LT1 to a Ls3 swap
Thread Starter
Launching!
Joined: Apr 2019
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From: Bay area
LT1 to a Ls3 swap I'm trying to figure out what all I need for this process,
I know that I need a ls1 k member and a LS steering rack in order for the ls headers to fit.
I wanted to use adapter for lt1 k member, but let know what your options are on that.
And I'm probably just gonna buy a 4l80e so installation is not so difficult.
What about driveshaft? And gear ratio? I got the stock 2.72 gears. Will that work with the 4l80e?
Also I want to know can I use a 411 ls1 pcm to run the ls3 wiring harness ? Or do I have to found the actual 2010 pcm?
And also I'm still confused on if I can use ls1 wiring harness or will it be best to get a ls3 wiring harness?
I've read that the ls3 is a DBW (Drive by wire) and i would have to swap throttle body with a drive by cable throttle body.
What else all I need? Any advice will help.
This is 1995 trans am btw
I know that I need a ls1 k member and a LS steering rack in order for the ls headers to fit.
I wanted to use adapter for lt1 k member, but let know what your options are on that.
And I'm probably just gonna buy a 4l80e so installation is not so difficult.
What about driveshaft? And gear ratio? I got the stock 2.72 gears. Will that work with the 4l80e?
Also I want to know can I use a 411 ls1 pcm to run the ls3 wiring harness ? Or do I have to found the actual 2010 pcm?
And also I'm still confused on if I can use ls1 wiring harness or will it be best to get a ls3 wiring harness?
I've read that the ls3 is a DBW (Drive by wire) and i would have to swap throttle body with a drive by cable throttle body.
What else all I need? Any advice will help.
This is 1995 trans am btw
Last edited by LT1DG; May 31, 2021 at 09:13 AM.
I replied in the other thread as well.
An LS3 will have a 58x reluctor, so you would need a signal converter to use an 0411.
In today's age, I'd go Holley EFI and not mess with the factory ECU.
Additionally, I'd start looking for a different rear and associated drive shaft, the factory 10 bolt leaves a lot to be desired.
An LS3 will have a 58x reluctor, so you would need a signal converter to use an 0411.
In today's age, I'd go Holley EFI and not mess with the factory ECU.
Additionally, I'd start looking for a different rear and associated drive shaft, the factory 10 bolt leaves a lot to be desired.
Thread Starter
Launching!
Joined: Apr 2019
Posts: 206
Likes: 11
From: Bay area
I replied in the other thread as well.
An LS3 will have a 58x reluctor, so you would need a signal converter to use an 0411.
In today's age, I'd go Holley EFI and not mess with the factory ECU.
Additionally, I'd start looking for a different rear and associated drive shaft, the factory 10 bolt leaves a lot to be desired.
An LS3 will have a 58x reluctor, so you would need a signal converter to use an 0411.
In today's age, I'd go Holley EFI and not mess with the factory ECU.
Additionally, I'd start looking for a different rear and associated drive shaft, the factory 10 bolt leaves a lot to be desired.
Is this what your talking about? 👆👆👆
I was thinking about running a 3.42 gears, and I heard that the steel driveshaft is usable, and would be good for drag racing. Correct me if I'm wrong.
Last edited by LT1DG; May 31, 2021 at 10:06 AM.
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Launching!
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Launching!
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From: Bay area
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I'll follow up with, regardless of your driveshaft and gear selection, I'd ditch the factory 10 bolt if you plan to hit the tires with any intentions of drag racing.
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Launching!
Joined: Apr 2019
Posts: 206
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From: Bay area
I'll probably do a 3.42 swap on the rear.
Also will I be able to swap a drive by cable throttle body with out issue?
You can run either DBC or DBW as you choose.
Thread Starter
Launching!
Joined: Apr 2019
Posts: 206
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From: Bay area
Sorry for the newb questions, I wanna make sure that I do this correctly.
The Holley EFI can control either one. It's in the software. Basically it's just a difference in harness connectors, either way the ECU can control either TPS/IAC or pedal/DBW stepper, it just depends on what you tell the ECU to manage. To clarify, you'd swap out your pedal assembly for a DBW pedal if you were to go that route.