L5P interchangeability?

Leadfoot

Leadfoot

Needs Bigger Tires!
Dec 27, 2006
905
31
28
50
Western MA
www.matpa.org
Still Curious...

I know Banks has been doing some testing and there was talk of manufacturing an aftermarket block that could be used on all previous generations (assuming they have looked into incorporating the L5P changes as well if possible to make it as universal as possible).
 
Leadfoot

Leadfoot

Needs Bigger Tires!
Dec 27, 2006
905
31
28
50
Western MA
www.matpa.org
Still curious as I now have a blown head gasket in my original motor. I do have a spare complete motor (minus turbo) with a cracked piston, and a spare block with messed up main caps. Obviously replacing with a complete LBZ or long block LBZ would be "easiest", but I'm willing to be guinea pig as the L5P shortblock should exceed ALL my needs (stock turbo) utilizing my top end with head studs and a few custom parts to mate them.

I'm willing to be a guinea pig over the winter (start lining up parts now) if those "in the know" think it can be done, to see if a L5P shortblock can be used as a replacement for earlier engines (in my case an LBZ).

The things I've come up with for hurdles that should be easily fixed with people like Guy and ProFab and others:
Longer pushrods due to increased deck height, unless lifters have changed too (should be easy when lengths are known and compared)
Modified Y bridge due to the taller deck height (or spacers like we used on tall deck BBC's)
CP3 hard line to rail as rail will sit higher and farther out (not sure if there is enough flexibility of the stock one)
Rail to rail line (can't remember if it's a hard line or not)...
Verifying LBZ CP3 will work within the L5P block???
and the hardest would be getting the reluctor to work as it's in the rear of the block vs front and not sure of tooth count/orientation on L5P (??tooth) vs LBZ (58 tooth). Not sure of connector differences or what if anything needs to be done physically to make it work.

thoughts??

Does anyone know the tooth count on L5P reluctor?
Does anyone know if the reluctor connector is the same or not as on previous models?
 
2004LB7

2004LB7

Super Moderator
Staff member
Dec 15, 2010
8,554
3,059
113
Norcal
What about just using the whole engine minus the ECM and using your LBZ ECM? Seems like a lot less work and you gain some additional benefits like higher flowing heads

Based on this thread, it looks possible
www.duramaxdiesels.com

L5P - ECM Swapping Options

I'm gonna toss this here since it's currently a technical study. But hopefully this helps with stand alone and engine swaps going forward. So please add anything of value along those lines. Last year I had the change to check out some "stand alone" L5P's being controlled by E35 ECM's. When GM...
www.duramaxdiesels.com www.duramaxdiesels.com
 
Leadfoot

Leadfoot

Needs Bigger Tires!
Dec 27, 2006
905
31
28
50
Western MA
www.matpa.org
2004LB7 said:
What about just using the whole engine minus the ECM and using your LBZ ECM? Seems like a lot less work and you gain some additional benefits like higher flowing heads

Based on this thread, it looks possible
www.duramaxdiesels.com

L5P - ECM Swapping Options

I'm gonna toss this here since it's currently a technical study. But hopefully this helps with stand alone and engine swaps going forward. So please add anything of value along those lines. Last year I had the change to check out some "stand alone" L5P's being controlled by E35 ECM's. When GM...
www.duramaxdiesels.com www.duramaxdiesels.com
Click to expand...

I think running a complete L5P in my current chassis might be more of an issue from the statement I copied below (if it was a standalone, it would probably work OK):

I've also noted some of the LBZ HSGMLAN data is slightly different from the LMM. Though probably not an issue, the main problem I find with LBZ is some missing sensors like EGT probes that we know the LMM and L5P both uses. I'm pretty certain an LBZ would run a L5P in stand alone just fine, but as for a direct ECM swap, likely be much harder than the LMM.
 
juddski88

juddski88

Freedom Diesel
Jul 1, 2008
4,659
130
63
Chesterfield, Mass.
You have the option of not running those sensors Chris. So it would not be an issue. I am working on a conversion harness as we speak to E35b for a 2019....but to be completely honest, you are going to be time and money ahead just doing refresh.
 
You must log in or register to reply here.
Top Bottom