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View Full Version : E40 LS2 GTO adjustments for LS3/LS7 MAF sensor conversion


ACCLR8N
January 2nd, 2014, 03:57 PM
I'm replacing my LS2 MAF sensor with the GM 15865791 card style mostly so I can extend my 4-inch intake tube and eliminate a couple pieces in my intake. For a starting point I copied values from the stock 2008 Corvette B1099 to my B1098 and interpolated for the E40 B1099 (200Hz steps vs 150Hz). With the E40 the table hits the 512g/s limit at 9800Hz and flat-lines from there. I haven't exceeded 480g/s to date.

I have read about IAT adjustments that are supposed to be made as well. I am not finding equivalents in the E40 custom OS for the A9029 ohm axis and B1088 IAT scaling tables. Is this another E40 limitation? Should I even worry about it?
ACCLR8N
January 7th, 2014, 06:25 AM
Hoping someone will share. Can you switch to an LS7 MAF with EFI Live on an E40?
ScarabEpic22
January 7th, 2014, 10:01 AM
I just checked the 06 TBSS file I have, no IAT Sensor scaling is available. I have done it with the other software, Id be happy to do it for you and send you a patched tune file, but I cant do it for free because of the licensing costs associated with it. Its just something that needs to be done once, you can still tune the MAF tables like normal just need to have the IAT scaling adjusted.
ACCLR8N
January 7th, 2014, 10:42 AM
crap. So the IAT scales are different?

Thanks for the offer. I'm already running the COS so you can't touch my file with HPT. Not that I was interested in paying a license fee just for this.
ScarabEpic22
January 7th, 2014, 12:22 PM
crap. So the IAT scales are different?

Thanks for the offer. I'm already running the COS so you can't touch my file with HPT. Not that I was interested in paying a license fee just for this.

No prob, figured Id toss it out there.

And yes, the IAT scales are different for a blade/LS7/LS3 style vs original one.

(You could always patch a stock OS, then convert it to the COS again. Food for thought it you go for it down the road.)
ACCLR8N
January 9th, 2014, 04:00 PM
Option 2: Install a break out LS1 style IAT. I have been told by a few people the earlier styles are a compatible output to the stock LS2. No adjustments needed.