Differences between LS2 and LS7 PCM
Differences between LS2 and LS7 PCM Are there any? Could you take a GTO PCM and hook it up to a Z06 harness and use it (with the appropriate tuning)?
If there are differences, is there any advantage to using the LS7 PCM over the LS2? More features, better performance, etc.?
Thanks,
-ch
If there are differences, is there any advantage to using the LS7 PCM over the LS2? More features, better performance, etc.?
Thanks,
-ch
Last edited by hyperion; Feb 9, 2007 at 02:11 AM.
Joined: Nov 2001
Posts: 1,707
Likes: 33
From: Anderson, Indiana
They're completely different and not interchangeable. The GTO ECM (E40) is for a 24X reluctor engine while the LS7 is a 58X reluctor engine and uses an E38 ECM.
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91 Z28 LS2 408CI, LS9 Supercharger, LPE GT7 cam, Yank3000, 3450 raceweight.
Latest numbers: 9.71 ET, 141.42 MPH, 1.40 60' , 610 RWHP Mustang Dyno
www.speartech.com
91 Z28 LS2 408CI, LS9 Supercharger, LPE GT7 cam, Yank3000, 3450 raceweight.
Latest numbers: 9.71 ET, 141.42 MPH, 1.40 60' , 610 RWHP Mustang Dyno
www.speartech.com
Joined: Nov 2001
Posts: 1,707
Likes: 33
From: Anderson, Indiana
All 06 and newer Vettes use the E38 whether it's an LS2 or LS7.
05 LS2 Vette used the E40, but there is no Z06 or LS7 in 05.
05 LS2 Vette used the E40, but there is no Z06 or LS7 in 05.
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91 Z28 LS2 408CI, LS9 Supercharger, LPE GT7 cam, Yank3000, 3450 raceweight.
Latest numbers: 9.71 ET, 141.42 MPH, 1.40 60' , 610 RWHP Mustang Dyno
www.speartech.com
91 Z28 LS2 408CI, LS9 Supercharger, LPE GT7 cam, Yank3000, 3450 raceweight.
Latest numbers: 9.71 ET, 141.42 MPH, 1.40 60' , 610 RWHP Mustang Dyno
www.speartech.com
Wow, that's a more complex answer than I was expecting. Thanks for the detailed responses.
In terms of performance or capabilities, are there any advantages to one particular PCM?
-ch
In terms of performance or capabilities, are there any advantages to one particular PCM?
-ch
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Joined: Nov 2001
Posts: 1,707
Likes: 33
From: Anderson, Indiana
True, but I think you'll see it go down as the "bastard" ECM of the new generation controllers due to its extremely limited use. Kinda like the 97-98 LS1 PCM.
__________________
91 Z28 LS2 408CI, LS9 Supercharger, LPE GT7 cam, Yank3000, 3450 raceweight.
Latest numbers: 9.71 ET, 141.42 MPH, 1.40 60' , 610 RWHP Mustang Dyno
www.speartech.com
91 Z28 LS2 408CI, LS9 Supercharger, LPE GT7 cam, Yank3000, 3450 raceweight.
Latest numbers: 9.71 ET, 141.42 MPH, 1.40 60' , 610 RWHP Mustang Dyno
www.speartech.com
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Could someone compare the 99-02 F-Body PCM to the E38 in terms of capabilities? I guess what I'm asking is: is there a compelling reason (performance, features, etc.) why I would want to 'upgrade' from the '01 PCM I have today to the newer E38? (This would be in conjunction with a new motor build, so I'd have the option to run whatever reluctor I need...)
Thanks again,
-ch
Thanks again,
-ch
Originally Posted by hyperion
Could someone compare the 99-02 F-Body PCM to the E38 in terms of capabilities? I guess what I'm asking is: is there a compelling reason (performance, features, etc.) why I would want to 'upgrade' from the '01 PCM I have today to the newer E38? (This would be in conjunction with a new motor build, so I'd have the option to run whatever reluctor I need...)
Thanks again,
-ch
Thanks again,
-ch
For the time being the 99-02 has more going for it in simplcity. It can also independantly control a automatic transmission. The 99-02 can be used with really trick OS's like Efilives Os5. I'm sure it won't be too long before the can computers catch up.
Also there are no Real Time Tuning solutions for either the E38/E40/E67 pcm's currently whereas the LS1's have an abundance of choices from our "trick" RTT custom operating systems to the moates setup.
Okay, thanks alot guys. This clears it up for me: stick with the 99-02 PCM, no real advantages (and some temporary disadvantages) to going with the newer E38 PCM.
-ch
-ch
Originally Posted by Speartech
All 06 and newer Vettes use the E38 whether it's an LS2 or LS7.
05 LS2 Vette used the E40, but there is no Z06 or LS7 in 05.
05 LS2 Vette used the E40, but there is no Z06 or LS7 in 05.
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Joined: Aug 2005
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From: Sunny London, UK
I think it has something to do with the divisors of 4 6 and 8 which means that the reluctor is more flexible and accurate for use with mulitple engine configurations.
Where 4 6 and 8 are the number of cylinders. Especially with newer stuff like VVT and DOD etc.
At least thats my recollection..
Plus with the new ve calculations boost is automatically handled and the ecm is faster so can do it on the fly without needing static ve tables etc and is more able to deal with the above stuff mentioned, perhaps even with direct injection like the solstice and the E67 ecm in it.
Where 4 6 and 8 are the number of cylinders. Especially with newer stuff like VVT and DOD etc.
At least thats my recollection..
Plus with the new ve calculations boost is automatically handled and the ecm is faster so can do it on the fly without needing static ve tables etc and is more able to deal with the above stuff mentioned, perhaps even with direct injection like the solstice and the E67 ecm in it.
Originally Posted by hyperion
Could someone compare the 99-02 F-Body PCM to the E38 in terms of capabilities? I guess what I'm asking is: is there a compelling reason (performance, features, etc.) why I would want to 'upgrade' from the '01 PCM I have today to the newer E38? (This would be in conjunction with a new motor build, so I'd have the option to run whatever reluctor I need...)
Thanks again,
-ch
Thanks again,
-ch
Basically the main advantage of the newer PCMs is support for other applications running on the car. More crappy subsystems which you don't need unless you are retrofitting alot of stuff onto your project car! They don't really do a better job of running the engine.
Maybe you might want it because I mean seriously GM worked on our stuff 10 years ago. It is ancient. No one at GM even knows what the 2002 Camaro OS is.
The only performance advantage of the newer operating systems is floating point calculations: No 512.x grams/second limit on the MAF. That could be done on our older PCMs if someone had the time and knowledge of the hardware.
