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Can you use the tuner to adjust the speedometer to a new tire size?

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Old 01-17-2008, 10:07 PM
  #21  
Stoenr
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Default RE: Can you use the tuner to adjust the speedometer to a new tire size?

Its a neat way to keep the miles down on the car. set the tallest tire, and tallest gear.
when doing 50, it reads 30 or so.
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Old 01-17-2008, 10:10 PM
  #22  
thewarmachine
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Default RE: Can you use the tuner to adjust the speedometer to a new tire size?

The change in speed is not a certain mph...like 3mph. It is a percentage of the speed you are going. For a while I was running 295/45/18 out back, and, if I remember correctly, that came out to be 5% off. Meaning, my speedometer would read 100mph, but my actual speed would be 105mph...that is, if I had not adjusted the revs per mile with my SCT2.


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Old 01-17-2008, 11:19 PM
  #23  
FyouGitive
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Default RE: Can you use the tuner to adjust the speedometer to a new tire size?

Here's a comparison among four sizes that are close to original wheel rpm per mile:

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Old 01-17-2008, 11:29 PM
  #24  
Sirsilent
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Default RE: Can you use the tuner to adjust the speedometer to a new tire size?

what is TPMS?
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Old 01-17-2008, 11:44 PM
  #25  
Stoenr
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Default RE: Can you use the tuner to adjust the speedometer to a new tire size?

Tire Pressure Monitoring System
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Old 01-17-2008, 11:47 PM
  #26  
Sirsilent
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Default RE: Can you use the tuner to adjust the speedometer to a new tire size?

and why would I want to disable that?
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Old 01-17-2008, 11:54 PM
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ThumperMX113
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Default RE: Can you use the tuner to adjust the speedometer to a new tire size?

Because it sucks.
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Old 01-18-2008, 08:07 AM
  #28  
SuperSonic05
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Default RE: Can you use the tuner to adjust the speedometer to a new tire size?

ORIGINAL: ThumperMX113

Because it sucks.
lol, but why does it suck
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Old 01-18-2008, 05:25 PM
  #29  
EricM
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Default RE: Can you use the tuner to adjust the speedometer to a new tire size?


ORIGINAL: Blue 05 Mustang

ORIGINAL: ThumperMX113

Because it sucks.
lol, but why does it suck
Because when you get aftermarket wheels you have to switch the sensors over or get new sensors. And it doesn't really work that well. I definitely wouldn't rely on it to tell me my pressure's low.
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Old 01-18-2008, 05:56 PM
  #30  
NyFordTech
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Default RE: Can you use the tuner to adjust the speedometer to a new tire size?

Brenspeed has a video on there website on how to change parameters.
TPMS cant be shut off
people wanna turn it off cause they get aftermarket wheels with no sensors, i just hit the re-set button on my dash(only if you have IUP) and it dosnt go on again till you re-start the car
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