Speedometer Calibration for 1995 Z28

[95Lt1]

Swapping gears from a 3.42 to 4.10 in my 95 Z28. I have already purchased the cable and that came with a free copy of tunerpro. I am completely new to this stuff and to be honest reading some of these posts give me a headache . I have no clue what BLMs or BINs are. So if anyone could tell me how to calibrate my speedo and can explain it to me like im a 7 year old that would be awesome!!

[EagleMark]

Well keep reading and you'll catch up. Maybe this will help?
http://www.gearhead-efi.com/Fuel-Inj...-a-must-read!-)


Once you've hooked up cable to tunerPro:
http://www.gearhead-efi.com/Fuel-Inj...to-TunerPro-RT


Then can read the bin file from your PCM, you can use this spreadsheet to calculate the speedo changes needed:
http://www.gearhead-efi.com/Fuel-Inj...ull=1#post2958

[95Lt1]

Thank you for the reply. Its like reading spanish. I think ill just try to find a hypertech power programmer :( thank you tho

[EagleMark]

There's a lot of words or terms you need to learn but I assure you they are English. Maybe if you take them one by one and learn the words it will come together?
http://www.gearhead-efi.com/gm-ecm-p...ictionary.html

Some people just don't have the time or desire to learn though...

If all you want done is Speedo calibration maybe you should have your PCM flashed by a tuner. They could do all the other adjustments while they are at it. It would be a bigger improvement then what is available from a hand held Hypertech type tune.

Good Luck!