LS2 vs. LS3 MAF
Safety Car
Joined: Feb 2008
Posts: 3,712
Likes: 3
From: TEXOMA
St. Jude Donor '08-'09
no, and no.
the ls2 maf is a complete unit.
the ls3 is a card style that you must make a housing for.
the connector is different, you just take apart the ls2 connector, put the wires and pins in the ls3 connector , thats done.
i did the swap and posted on here, can't find it thought,, im lazy and foot ball is on..
-Carl
the ls2 maf is a complete unit.
the ls3 is a card style that you must make a housing for.
the connector is different, you just take apart the ls2 connector, put the wires and pins in the ls3 connector , thats done.
i did the swap and posted on here, can't find it thought,, im lazy and foot ball is on..
-Carl
Thread Starter
Drifting
Joined: Sep 2000
Posts: 1,492
Likes: 12
From: Milwaukee, WI / NYC, NY
no, and no.
the ls2 maf is a complete unit.
the ls3 is a card style that you must make a housing for.
the connector is different, you just take apart the ls2 connector, put the wires and pins in the ls3 connector , thats done.
i did the swap and posted on here, can't find it thought,, im lazy and foot ball is on..
-Carl
the ls2 maf is a complete unit.
the ls3 is a card style that you must make a housing for.
the connector is different, you just take apart the ls2 connector, put the wires and pins in the ls3 connector , thats done.
i did the swap and posted on here, can't find it thought,, im lazy and foot ball is on..
-Carl
If I want to run the card type LS3 MAF with a stock LS3 air intake, bridge and coupler, should the MAF just plug into the stock LS3 intake set-up? Than it would just be a matter of reconfiguring the wiring?
Safety Car
Joined: Jan 2004
Posts: 4,974
Likes: 14
From: Pinellas Park Fl
St. Jude Donor '08-'09 & '12, '14
The connector is different, once you get a connector, ensure the wires are in right, if not, correct the wires.
should be
LS2 LS3/7
E A
A D
D C
C B
B E
Go to HPTuners Repository and grap a file for a Z06 and change your IAT table to match and then paste the values. If you don't, you will be off approx. 10 degrees.
Then, match the Injector table for the flow (IFR), resistance etc. I would use an 06 Z06 file. From 07 they changed the fuel pressure flow table from a Kpa to pressure.
should be
LS2 LS3/7
E A
A D
D C
C B
B E
Go to HPTuners Repository and grap a file for a Z06 and change your IAT table to match and then paste the values. If you don't, you will be off approx. 10 degrees.
Then, match the Injector table for the flow (IFR), resistance etc. I would use an 06 Z06 file. From 07 they changed the fuel pressure flow table from a Kpa to pressure.
Race Director
Joined: Aug 2005
Posts: 13,592
Likes: 187
From: Hudson WI
NCM Sinkhole Donor
I think this is the harness you need because you could move the pins around. I bet if you call them, they will build you what you want. Very nice people to deal with.
http://www.casperselectronics.com/st...oducts_id=1489
http://www.casperselectronics.com/st...oducts_id=1489
Last edited by timd38; Nov 9, 2010 at 06:26 AM.
Melting Slicks
Joined: Sep 2007
Posts: 2,597
Likes: 3
From: READING PA
St. Jude Donor '08-'09-'10
I think Lingenfelter has a Plug that enables you to use a LS7 MAF and
it connects to your ls2 wiring without any splicing etc and the LS3 config
is the same as the LS7 Pin for PIN.
it connects to your ls2 wiring without any splicing etc and the LS3 config
is the same as the LS7 Pin for PIN.
Le Mans Master
Joined: Aug 2002
Posts: 8,472
Likes: 38
From: Houston TX
St. Jude Donor '11
More info on the re-pinning as well as a new housing and connector: http://powrmax.com/94%20-%2006%20plug%20conversion.html
Then you will need to reclaibrate the IAT table like Glen said as well as recalibrate the MAF tables.
Not sure there is anything to be gained from doing this unless you are forced induction. LS2 guys use the LS3 MAF in a 100mm housing to gain more flow over the 12.2k frequency range.
Then you will need to reclaibrate the IAT table like Glen said as well as recalibrate the MAF tables.
Not sure there is anything to be gained from doing this unless you are forced induction. LS2 guys use the LS3 MAF in a 100mm housing to gain more flow over the 12.2k frequency range.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Safety Car
Joined: Jan 2004
Posts: 4,974
Likes: 14
From: Pinellas Park Fl
St. Jude Donor '08-'09 & '12, '14
I think this is the harness you need because you could move the pins around. I bet if you call them, they will build you what you want. Very nice people to deal with.
http://www.casperselectronics.com/st...oducts_id=1489
http://www.casperselectronics.com/st...oducts_id=1489
Safety Car
Joined: Jan 2004
Posts: 4,974
Likes: 14
From: Pinellas Park Fl
St. Jude Donor '08-'09 & '12, '14
More info on the re-pinning as well as a new housing and connector: http://powrmax.com/94%20-%2006%20plug%20conversion.html
Then you will need to reclaibrate the IAT table like Glen said as well as recalibrate the MAF tables.
