-
Did I do this right????
I just installed HPT for my 04 Silverado with a 4.8L and 5sp tranny. I notice that I could not change my tire size, looking through the fourm I found the manual way to change it. I have 255/45/R20 (29) wheels and my Stocks were 235/75/R16 (29.9). 3.73 rearend.
Heres what I did
255/45/R20 29*3.14 (pi) = 91.06 inches
63360/91.06= 695.80 * 3.73 = 2595.3525 is my trans rev/ per mile
235/75/R16 29.9*3.14 (pi) = 93.886 inches
63360/93.886 = 674.86 * 3.73 = 2517.2315
For my VSS pluse per mile I took 2595.3525/2517.2315=103103
or is it 2595.3525*40 (rev-trans) which = 103814. Which is correct??????
When I put these values in the program changed them alittle such as 2595.3525 was change to 2595.3514 and 103103 was changed to 103102
Why did the program do that??
Sorry for the long post, Im just alittle confused.
-
Trans revs/Mile * VSS Multiplier (40 in this case) = VSS Pulse per Mile
The minor changes are based on the resolution of the vss system itself. And that tiny change won't make any difference. :D