Which mask? $31, $0E, or $0D?

95gmc_sierra · Post by **95gmc_sierra** » Sun Apr 27, 2014 1:09 pm

I am confused in which mask/xdf/ads file to use for my truck. If I understand what I have read, then I think the correct mask, xdf and ads file is a first step to make... I don't want to tune into or with an incorrect mask or definition... There will be enough unintended screws ups to learn and fix to be starting off with bad definitions and masks

The truck is a 1995 GMC Sierra 2500 with the 7.4 liter and 4l80e and big rear end. The stock ECM is a 16197427 BMHM

The motor has been rebuilt with flattop pistons (9.2:1), edelbrock 60499 RPM high comp heads, and an edelbrock MPFI. The cam is now a roller cam from comp cams extreme 264 (mild).

So which mask, XDF, and ADS file should I use and how do I read that info off of the existing chip programming?

These following are the three masks with multiple XDF and ADS download options from the tunerpro download section and I do not know the differences and applicability between each type.

I guess it starts with:

what are the differences between the three different masks, $31, $0D, and the $0E?

Which of the three different masks is applicable to my vehicle and conversions?

Which XDF and ADS files should I use with the correct mask?

Thank you

http://www.tunerpro.net/downloadBinDefs.htm

$31
16197427
16156930
31.xdf
V5 ONLY -31_tpv5_v250.xdf
31.ads
V5 ONLY -
A219_0E_31_v250.adx
A220_0E_31_Trans1_v250.adx
A220_0E_31_Trans2_v250.adx
95 C/K Truck/Van 5.7/7.4L
95/96 Hummer H1 (Gas)

$0E
16196395
16197427
0E_tpv4_v200.xdf
V5 ONLY -0E_tpv5_v250.xdf
V5 ONLY -
A219_0E_31_v250.adx
A220_0E_31_Trans1_v250.adx
A220_0E_31_Trans2_v250.adx
94 5.7L and 7.4L Heavy Duty truck/van

$0D
16197427
0D_tpv4_v200.xdf
V5 ONLY - 0D_tpv5_v250.xdf
0D.ads
V5 ONLY -
A217_0D_v250.adx
A218_0D_Trans1_v250.adx
A218_0D_Trans2_v250.adx
94-95 C/K 4.3L, 5.7L & 7.4L

Post by **Mangus** » Mon Apr 28, 2014 9:16 am

If you have access to the stock calibration, the best way to find out is to the look at the byte at offset 08 in the bin. It will likely be either 0D or 31, if the ECM is from a '95. OE was used in earlier models.

It's important that you use the XDF that matches the bin you're starting with. Provided there are no other mechanical issues and you're still using the stock closed loop setup (O2 sensor, etc), I'd expect the truck to run reasonably well without much change to the tune beyond pulling some full out.

Post by **robertisaar** » Mon Apr 28, 2014 9:30 am

i have a BMHM BIN in my archive and it looks to be $31.

95gmc_sierra · Post by **95gmc_sierra** » Mon Apr 28, 2014 11:07 am

Thanks folks. Most appreciated

John