Gen3 5.3 to Gen4 Conversion?
Thread Starter
Teching In
Joined: Sep 2017
Posts: 6
Likes: 0
Gen3 5.3 to Gen4 Conversion? So I have a Gen3 5.3 I am budget building for my 240SX with later plans to go with a Stroker LS3. More or less I am trying to see if there is a way to make this Gen3 work with a Gen4 harness. This way down the road when I drop the LS3 in I can just plug and play without buying a new harness or bunch of adapters to make it work.
From what I could devise on my own I need an LS2 timing cover with cam sensor in it, 1X upper timing gear, LS2 valley cover, and to relocate the knock sensors. Does this sound about right? Or should I just bite the bullet and leave this 5.3 spec'd out to Gen3 and buy another harness when I install the LS3?
From what I could devise on my own I need an LS2 timing cover with cam sensor in it, 1X upper timing gear, LS2 valley cover, and to relocate the knock sensors. Does this sound about right? Or should I just bite the bullet and leave this 5.3 spec'd out to Gen3 and buy another harness when I install the LS3?
Restricted User
Joined: Mar 2014
Posts: 7,192
Likes: 109
From: Ohio
The only way to use the same harness for both would be to get a Lingenfelter 58x box, that way you can use the LS3 with the 5.3 PCM/harness.
The harnesses and PCMs are completely different for gen 3 and gen 4, there won't be any other way to mix them.
The harnesses and PCMs are completely different for gen 3 and gen 4, there won't be any other way to mix them.
If your not planning on spinning to the moon ( 7500 rpm or more ) then I am a fan of the 24x system for ease of wiring and tuning support. The 58x swaps are more complex and not as user friendly ( not as many tuning options ) plus super easy to find a 24x harness/PCM. When the time comes for the new engine install a 24x reluctor and reuse all your harness/PCM. Easy and best approach imo
