Bink

I can get a complete GMPP LS3/GenIV harness and PCM for about $600 - guy bought it and never used it.

We are dropping an LS6/4L60E into a 1950 ford pickup.

Is it possible, or worthwhile, to convert the Gen IV harness to accept the Gen III engine (does anyone make a 24x-58x converter?)?

Would we be better off buying a completeGen III/ 4L60e harness and PCM from someone like Speartech or PSI??


Thanks in Advance!!

Bink

Answer my question!
Lingenfelter has a 24x to 58x conversion module for installing any early LS into late model - newer PCMs (2006 and up). Was shown at 2011 SEMA.

http://www.lingenfelter.com/LPEforum...achmentid=2359

http://www.youtube.com/watch?v=wUzNGcSiwCg

350SS

iTrader: (38)

It's definitely possible but considering that you haven't bought anything yet I would just go with a pcm/harness setup for the 24x reluctor. That way you don't have to modify the 58x harness and use add on conversion boxes. If you were getting the GMPP stuff for less money it might be worth the hassle it but for 600 I'd pass.

psiconversion

iTrader: (5)

That LS3 harness is probably also set up for a different throttle body, injectors, map, and cam sensors.

Jones'n

You realize that converter does the opposite of what you are looking for.
You are talking about putting a 58x computer on a 24x engine.
That module is for running a 24x computer on a 58x engine.

Bink

Thanks for the help!!


Can you fab adapters for the LS6 injectors as well as the LS6 map sensor??

There is an input on the conversion box for the cam sensor.


This a complete drive-by-wire LS3 "Hot Cam" harness with ECM and DBW throttle pedal. Will an LS6 Throttle body work with the LS3 PCM? Are the voltage references the same??

TIA

Jason Haines @ LPE

Actuallly the module in that video is the TRG-002-R which is designed to go in the direction the original post is looking for (running a 24x LS6 engine with a newer ECM expecting a 58x signal so 24x to 58x conversion).

Our TRG-002 has been on the market for 3 or 4 years and it converts 58x to 24x so you can put the newer engines in the older cars.

The TRG-002-R that we introduced at last year's SEMA show does the opposite.

We haven't actually released the product to the market though. We haven't had enough of the beta test customers get their project vehicles done so we don't have enough test miles on the product for us to feel comfortable releasing the product to the general public. I am estimating it will be a month or two before we release the product. We are still looking for beta test customers.

psiconversion

iTrader: (5)

The ls6 throttle body has 8 wires total, vs 6 for the ls3.

psiconversion

iTrader: (5)

The ls6 throttle body has 8 wires total, vs 6 for the ls3.

Jason Haines @ LPE

Yes, the LS6 and the LS3 electronic throttles don't have the same number of wires and use different connectors. The GMPP harness and ECM are expecting an LS3 throttle body. You could also use an LS2 throttle. You can pick up an LS3 or LS2 electronic throttle for not to much money from people upgrading to 102 and 105 mm throttle bodies. You can also sometimes get a good deal on an LS2 intake, throttle, fuel rails and injectors from someone that has converted to a supercharger system.

I think the original post has an LS6 engine so I assume they have an LS6 intake. You can't just bolt an LS3 or LS2 throttle to the stock LS6 intake due to the bolt pattern and the intake opening size. If that is the case you can bolt an LS2 intake onto those same heads and then you have the 4 bolt pattern needed for the LS2/LS3 throttle. TPIS also offers a conversion where they modify the LS6 intake to have a larger 4 bolt flange to accept the 90 mm OEM throttles.

Adapter harnesses also exist to allow a newer ECM to control the older throttle body and vice versa.

Bink

Thanks for all the help, guys!! Big Help!


We talked with Jon @PSI and we're going with their harness, PCM and cable throttle body.