LS7 Engines and ECM's

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Nov 2, 2005 | 05:50 PM

#21

Bill Reid

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From: Chandler, AZ

Nicky,
Have you guys determined if in fact you can physically swap in a 24x reluctor wheel onto an LS7 crank? If you have not been able to determine that, can you ask GM?

Are all the clearance specs for the assembly of an LS7 now available?

Although the Ti rods are new and relatively untested in the real world... what does GM say about their power capabilities?

Is the LS7 sump reservoir and lines available yet?

Thanks,
Bill

Nov 2, 2005 | 06:29 PM

#22

98blackSS

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From: Lexington Park, MD

Received ours late last night.. Can't wait to start working on the project

Some pics:
http://filebox.vt.edu/users/mkoch/offtruck.jpg
http://filebox.vt.edu/users/mkoch/garage1.jpg
http://filebox.vt.edu/users/mkoch/427.jpg
http://filebox.vt.edu/users/mkoch/LS7.jpg
http://filebox.vt.edu/users/mkoch/ls72.jpg
http://filebox.vt.edu/users/mkoch/ls73.jpg
http://filebox.vt.edu/users/mkoch/ls74.jpg

Nov 2, 2005 | 08:56 PM

#23

John B

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From: Phoenix, AZ

Quote:

Have you guys determined if in fact you can physically swap in a 24x reluctor wheel onto an LS7 crank? If you have not been able to determine that, can you ask GM?

The good news is yes!

Nov 3, 2005 | 06:15 AM

#24

98blackSS

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From: Lexington Park, MD

Decisions, decisions.. Todd from Dragonfire emailed me back and said his Delphi B and harness will work.. I'm just not sure what all the implications would be with the rest of the computers in the car. Maybe piggybacking the stock PCM for those functions, I'm just not sure yet.. If it were just a race car I wouldn't even worry about it.

The other solution would be to swap trigger wheels (as much work as it is) and use the stock PCM. I still need to find out how different, if any, this new MAF sensor is signal wise.

Nov 3, 2005 | 02:09 PM

#25

DavidNJ

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How about this unit?

http://www.autronic.com/page_files/sm4_kit.htm

Says it has an optional internal knock control, Flatshift, primative launch control, dedicated a/c, engine fan, and NOS control. The choice of the guy running the EFI101 classes.

Nov 3, 2005 | 02:19 PM

#26

98blackSS

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From: Lexington Park, MD

Quote:

Originally Posted by DavidNJ

http://www.autronic.com/page_files/sm4_kit.htm

Says it has an optional internal knock control, Flatshift, primative launch control, dedicated a/c, engine fan, and NOS control. The choice of the guy running the EFI101 classes.

Thanks David.. Looks interesting. Anyone running this system around here?

Nov 7, 2005 | 09:09 AM

#27

70 LS1

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From: Gig Harbor, Wa

Pardon my ignorance, but why can't you use a Z06 PCM? Are they not available? I know the LS1 PCM's are able to be made stand alone. Is this not the case with the LS7?

Nov 7, 2005 | 09:42 AM

#28

NOSjohn

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Keep the information coming guys. In a way, it's tough to believe GM didn't give a solution with the crate motor. Good = GM offering LS7 crate motor, Bad = GM not offering PCM option.

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Nov 7, 2005 | 10:25 AM

#29

98blackSS

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From: Lexington Park, MD

Quote:

Originally Posted by John B

The good news is yes!

Anyone have a P/N for the 24x reluctor? I think I'm going to go this route afterall.

Nov 7, 2005 | 11:10 AM

#30

Builder

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From: Reno, NV

Quote:

Originally Posted by 70 LS1

Pardon my ignorance, but why can't you use a Z06 PCM? Are they not available? I know the LS1 PCM's are able to be made stand alone. Is this not the case with the LS7?

Pardon mine, too. Some of the statements I am about to make may be incorrect, since my knowledge of LSx engines is limited to what I have read on various boards (disclaimer).

Your comment about the '06 Z06 PCM is correct; I am told it also requires the "body control module" to work properly. And, it's completely different than previous LSx PCMs, in terms of the programming technique and type of data entered. Since the LS7 PCM is so new, nobody has cracked the code yet (LS7edit, EFILive, HPTuners, etc.) that I know of.

The main issues, at this point, center around the fact that the LS7 is so new, not many motorsports companies have one to mess with...to see what the range of the output from the new sensors are, to get inside the PCM, to understand the power potential... Also, the reluctor on the crank for the "crank position sensor" is a 60(-2) tooth, rather than the previous LSx 24 tooth.

Lots of little issues to work out. Luckily, I have a little time as the chassis won't be ready to accept an engine for a couple of months yet.

-- Scott

Nov 7, 2005 | 12:14 PM

#31

70 LS1

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From: Gig Harbor, Wa

Wouldn't it be a temporary solution to get a PCM and body control module for an 06 Z06? At least until the aftermarket could support. Couldn't you still use the stock programming?

Nov 7, 2005 | 12:22 PM

#32

98blackSS

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From: Lexington Park, MD

It was posted earlier that the push button start circuitry is one reason of the tech issues that prevent going that route..

Plus the lack of editing software for guys like us that will be swapping cams right off the bat.

Nov 7, 2005 | 12:23 PM

#33

Gary Z

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From: Berkeley, California

In order to use a stock PCM you would also need, at the very least, a schematic diagram of the wiring harness. The C6 Z06 service manuals are not yet available.

Nov 8, 2005 | 05:59 AM

#34

Drewman

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From: Austin, TX

Forgive me if this has been discussed, but A friend sent me this link

http://www.crateenginedepot.com/stor...2-P1371C0.aspx

It also comes up at GM Parts Direct

http://www.gmpartsdirect.com/results...umber=12603892

Wouldn't you just need that module, HP tuners (or equivalent) and a harness/pinout?

Nov 8, 2005 | 08:04 AM

#35

Builder

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From: Reno, NV

Quote:

Originally Posted by Drewman

Tell you friend, "Good pull", Drewman. I haven't seen that before. If this is the stock unit, the issues haven't changed, but at least it's available to work on.

Thanks!

Nov 8, 2005 | 08:33 AM

#36

98blackSS

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From: Lexington Park, MD

I believe it's the stock unit. But as Gary and Scott pointed out though, without a schematic and way to tune it, I'm still out of luck with going that route.

Nov 8, 2005 | 01:28 PM

#37

John B

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From: Phoenix, AZ

Quote:

Wouldn't you just need that module, HP tuners (or equivalent) and a harness/pinout?

The whole issue here stems around the fact that the C6 LS7 PCm expects to see signal feedback from all of the on-board systems that it is tied to. One of the reasons that the push button start is such an issue is that the PCM expects to see this signal so until HPT or LS1_Edit can figure out how to find what this is in the PCM and offer to delete it, no dice using the PCM.

Nov 8, 2005 | 01:52 PM

#38

LSxChevelle

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From: Enumclaw, WA

Can you guys use a push button start??

Just a thought...

Nov 8, 2005 | 02:09 PM

#39

98blackSS

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From: Lexington Park, MD

Quote:

Originally Posted by 11secproject

Can you guys use a push button start??

Just a thought...

That's only one example though.. There are many other unknowns to deal with at this point in time. I'd really like to have a PCM pinout to start with..