IAT sensor conversion

[lstoys]

I'm new to HP tuners and have been trying to read a ton of info in a very short amount of time. There's one thing so far that has me stumped. I have a 2003 5.3 that I put an LSA supercharger on with a ZL1 intercooler lid. I'm trying to use the IAT sensor in the lid. The ZL1 computer uses resistance as the x-axis in the table. The 5.3 computer uses % as the x-axis in the table. Does anyone have the values that will correctly calibrate the ZL1 IAT2 sensor to work with the 5.3 computer? Thanks for any help

[MikeOD]

http://www.hptuners.com/forum/showth...-never-changes

[lstoys]

Thank you. I think I'm going to change the port on the supercharger lid to 3/8 pipe and use a syclone IAT sensor. From what I have read, the scaling on it should work with a gen 3 computer? That way I don't have to use the pull up resistor and calculate the scaling to use the ZL1 IAT sensor.

[jgfnova]

Thank you. I think I'm going to change the port on the supercharger lid to 3/8 pipe and use a syclone IAT sensor. From what I have read, the scaling on it should work with a gen 3 computer? That way I don't have to use the pull up resistor and calculate the scaling to use the ZL1 IAT sensor.

Did you ever get this figured out?? I am doing the same thing. 2000 GMC Sierra, LSA blower, P59 PCM and ZL1 IAT in lid. I have read with the ZL1 sensor the stock Ls1/Ls6 IAT curve will work, but I have no idea.

[Alvin]

This is a very old thread. The LSA IAT (not in the MAF, but in supercharger) and the stock LS1 IAT calibration is the same.

[jgfnova]

This is a very old thread. The LSA IAT (not in the MAF, but in supercharger) and the stock LS1 IAT calibration is the same.

Thank you for confirming!! I tried using the LS3 MAF IAT scale but my reading was 20+ degrees low. Since I will be using the LSA IAT in the lid I will load the LS1 IAT calibration and see if this corrects the reading.

One question- the LS1 curve looks like the reading at 0 percent is 126.1 degrees- what happens if air temp is over 126 degrees? Sorry if this is a silly question. I have a high quality HX but if ambient is 100 degrees I would think IAT temps could easily exceed 126 in a max effort situation. Thanks again for the help.

[blindsquirrel]

The LS3 IAT is the one in the MAF, and it's a 50K thermistor. All the 2-pin IATs that screw in are 100K.

[blindsquirrel]

One question- the LS1 curve looks like the reading at 0 percent is 126.1 degrees- what happens if air temp is over 126 degrees? Sorry if this is a silly question. I have a high quality HX but if ambient is 100 degrees I would think IAT temps could easily exceed 126 in a max effort situation. Thanks again for the help.

Make sure you don't have the units changed to *C. And make sure you're looking at a stock file - all of them I have show 283.8 *F at 0%.

[jgfnova]

Make sure you don't have the units changed to *C. And make sure you're looking at a stock file - all of them I have show 283.8 *F at 0%.

That's the difference!!! I was looking at a *C chart- MUCH APPERCIATED!!!