LS3 swap finalization (I hope)
02-17-2022, 08:55 AM
#1
LS3 swap finalization (I hope) Hi everyone, . Just blew up the LS6 in my 05, 148XXX miles, made a nice window in the block. I am thinking about the LS3 upgrade, been doing a lot of research and here are the things, I found out, trying to just get the definitive answer on if I have the whole list or not. Seems pretty comprehensive, any thoughts?[/color]
(BTW, most of this list came from this Forum.... lol)
Wrong crank trigger. Two solutions:
A: Go with the Lingenfelter 58 to 24x converter box. I don't know of the problems stated by jmilz28, but it's up to you if you want to go with option B.
B: Remove the crank and install the 24x crank trigger. Change the cam sensor to the 24x (black) sensor)
2. Cam/knock sensor differences
Tap the knock sensor holes to M10 and install LS6 knock sensors in them. Use KAT-4750 cam/knock adapter harness to move the knock sensors to the side of the block and connect the new cam sensor location in the front cover.
3. Wrong cam trigger
You need a 2x cam trigger so you'll need to use the 2005 LS2 sprocket (12576407). The problem with running this in an LS3 is that it's for a three bolt cam so you'll also need to change the camshaft. You can put in an aftermarket cam or pick up a low cost OEM take out such as an LS2 or LS6 cam.
4. Injector connector difference
You'll need KAT-A4758 injector adapters
5. MAP sensor difference
The LS6 uses a Delphi sensor and the LS3 uses Bosch. There are two solutions:
A. Run the Delphi sensor and use a small piece of hose to make up the difference in the grommet diameter. Fabricate a small metal hold down to secure the sensor. You will also need KAT-4751 MAP extension harness since the MAP sensor on the LS3 is located in the front.
B. Run the Bosch sensor and use the KAT-5185 MAP sensor adapter. You will also need to use the KAT-4751 MAP extension.
6. Throttle body difference
Use KAT-4752 throttle body adapter harness.
7. Need to use an 05 Vette fuel filter to get the pressure regulator as the LS3 doesnt have it on the rail.
Questions:
1) Can i use the LS6 headers, I think so.
2) What does everyone use to tune these?
I am planing on ordering this week since there is such a backlog everywhere (~1 month).
Thanks a bunch!
Norbert
(BTW, most of this list came from this Forum.... lol)
Wrong crank trigger. Two solutions:
A: Go with the Lingenfelter 58 to 24x converter box. I don't know of the problems stated by jmilz28, but it's up to you if you want to go with option B.
B: Remove the crank and install the 24x crank trigger. Change the cam sensor to the 24x (black) sensor)
2. Cam/knock sensor differences
Tap the knock sensor holes to M10 and install LS6 knock sensors in them. Use KAT-4750 cam/knock adapter harness to move the knock sensors to the side of the block and connect the new cam sensor location in the front cover.
3. Wrong cam trigger
You need a 2x cam trigger so you'll need to use the 2005 LS2 sprocket (12576407). The problem with running this in an LS3 is that it's for a three bolt cam so you'll also need to change the camshaft. You can put in an aftermarket cam or pick up a low cost OEM take out such as an LS2 or LS6 cam.
4. Injector connector difference
You'll need KAT-A4758 injector adapters
5. MAP sensor difference
The LS6 uses a Delphi sensor and the LS3 uses Bosch. There are two solutions:
A. Run the Delphi sensor and use a small piece of hose to make up the difference in the grommet diameter. Fabricate a small metal hold down to secure the sensor. You will also need KAT-4751 MAP extension harness since the MAP sensor on the LS3 is located in the front.
B. Run the Bosch sensor and use the KAT-5185 MAP sensor adapter. You will also need to use the KAT-4751 MAP extension.
6. Throttle body difference
Use KAT-4752 throttle body adapter harness.
7. Need to use an 05 Vette fuel filter to get the pressure regulator as the LS3 doesnt have it on the rail.
Questions:
1) Can i use the LS6 headers, I think so.
2) What does everyone use to tune these?
I am planing on ordering this week since there is such a backlog everywhere (~1 month).
Thanks a bunch!
Norbert
Last edited by Red05V; 02-25-2022 at 12:07 PM.
