Can I use my stock truck MAF somehow?
Is there any issue with the tooth count on the cam or crank?" your quote
all of the above you stated I could have saved some money as the person who did my harness extended my harness for the O2's, extended the harness for the Map which is up front now and the camshaft position sensor which is on the timing cover, Knock sensors are on the side of the block, I used LS1 sensors and tapped the side of the block. Converted the MAF to the correct 5 wire plug since LS1's are 3 wire with the IAT on the tube somewhere. I already bought the inj adapters which he would have done anyway. Should have as him before I bought the stuff. Read and post and ask questions before spending money in the wrong direction. I wanted alum 6.0 and LS3 heads which I have now.
Oldgoat answered a few of my questions also.
"1x cam sensor retrofit harness
1x knock sensor adapter/extension harness
8x fuel injector harness adapters
Corvette-style fuel filter with integrated regulator or convert my old rails/regulator
90mm cable throttle body(already got this)
MAF?? Can I use my stock truck MAF somehow?
Is there any issue with the tooth count on the cam or crank?" your quote
all of the above you stated I could have saved some money as the person who did my harness extended my harness for the O2's, extended the harness for the Map which is up front now and the camshaft position sensor which is on the timing cover, Knock sensors are on the side of the block, I used LS1 sensors and tapped the side of the block. Converted the MAF to the correct 5 wire plug since LS1's are 3 wire with the IAT on the tube somewhere. I already bought the inj adapters which he would have done anyway. Should have as him before I bought the stuff. Read and post and ask questions before spending money in the wrong direction. I wanted alum 6.0 and LS3 heads which I have now.
Oldgoat answered a few of my questions also.
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Thanks for the clarification(s), guys.
I should be picking up a motor this weekend. It is a 2005 Vette LS2 so:
24X reluctor wheel on this motor right? So I should just need the wiring bits and be good to go with my LS1 harness/ECM?
I should be picking up a motor this weekend. It is a 2005 Vette LS2 so:
24X reluctor wheel on this motor right? So I should just need the wiring bits and be good to go with my LS1 harness/ECM?
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Thanks, Scott. I am hoping this will all connect up; the 2005 is kinda lucky for the LS1 harness guy(me) from what I can tell. Also already have the DBC setup worked out since the LM7/LS1 swap was working before, so I consider DBW as last resort for now. I will definitely keep you in mind though.