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The gear/tire tab is there but after clicking it the screen shows as only adjust with a 1.0 box. I've sew pictures and videos having tire/gear ratio and adjust but this one is only just adjust. What gives?
I select calibrate(something lIke that) when accepting credit for the program.
There seems to be no Gear/tire wizard anywhere in my VCM Editor. It’s supposed to be under the EDIT Tab but it’s not. Any idea why it’s not there or where I can find it?
Under Speedo, there's VSS/Trans per rev box. I'm presuming this is the one to change the speedo correction, What is the formula for gear ratio? I found info for tire height change though.Quote:
Originally Posted by What?
PPM= Pulses Per Mile
Diameter= The Diameter of the Tire
PPM x (Old diameter/New diameter)= new PPM
Example:
24212 PPM x (25"/23")= 26392 PPM
What are the formulas for me to configure each of these category? Trans/Rev under the gear/ratio tire size and the sensor calibration for vss pulse per mile and vss trans rev per mile.
Here's an example of another stock model set up I copied to input in mine
using Manual Trans, 16 factory 235 55 16 with 3.73
Gear Ratio/Tire Size
Drive Sprocket Ratio 1.121:1
Trans Rev per Mile 4,133.4359
Sensor Caliberation
VSS Pulse per Mile: 118,912
VSS Trans Rev per Mile: 4,808.2287
to Auto, 15 factory 205 75 15 with 4.10
Gear Ratio/Tire Size
Drive Sprocket Ratio 1.000:1
Trans Rev per Mile: 5,069.4328
Sensor Caliberation
VSS Pulse per Mile: 125,952
VSS Trans Rev per Mile: 5,067.4525
I copied the same numbers from Manual setup onto the Auto setup but left the Drive Sprocket alone. I went from 4+mph off to 1.5+ mph off
Based of
https://forum.hptuners.com/showthrea...r-bigger-tires
https://forum.hptuners.com/showthrea...ghlight=speedo
Thanks to Chad from HP Tuner for the guidance
Based of
https://forum.hptuners.com/showthrea...r-bigger-tires
https://forum.hptuners.com/showthrea...ghlight=speedo
Thanks to Chad from HP Tuner for the guidance
ECM reads 60mph while I'm at 66mph
60/66 = 0.9090909090909091 multiply to original Trans Rev per Mile (5,069.4328 ) = 4608.575272727273
GPS and Speedo now reads correct.
I can't seem to find the tire wizard that I see posted everywhere on the internet. My gear tire wizard only offers me one input Gear/Tire. There is no place for me to enter tire sizes, gear ratios, nothing. I'm supposed to know the number for my customer's car and I just plainly don't I suspect that the car has a replacement speedo as the diff ratio is the same as the option RPO code which is 2.08. The current number in the gear wizard is 8.02 but I have no idea how this number was derived.Quote:
Originally Posted by Jimlove9771
The car is a 98 Camaro convertible with a 3800. Wheel speed sensors all indicate 55 mph with GPS reading 56. I'd be fine with that but the VSS and the speedometer rear 78 MPH! My customer brought it to me because I had done tunes on several of their cars. I'm completely clueless and I'm hesitant to even buy credits for the car. since these ratios also effect the transmission which works okay, (I think that it's shifting way too soon at low throttle) any help would be appreciated.
I believe you are supposed to divide your tire height by your rear gear ratio and input that number.Quote:
Originally Posted by info@gallatinautorepairs.
Winter is different. It's a clich?, but it's the principle that tire company engineers use to develop their products.