Please someone with a M6 3.42 gears tell me your scalar,fractional, numbers etc, Also it would be great if you still
run stock 245/50/16 .

Using tunercat i have tried from 770-812 revs per mile and tire
settings of 245/50/16 255/50/16 with 3.42 and 3.23 gears.

but I can't hit it right, I go 5 over or 5 under everytime. I am checking agiainst my 2 stock vehilces and mile markers. Why
can't I hit the middle?

I'm 99% sure it's 3.42 GU6, I have rotated the DS to wheels and got almost 3 1/2 turns.

Please tell me you stock numbers.

 

Yep GU6 is 3.42s .....You should be able to plug all the info into the speedo calculator and then apply it.

 

Yeah I wish! It aint working, plugging in all the corect info has me going 75 when it shows 70, ie I am cruising at 70 in a 65 thinking all is cool when the light come on for 75 in a 65. The speedo numbers are off.