jasonberkeley

I'm putting an LS3 in my 2005 C6. Is the LS2 MAF sensor the same as the one that comes on the LS3?

If not, is the connector the same?

Thanks,

Jason

carlrx7

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

jasonberkeley

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?

glenB

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.

timd38

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

LSCHLEM

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.

5 Liter Eater

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.

jasonberkeley

Thanks everyone!

I'm converting a 2005 LS2 car to an LS3 for SCCA T1.

glenB

I bought the harness from ZIP, which is probably Caspers, it was wired wrong. I sent an email to ZIP about 3 weeks ago and still no response. So *****'m, won't be buying from them again.

glenB

The tip about IAT temps reading different I got from one of your posts over @ HPTuners, thanks for posting it.

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

Zip Corvettes

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

glenB

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

carlrx7

your lucky day.

http://forums.corvetteforum.com/c6-f...m-maf-ls2.html

Zip Corvettes

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

glenB

No problem, the emailwas sent as a heads up. This was a factory 07 LS2 MAF to a factory 07 LS7 MAF #15865791

Zip Corvettes

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.

5 Liter Eater

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.

glenB

We can go round and round, the bottom line is that the PCM was not seeing the MAF signal or IAT.

My email was meant as a heads up, not to badger.

Zip Corvettes

I did not take it as that. I am relaying what Caspers told me yesterday when I pulled one off and found two wires reversed which was the IAT.
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

SpinMonster

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.