LS3 swap. Need advice
Thread Starter
Staging Lane
Joined: Sep 2007
Posts: 56
Likes: 0
From: Beaufort, SC
LS3 swap. Need advice Thinking about doing a swap to GM's LS3 (LS 376/480) crate complete w/ their hot cam for a total of 480/475 out of the box. Has anyone done an LS3 swap yet? Will it work w/ the stock PCM. I know the reluctor wheel is different, but what else?
What am I getting into?
What am I getting into?
Someone else can chime in too, but I don't think you will be able to use your harness or PCM. Sensor locations are different, sensors are different, the reluctor ring like you said.
Since you have an M6 and don't need the computer they also offer a harness/PCM kit for that crate engine.
19201327 NEW
LS376/480 Controller Kit
• Includes all the components required to run your GM Performance
Parts crate engine (see chart below for detailed list)
• For individual engine controller, use P/N 19201790
19201861 NEW
LS3 Controller Kit
• Includes all the components required to run your GM Performance
Parts crate engine (see chart below for detailed list)
• For individual engine controller, use P/N 19201859
The kits above (P/N 19166567, 19166568, 19201327, 19201861)
include the following items:
19166573 Engine Harness
12576410 Mass Air Flow Meter
19166574 Mass Air Flow Meter Mounting Boss
10367117 Accelerator Pedal Assembly
12581966 Oxygen Sensor (Qty 2 Per Kit)
15156588 Oxygen Sensor Mounting Boss (Qty 2 Per Kit)
19171935 Instruction Sheet
The controller will not function in a production vehicle
unless all kit components are used. These controllers
will not operate any of the production gauges. Aftermarket
gauges are required.
Since you have an M6 and don't need the computer they also offer a harness/PCM kit for that crate engine.
19201327 NEW
LS376/480 Controller Kit
• Includes all the components required to run your GM Performance
Parts crate engine (see chart below for detailed list)
• For individual engine controller, use P/N 19201790
19201861 NEW
LS3 Controller Kit
• Includes all the components required to run your GM Performance
Parts crate engine (see chart below for detailed list)
• For individual engine controller, use P/N 19201859
The kits above (P/N 19166567, 19166568, 19201327, 19201861)
include the following items:
19166573 Engine Harness
12576410 Mass Air Flow Meter
19166574 Mass Air Flow Meter Mounting Boss
10367117 Accelerator Pedal Assembly
12581966 Oxygen Sensor (Qty 2 Per Kit)
15156588 Oxygen Sensor Mounting Boss (Qty 2 Per Kit)
19171935 Instruction Sheet
The controller will not function in a production vehicle
unless all kit components are used. These controllers
will not operate any of the production gauges. Aftermarket
gauges are required.
Launching!
Joined: Dec 2003
Posts: 251
Likes: 2
From: Portland OR
You can use your existing PCM and harness, you just have to swap the reluctor wheel and cam gear, and get extension/adapter harnesses for cam sensor, knock sensors, injectors, etc.
See this thread:
https://ls1tech.com/forums/showthrea...t=gear+cam+ls3
for lots of detail.
BTW, some of the crate engine vendors - Scoggin Dickey, for instance - will do the reluctor wheel swap (and probably the cam gear swap) for you before shipping the motor. I'd also suggest that, although the Hot Cam is fine, there are almost certainly better choices in the aftermarket - check out the C6 tech/performance board on corvetteforum.com.
See this thread:
https://ls1tech.com/forums/showthrea...t=gear+cam+ls3
for lots of detail.
BTW, some of the crate engine vendors - Scoggin Dickey, for instance - will do the reluctor wheel swap (and probably the cam gear swap) for you before shipping the motor. I'd also suggest that, although the Hot Cam is fine, there are almost certainly better choices in the aftermarket - check out the C6 tech/performance board on corvetteforum.com.
ls3 crate motor gauge question I'm doing a motor swap and was seriously considering the ls3 hot cam crate motor. I'm questioning the ability to use the crate harness/computer setup to run stock style gauges. This isn't going into a gm vehicle, but i know i can connect a computer from an ls1 and make all the gauges work. Why do you need aftermarket gauges for this setup?
Yes i've read quite a few threads on the ls3 crate motor and have seen you need aftermarket gauges. I have yet to see the reason though.
Thanks
Yes i've read quite a few threads on the ls3 crate motor and have seen you need aftermarket gauges. I have yet to see the reason though.
Thanks
Seems like a of work when you could just go 402+ with an LS1 block and be better off. My .02
Thats what Im doing. Im not going through the hassle of an LS3 swap with better choices out there.
Thats what Im doing. Im not going through the hassle of an LS3 swap with better choices out there.
