Speedo Calibration through Tuning

[smoknta]

Alvin,

Have you ever tried to recalibrate the Speedometer through tuning?

Have you ever tried adjusting the Road Speed Constant or the Instument Panel VSS Pulse Divisor?

I would think you could adjust the Road Speed Constant higher for a gear change. Stock the PCM is looking for 4000 pulses/mile. Why couldn't you increase the number of pulses per mile to compensate for a higher hear ratio. Would this have an affect on any other calculations?

What about the VSS Pulse Divisor? Have you ever adjusted this? What affects does it have?

thanks

[pcmforless]

Yep, the way they have it set up you can calibrate the speedo for about 6 different ratios numerically lower than 3.23

[smoknta]

So you cant calibrate it for over 3.23?

Would increasing the Road speed Constant not compensare for a gear above 3.23?

Say 5000 pulses per mile instead of 4000.

[pcmforless]

nope

Road speed constant is for the datalogers calibration only

[smoknta]

Alright, thanks for the info.

[pcmforless]

I wish I could calibrate the speed.. I really do..

[smoknta]

I was just looking through Tunercat today and those constants got me thinking.

Once on online order is turned in, how long does it usually take you for an email tune?

[harvickgm]

there has to be a way to put it in there... you would think, come on alvin all those brains on this and you cant figure it out... you created the built in 2 step...... is there no way to add a feature?? i guess that would be really hard to do, well if i get the money to do my 6 speed swap i will be shootin you an email to get that 2 step from ya...

[pcmforless]

A email tune takes about 6-12 hours to do..

The email tune will be a nice option for your car as it can use every bit of fine tuning

[smoknta]

I just sent my order in for an email tune.
Looking forward to seeing your work.

Thanks.

Did you ever get the two-step working for an automatic car?

[Fastbird]

there has to be a way to put it in there... you would think, come on alvin all those brains on this and you cant figure it out... you created the built in 2 step...... is there no way to add a feature?? i guess that would be really hard to do, well if i get the money to do my 6 speed swap i will be shootin you an email to get that 2 step from ya...

He's been trying this ever since I started getting tunes from him, way back in 2002. It's just not possible. If you want to throw some 2.73's in I'm sure it wouldn't be a problem though. :D

[pcmforless]

I actaully think it is possible.. I just haven't figured it out yet.

[smoknta]

I'm sure if any can do it.....it'll be you.