02-18-2022, 12:52 PM
#2
Looks like you have your arms around it. I would only add 2 things:
1. Compare this TOTAL cost involved to total cost for a stroker rebuild. You may find not having to do so many adapters/conversions puts you in a similar cost arena without as many additional failure points.
2. Get a professional tune from a well-respected tuner.
1. Compare this TOTAL cost involved to total cost for a stroker rebuild. You may find not having to do so many adapters/conversions puts you in a similar cost arena without as many additional failure points.
2. Get a professional tune from a well-respected tuner.
02-18-2022, 02:48 PM
#3
Looks like you have your arms around it. I would only add 2 things:
1. Compare this TOTAL cost involved to total cost for a stroker rebuild. You may find not having to do so many adapters/conversions puts you in a similar cost arena without as many additional failure points.
2. Get a professional tune from a well-respected tuner.
1. Compare this TOTAL cost involved to total cost for a stroker rebuild. You may find not having to do so many adapters/conversions puts you in a similar cost arena without as many additional failure points.
2. Get a professional tune from a well-respected tuner.
Are there handheld tuners or is it a chip, flashed ecm? What's typical ?
The following users liked this post:
jmilz28 (02-21-2022)
02-24-2022, 06:53 AM
#6
Wrong crank trigger. Two solutions:
A: Go with the Lingenfelter 58 to 24x converter box. I don't know of the problems stated by jmilz28, but it's up to you if you want to go with option B.
B: Remove the crank and install the 24x crank trigger. Change the cam sensor to the 24x (black) sensor)
Either option works. I've had success with the Lingenfelter box personally so I wouldn't think of it as a bandaid. Plus it saves you downtime/costs with the latter.
2. Cam/knock sensor differences
Tap the knock sensor holes to M10 and install LS6 knock sensors in them. Use KAT-4750 cam/knock adapter harness to move the knock sensors to the side of the block and connect the new cam sensor location in the front cover.
The LS2 (2 wire sensors) will not work with the LS1/6 OS. You will need to use the LS6 sensors.
7. Need to use an 05 Vette fuel filter to get the pressure regulator as the LS3 doesnt have it on the rail.
Fuel pressure is regulated in the tank. No need to run a vette fuel filter.
Questions:
1) Can i use the LS6 headers, I think so. Yes, whatever headers you're currently running will work.
2) What does everyone use to tune these? I'd say 99.9% of stock ECU people are tuned using HP Tuners. Take it to a QUALITY professional.
A: Go with the Lingenfelter 58 to 24x converter box. I don't know of the problems stated by jmilz28, but it's up to you if you want to go with option B.
B: Remove the crank and install the 24x crank trigger. Change the cam sensor to the 24x (black) sensor)
Either option works. I've had success with the Lingenfelter box personally so I wouldn't think of it as a bandaid. Plus it saves you downtime/costs with the latter.
2. Cam/knock sensor differences
Tap the knock sensor holes to M10 and install LS6 knock sensors in them. Use KAT-4750 cam/knock adapter harness to move the knock sensors to the side of the block and connect the new cam sensor location in the front cover.
The LS2 (2 wire sensors) will not work with the LS1/6 OS. You will need to use the LS6 sensors.
7. Need to use an 05 Vette fuel filter to get the pressure regulator as the LS3 doesnt have it on the rail.
Fuel pressure is regulated in the tank. No need to run a vette fuel filter.
Questions:
1) Can i use the LS6 headers, I think so. Yes, whatever headers you're currently running will work.
2) What does everyone use to tune these? I'd say 99.9% of stock ECU people are tuned using HP Tuners. Take it to a QUALITY professional.
02-24-2022, 07:40 AM
#7
Wrong crank trigger. Two solutions:
A: Go with the Lingenfelter 58 to 24x converter box. I don't know of the problems stated by jmilz28, but it's up to you if you want to go with option B.
B: Remove the crank and install the 24x crank trigger. Change the cam sensor to the 24x (black) sensor)
Either option works. I've had success with the Lingenfelter box personally so I wouldn't think of it as a bandaid. Plus it saves you downtime/costs with the latter.