Not sure there is anything to be gained from doing this unless you are forced induction. LS2 guys use the LS3 MAF in a 100mm housing to gain more flow over the 12.2k frequency range.
Then you will need to reclaibrate the IAT table like Glen said as well as recalibrate the MAF tables.
Not sure there is anything to be gained from doing this unless you are forced induction. LS2 guys use the LS3 MAF in a 100mm housing to gain more flow over the 12.2k frequency range.
In my research I found that the MAF most commonly used with the 100 mm tube is different than the LS3/7 MAF.
I doubt that I gained any power after converting over to the different MAF, but they read finer. I actually improved the idle quality and tip in response. I was able to add timing through out the table w/o knock and saw a gain in MPG, so I'm happy
Last edited by glenB; Nov 9, 2010 at 08:20 PM.
Platinum Supporting Vendor
Joined: Sep 2001
Posts: 3,665
Likes: 341
Justin
Safety Car
Joined: Jan 2004
Posts: 4,974
Likes: 14
From: Pinellas Park Fl
St. Jude Donor '08-'09 & '12, '14
Did you try calling, I have no emails about a LS2-LS3 harness issue or even a question in last couple of weeks. What is wired wrong about the harness? I have a schematic you can look at the harness or we can replace it and I will check it before it leaves. What is your email address? What email address did you send it too?
Justin
Justin
From your website listed under Sales/Customer Service or Technical Questions
This is a heads up on pt# PM-65 I purchased on 8/27. I installed the harness as instructed, you can't really screw it up since it only goes one way, and I had no MAF signal or Air Temp signal. After checking to ensure I had them plugged in and seated properly, I pulled all the wires and rewired the MAF end of the harness to get it to work properly.
The schematic I used was
LS2 LS7
E A
A D
D C
C B
B E
Safety Car
Joined: Feb 2008
Posts: 3,712
Likes: 3
From: TEXOMA
St. Jude Donor '08-'09
Platinum Supporting Vendor
Joined: Sep 2001
Posts: 3,665
Likes: 341
customerservice@zip-corvette.com
From your website listed under Sales/Customer Service or Technical Questions
This is a heads up on pt# PM-65 I purchased on 8/27. I installed the harness as instructed, you can't really screw it up since it only goes one way, and I had no MAF signal or Air Temp signal. After checking to ensure I had them plugged in and seated properly, I pulled all the wires and rewired the MAF end of the harness to get it to work properly.
The schematic I used was
LS2 LS7
E A
A D
D C
C B
B E
From your website listed under Sales/Customer Service or Technical Questions
This is a heads up on pt# PM-65 I purchased on 8/27. I installed the harness as instructed, you can't really screw it up since it only goes one way, and I had no MAF signal or Air Temp signal. After checking to ensure I had them plugged in and seated properly, I pulled all the wires and rewired the MAF end of the harness to get it to work properly.
The schematic I used was
LS2 LS7
E A
A D
D C
C B
B E
Thanks
Justin
Safety Car
Joined: Jan 2004
Posts: 4,974
Likes: 14
From: Pinellas Park Fl
St. Jude Donor '08-'09 & '12, '14
I will pull one, but I have sold at least a two dozen of these and I use one on my car and yours is the first issue I have heard of. You were using the factory GM MAF correct. I will check a new one and see what it is. The email at customer service is a good email, however I will have them look again. The server we use sometimes will label something as spam and it never hits our in house email at all. For future, we answer everything we get, so if you don't get an answer then please call because obviously we did not get your email and I apologize.
Thanks
Justin
Thanks
Justin
Platinum Supporting Vendor
Joined: Sep 2001
Posts: 3,665
Likes: 341
Ok, talked to Caspers, it does not matter how the IAT wires are, it just reads a resistance. They can be reversed and will still be fine.
Last edited by Zip Corvettes; Nov 15, 2010 at 01:43 PM.
Le Mans Master
Joined: Aug 2002
Posts: 8,472
Likes: 38
From: Houston TX
St. Jude Donor '11
I ran into this problem (wires switched) with a POWRMAF card style MAF a while back. Never figured out whether it was user error or the LS7 and LS3 MAFs had different pin outs or what.
Safety Car
Joined: Jan 2004
Posts: 4,974
Likes: 14
From: Pinellas Park Fl
St. Jude Donor '08-'09 & '12, '14
My email was meant as a heads up, not to badger.
Platinum Supporting Vendor
Joined: Sep 2001
Posts: 3,665
Likes: 341
The one you had what was it wired as, were there more wires that were not correct?
I was going to make this harness myself a couple of years ago but Caspers anteed up to make the special plug that Delphi does not. However if there is another issue with it then I need to know.
Thanks
Justin
Tech Contributor
Joined: Mar 2003
Posts: 12,094
Likes: 197
From: Colorado Springs, CO
St. Jude Donor '08-'09-'10-'11
I have a lot of info compiled here including tuning for some applications. It was suggested you use the Z06 tables and I didnt find them to work. If you use an LS3 housing, use the LS3 MAF tables.
http://forums.corvetteforum.com/c6-t...lications.html
This includes pin diagrams for wiring.
http://forums.corvetteforum.com/c6-t...lications.html
This includes pin diagrams for wiring.