Quick Double Nickel

iTrader: (5)

Will a LS1 computer and harness from say an F-body work on an LS2 or L92 motor? How much work on the harness is required for the cam phaser, injectors, knock sensors or anything else? Thanks,

Brad

See5

iTrader: (53)

It will work fine and has been done many times.. You can buy premade adapter harness for knock sensors and cam sensor. Except 06 and 07 due to reluctor.

Justin @ EAD Performance

iTrader: (33)

As long as you have a matching PCM and harness, any combo will run any LSX motor.

To use an LS1/LS6 pcm/harness on an LS2, you will need a a knock sensor extension harness along with LS1/LS6 knock sensors, and also a cam sensor extension harness.

Other than that, everything should swap with no problems. The rest of the sensors are the same as far as the PCM is concerned except for some of the newer LS2/LS7s with the different crank reluctor wheel.

I'm using a 5.3 harness/pcm in my 1998 1500 with an LS2 swap.

Quick Double Nickel

iTrader: (5)

So, essentially the cam sensor and knock sensors are the same, just in a different location? If I get a custom harness say from Speartech, I'm assuming they can just add the extra length needed for these sensor locations into the custom harness. What engines have the different reluctor wheel? Can the reluctor wheel be changed?

Katech_Jason

iTrader: (19)

1997-2005: 24x crank, 2x cam
2006+: 58x crank, 4x cam

You can change it but the crankshaft needs to be out.

Quick Double Nickel

iTrader: (5)

Will the early model (LS1) ECU control the knock sensors? I read somewhere that it will not. (SDPC) I just want to be sure.

Time2Kill

iTrader: (49)

The LS1 ECU will NOT control the LS2 knock sensors. You need to buy LS1 style knock sensors

Time2Kill

iTrader: (49)

Speartech can add the extra length needed to the harness. Just make sure that you are using LS1 style knock sensors.

dead2me

iTrader: (7)

so if you guys don't mind clarifying...

where can one source the necessary extensions for the harness?

is it necessary to change the reluctor wheel in a 2006 LS2 to a different style, say from the LS1?

thanks for the info... you guys are very helpful... I bow to your knowledge of such swaps....

Time2Kill

iTrader: (49)

Racetronix makes some very nice extension harnesses with high temp loom on the wires as they knock sensor harness will be running right under the manifold/headers. I believe Thunder Racing carries them.

If you have an '06 or newer LS2, then yes, the reluctor wheel must be changed on the crank as the LS1 style PCMs can not read the signal.

dead2me

iTrader: (7)

I had a feeling that was the answer regarding the reluctor....

thanks for the info....

Speartech

iTrader: (14)

As far as changing the reluctor wheel goes.....it really depends on what your project is. If you are puting a 58X reluctor engine into a 98-02 F-body or 97-04 Corvette then yes you should change the reluctor wheel and use the LS1 PCM so that the entire car functions normally. If you are doing a project into an older car using a 58X reluctor engine I see no real good reason to tear the engine all apart and change to the 24X reluctor.

We are building and shipping 58X harness/computer systems every day and they run great! We are using the production Corvette ECM (E38) and it's a nice small computer for easy mounting, and is really a slick system. Full GM diagnostics and everything. Some people are under the assumption that if you have a 58X engine you have to change it over to 24X, and for hot rods, street rods, street machines, etc., you don't!!

Also, the breakdown of 24X vs. 58X engines is NOT as simple as saying 2006 and newer is 58X.

06 Corvette LS2/LS7 = 58X
06 GM crate engine = 58X

06 GTO and 06 Trailblazer SS LS2 are carryover 24X engines with the E40 ECM!

07 Traiblazer SS is 58X
07 GTO didn't happen (I think)

Not everybody needs to tear apart that brand new crate engine for a reluctor wheel change!

dead2me

iTrader: (7)

so if I followed your posting correctly, I can run one of your PCMs and get by without performing any surgery if I have Vette LS2 or 06 Crate LS2

but as the LS2 in question is out of an 06 GTO

06 GTO and 06 Trailblazer SS LS2 are carryover 24X engines with the E40 ECM!

then I can get by with a normal LS1 ECM as the GTO LS2 for 2006 is a 24x. Correct?

btw.. what does one of your "ECMs to go" run price-wise?

thanks again for all of your help...

silicone boy

So, I'm confused. the world won't come to an end if I don't change over to an LS1/LS6 reluctor? What's gonna happen, worst case scenario if I don't?

See5

iTrader: (53)

You are right the world won't end.
However, your engine will never run.

Speartech

iTrader: (14)

Yes, you can run that setup with the LS1 PCM, or you can keep the E40 ECM that it came with (if you got it that way). Our reprogrammed LS1 PCM's are $450 outright (no core needed).

Speartech

iTrader: (14)

It just depends on what your project is. If swapping into a factory car that originally had an LS1 then you should change the reluctor so everything in the car operates normally (traction control, gauges, etc.). If you are doing a hot rod, street machine, etc., then no need to change. Just set it up using the new Corvette computer designed for the 58X engines.

dead2me

iTrader: (7)

I won't be getting the ECM from the GTO, just the complete long block...

So the 2006 GTO being a carryover with the 24X will be able to be properly managed by the LS1 ECM as long as I purchase the appropriate harness extensions and swap the knock sensors from an LS1...... and perform any appropriate tuning etc... correct?

I think I will owe someone dinner or beer here....

RiceKilla

iTrader: (15)

Another thing people have done for the knock sensors is tapping the LS2 locations to m10X1.5 so that the LS1 knock sensors just screw in. You can extend the wires yourself and purchase the heat covers for the wires.

jmilz28

iTrader: (13)

This is my understanding but I'd love to hear the final answer on this too. There may also be a TB issue though...as far as connecting the gas pedal itself. I forget what it is but I know someone makes a TB that fits but has the cable brackets to fit Fbods. Right?