TurbopigB4C

iTrader: (5)

Does a 2006 LS2 have a 24 or 58 tooth reluctor on the crank?

HSV-GTS-300

2006 Corvette LS2 has 58x
2006 GTO LS2 has 24x

TurbopigB4C

iTrader: (5)

I wonder why they did that. So to put a 2006 ls2 corvette longblock into my f-body I would need the lingenfelter converter box.

HSV-GTS-300

They used 2005 spec LS2 engines in 2006 GTO's probably to use up the stock. Shipping time of engines to Aus and completed cars back from Aus to USA could have had something to do with it.

Converter box or change out the crank and cam reluctors.

Gray86hatch

iTrader: (83)

USe the converter box the 58 is a much better set up. The 24 two wheel stuff is not used anymore for a reason.

Tim

Jason Haines @ LPE

GM didn't make a clean change over when the switched from the Gen III to the Gen IV small block engine. They made the ECM and reluctor tooth count change over at different model years within the vehicles (for probably a host of emissions, manufacturing, inventory, model year change out etc. reasons).

A few more LS2's to add to the list:

• 2005 Corvette LS2 has 24x
• 2006 Corvette LS2 has 58x
• 2006 CTSV LS2 has 58x
• 2006 Trailblazer SS LS2 has 24x
• 2007-2009 Trailblazer SS LS2 has 58x
• 2005-2006 SSR has LS2 24x
• 2005-2006 GTO has 24x

Page 12 of our 58x to 24x converter box (TRG-002) instructions has a good chart showing what vehicles have what reluctor wheels:

The instructions can be downloaded here.

Page 11 has good pictures of the different wheels/cam gears as well.

The crank sensors are different so that can sometimes help you identify which engine you have (you can also look inside the hole when you remove the crank sensor and you can remove the front timing cover to see the cam gear):

• The 58X CKP sensor (GM part # 12585546) is gray in color and has a different connector key than the 24X CKP sensor.
• The 24X CKP sensor (GM part # 12560228) is black in color and will NOT work with the 58X crankshaft reluctor, so you cannot use the sensor from your existing Gen III V8 engine.

As noted above, the sensors are designed to work with the specific tooth count so if you swap engines and don't change the reluctor you need to keep the correct sensor for that gear (if you change wiring/ECM or you our converter box).

The 24x system works perfectly well so if you have access to a 24x reluctor engine or are taking the engine apart anyway, I would recommend changing to the 24x reluctor wheel. If you aren't planning on taking the engine apart and you already have a 58x reluctor engine, then our converter box is a simpler/lower cost way to make the swap.

Hope this helps.

Mike454SS

iTrader: (4)

Were any of the 24x versions controlled with an E38 or were they all run with the E40 and E67?

Mike454SS

iTrader: (4)

...and are all the 24x LS2's a 1x cam signal?

Sales2@Texas-speed

iTrader: (5)

All the 24x crank reluctors correspond with a 1X cam reluctor!

Jason Haines @ LPE

No, none of the 24x engines were controlled by an E38 or an E67.

The E38 and the E67 ECMs are both only used on 58x Gen IV V8 engines (as well as 4 cylinder and 6 cylinder applications).

The 24x Gen IV engines were controlled by the E40. The earlier 24x engines were controlled by the Warren (Delphi) PCM.

Mike454SS

iTrader: (4)

I have a tune for a 2006 TBSS for an E67 (I could be mistaken...but I'm pretty sure it's an E67) on my PC at home...I'll upload it tonight. Is it possible that some 2006 TBSS's were 58x?

Mike454SS

iTrader: (4)

I was wrong...it's a 2007 TBSS. I tuned it almost 2 years ago and just forgot.

Halon330

iTrader: (7)

Hey guys, I just picked up a LS2 from an '05 'vette. I was expecting to need to replace the crank or replace my PCM. Looking to do a little research and choose a direction I found this thread and see that a 2005 should have a 24 tooth reluctor. So now that issue is behind me, are there any incompatabilities with the PCM in my 2000 Fbody and that engine. I'm assumin my harness will be OK for the swap. I found another thread that was very detailed, meant for LS into non LS cars, but seemed to be good information. Guy said that the 4.8 to 6.0 were common platform. Do any of you guys know any issues I need to plan for going ino this swap concerning the harness/electrical/PCM?

Hope you guys don't mind the hijack, let me know if I need to take the ? to a new thread.

Thanks,
Tim

Scoggin Dickey

iTrader: (34)

Make sure you put the right pilot bearing in it before installation if you have a T56 car. If it came from a manual trans car it's got the wrong one in it to use with your T56.

You'll also need a cam/knock sensor harness.

If you use the LS2 intake you'll need a map sensor extension harness.

Don Nguyen

iTrader: (2)

I am trying to figure out if a 2005 LS2 engine wiring harness will work fine on a 2007 LS2 engine. Kind of reverse of what people are trying to do.

Jason Haines @ LPE

Don,

All 2005 model year LS2 engines (GTO, Corvette, SSR) were 24x reluctor wheel engines and use the E40 ECM.

All 2007 model year LS2 engines (Corvette, CTSV, Trailblazer SS) are 58x reluctor wheel engines and use the E38 (Corvette) or E67 ECM (CTSV and Traiblazer SS).

2006 is the confusing model year since it depends on the vehicle platform (2006 Corvette and CTSV are 58x, 2006 GTO/SSR are 24x).

At the end of our TRG-002 instructions we have a chart that shows the different reluctor wheels by make, model and year vehicle. Click here to see that document.

The 2005 LS2 wiring harness won't work on the 2007 LS2 engine since the 2007 ECM (E38 or E67) won't work on that engine. The ECM connectors are different as is the crankshaft position sensor connector. You could change those connectors but why bother. Get the correct harness for the correct year engine if you are going to go that route.

You are basically trying to control a newer engine with an older ECM (I am assuming you have an ECM to go with that harness). That happens fairly often and is the reason we developed our TRG-002.

Options are:

• change the reluctor wheel to a 24x crank reluctor wheel and 1x cam gear and change the crankshaft speed sensor (you can keep the same camshaft position sensor)
• get a different wiring harness and ECM (E38 or E67 based)
• use our TRG-002 to convert the 58x crank/4x cam signal from the 2007 engine to the 24x crank/1x cam signal the 2005 ECM is expecting to see

Don Nguyen

iTrader: (2)

Thanks for the indepth response. Looked up the converter on your site. Looks like a fairly viable option for a good price if I have to go down that route.

-Don