If i can get the ls3 computer to play nicely with my stock gauges i don't see how i could go wrong with an almost turn key motor. Knowing that i have no GM parts to start with.
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Teching In
Joined: Oct 2006
Posts: 18
Likes: 0
I can re-Programming by HP Tuners this is parts 19201790 & 19201859 & 19166570 & 19166569 Engine Controler
http://www.sdpc2000.com/product/1920...sLS376480.aspx
http://paceperformance.com/index.asp...Category=12524
http://www.sdpc2000.com/product/1920...sLS376480.aspx
http://paceperformance.com/index.asp...Category=12524
Last edited by mohd1; Nov 9, 2008 at 01:17 PM.
In the thread starters case that is probably a good idea and probably that is where your post is directed. I thought i made a new thread, instead i brought this one back from the dead.
If i can get the ls3 computer to play nicely with my stock gauges i don't see how i could go wrong with an almost turn key motor. Knowing that i have no GM parts to start with.
If i can get the ls3 computer to play nicely with my stock gauges i don't see how i could go wrong with an almost turn key motor. Knowing that i have no GM parts to start with.
In that case, I agree BUT I would get a real LS3 cam and skip the GM hot cam. They have much better cams available for the LS3 now
Teching In
Joined: Mar 2009
Posts: 1
Likes: 0
Just Finished a LS1 to LS376/480 conversion I just finished a LS1 to LS376/480 conversion in a 2002 Camaro SS. If you want a bolt in, all your gages and transmission control, it's relatively easy. I got my injector harness adapters, 90mm cable throttle body, knock sensor harness adapters, and the 24 to 58 conversion trigger module from Lingenfelter Performance. I had to fabricate a throttle cable bracket, but I think that Scoggin-Dickey has that if you don't want to fabricate. You will have to use your knock sensors from the LS1 engine, and just screw them into each side of the block, build an extension harness for the crank sensor that will reach the other side of the engine, over the throttle body, also extend your factory crank sensor harness to the same point, and the cam sensor harness connector too. Don't use the LS3 MAP sensor, just T your LS1 MAP sensor into the vacuum port in the back of the intake. After I finished, sent it over to G Force in Houston to have it tuned, and dyno. Dyno results were 430hp at the wheels at 6000 rpm. If you want or need a more detailed answer, email me.
Registered User
Joined: Mar 2009
Posts: 1
Likes: 0
ls3 problem put a ls3 in a 2004 silverado -the ls3 throttle body wont work --bought a adapter from truck to it but still wont work --this is drive by wire also truck just backfires I dont know what to do ?????????/
Teching In
Joined: Jan 2008
Posts: 49
Likes: 0
From: Sioux Falls, SD
I just finished a LS1 to LS376/480 conversion in a 2002 Camaro SS. If you want a bolt in, all your gages and transmission control, it's relatively easy. I got my injector harness adapters, 90mm cable throttle body, knock sensor harness adapters, and the 24 to 58 conversion trigger module from Lingenfelter Performance. I had to fabricate a throttle cable bracket, but I think that Scoggin-Dickey has that if you don't want to fabricate. You will have to use your knock sensors from the LS1 engine, and just screw them into each side of the block, build an extension harness for the crank sensor that will reach the other side of the engine, over the throttle body, also extend your factory crank sensor harness to the same point, and the cam sensor harness connector too. Don't use the LS3 MAP sensor, just T your LS1 MAP sensor into the vacuum port in the back of the intake. After I finished, sent it over to G Force in Houston to have it tuned, and dyno. Dyno results were 430hp at the wheels at 6000 rpm. If you want or need a more detailed answer, email me.
I'm running into the same situation with the LS3 throttle body (PN 12605109). I've read they have issues and if running an LS3 the one to get is the earlier one w/ PN 12570790. BTW.. a different harness for the later LS3 TB doesn't exist so I'm assuming it's not that simple. LS2 throttle bodies seem to work just fine.
Bringing back an old thread here. I have a Trailblazer LS2 with LS3 heads and Camaro LS3 intake. I need a throttle body & was going to go with the 2009+ LS3 one (heard it has quicker response, is pretty much ported from the factory), and like the LS3 MAF sensor (cleaner install) but i guess the LS2 controller won't work with eitherr. So was debating going with a GM LS3 controller kit. Anyone know of any reason why this won't work, or is a bad idea? The motor is a 58x setup.
if its a 58x tooth a ls3 computer will work just fine, i thought a trailblazer was 24tooth but if yours is 58 then a ls3 computer and throttle body will work just fine, but i dont see why the ls3 throttle body wouldnt work on your setup as is with the ls2, as long as you are drive by wire you should be fine
