Switched gears and my speedo is about 10-15 mph off. I've spent several hours on searches and all the info I turn up is about LT1edit or tunercat.....nothing about tunerpro. The wheel or gear size options that are mentioned in the other threads, I cannot find in the tunerpro software.

What I can find is a speedometer scaler, a speedometer scaler,fraction, and a time between pulses for stop, not positive the last one has anything to do with the speedo. These are all in the constants sections.

Am I just overlooking something here?

If not familiar here is the info......

http://www.supportfitness.com/mark/tunerpro/
http://www.moates.net/fileman/index....neral%20Motors
http://www.tunercat.com/tnr_desc/do_tc.html

 

Yeah those values are what you change to calibrate it. You basically need a converter to tell you what the right values are for your setup. If you can't find that in tuner pro, post your gear ratio and tire size and I'll tell you what to set them to.

 

17x11 315 35 17 3:42 gears

Don't suppose you'd mind mentioning the other popular gears would you?
2:73
3:23
3:42
3:73
4:11


or maybe how you go about coming up with the figure?

 

I just use the calibration tool in tunercat, i don't know what the formula is or how it calculates it.

Oh also, is it a4 or m6?

 

it's an M6.


I really appreciate the help by the way.

 

is there anyone out there that can help me?

I'll post my info again

94 firebird, M6, using 17x11 with 315. 3:23s and 3:42s is what I'm interested in.

 

3.42 3.23


Scaler 12 11

Scaler Fraction 1.018 .988

Scaler Scantool 46.227 43.659

Time Between Pulses For Stop 76.35 80.841

Pulses Per Driveshaft Rev. 17 17

These values are from Tunercat for 94 M6.

 

That didn't come out like I typed it but the first value for each item is for 3.42 and the second is for 3.23.

 

I really appreciate your help, thanks