2. Cam/knock sensor differences
Tap the knock sensor holes to M10 and install LS6 knock sensors in them. Use KAT-4750 cam/knock adapter harness to move the knock sensors to the side of the block and connect the new cam sensor location in the front cover.
The LS2 (2 wire sensors) will not work with the LS1/6 OS. You will need to use the LS6 sensors.
7. Need to use an 05 Vette fuel filter to get the pressure regulator as the LS3 doesnt have it on the rail.
Fuel pressure is regulated in the tank. No need to run a vette fuel filter.
Questions:
1) Can i use the LS6 headers, I think so. Yes, whatever headers you're currently running will work.
2) What does everyone use to tune these? I'd say 99.9% of stock ECU people are tuned using HP Tuners. Take it to a QUALITY professional.
A: Go with the Lingenfelter 58 to 24x converter box. I don't know of the problems stated by jmilz28, but it's up to you if you want to go with option B.
B: Remove the crank and install the 24x crank trigger. Change the cam sensor to the 24x (black) sensor)
Either option works. I've had success with the Lingenfelter box personally so I wouldn't think of it as a bandaid. Plus it saves you downtime/costs with the latter.
2. Cam/knock sensor differences
Tap the knock sensor holes to M10 and install LS6 knock sensors in them. Use KAT-4750 cam/knock adapter harness to move the knock sensors to the side of the block and connect the new cam sensor location in the front cover.
The LS2 (2 wire sensors) will not work with the LS1/6 OS. You will need to use the LS6 sensors.
7. Need to use an 05 Vette fuel filter to get the pressure regulator as the LS3 doesnt have it on the rail.
Fuel pressure is regulated in the tank. No need to run a vette fuel filter.
Questions:
1) Can i use the LS6 headers, I think so. Yes, whatever headers you're currently running will work.
2) What does everyone use to tune these? I'd say 99.9% of stock ECU people are tuned using HP Tuners. Take it to a QUALITY professional.
Thanks man!
Knock sensors, just move them and use my sensors?? That's what it sounds like.
the ls3 intake has no regulator on it, but my ls6 does, or what I assume is a regulator. Any concerns with not having that? I think that was the intent of the 05 vette filter.
Great info everyone I appreciate, first parts will be here next week!!
Norbert
Trending Topics
02-24-2022, 08:32 AM
#9
02-24-2022, 09:04 AM
#10
Thanks man!
Knock sensors, just move them and use my sensors?? That's what it sounds like.
the ls3 intake has no regulator on it, but my ls6 does, or what I assume is a regulator. Any concerns with not having that? I think that was the intent of the 05 vette filter.
Great info everyone I appreciate, first parts will be here next week!!
Norbert
Knock sensors, just move them and use my sensors?? That's what it sounds like.
the ls3 intake has no regulator on it, but my ls6 does, or what I assume is a regulator. Any concerns with not having that? I think that was the intent of the 05 vette filter.
Great info everyone I appreciate, first parts will be here next week!!
Norbert
That's not a regulator on your current fuel rail that's a pulsation damper, don't worry about it.
02-25-2022, 10:13 AM
#13
I used the Lingenfelter box back in 2010. It caused me major issues, it would get hot and car would stall and not restart. This was said to be fixed in a redesign, and probably was. That said, it caused me enough problems that since it would no longer unreliably, I had to sell it. With my scar tissue, if it's my daily - I ain't using it. If it's an extra car, I would take the chance. Yes, it saves you from having to pull the crank but it adds in multiple failure points.
02-25-2022, 10:19 AM
#14
I used the Lingenfelter box back in 2010. It caused me major issues, it would get hot and car would stall and not restart. This was said to be fixed in a redesign, and probably was. That said, it caused me enough problems that since it would no longer unreliably, I had to sell it. With my scar tissue, if it's my daily - I ain't using it. If it's an extra car, I would take the chance. Yes, it saves you from having to pull the crank but it adds in multiple failure points.
The following users liked this post:
jmilz28 (02-27-2022)
04-15-2022, 06:54 PM
#16
All swap parts are in except the engine.... lol. Still ordering stock replacement stuff to fix while everything is out. Slowly making progress on removal, at like 80%. Not rushing as I have no need. Maybe next week I will yank it out though
The following users liked this post:
jmilz28 (04-21-2022)
