True or False?
#1
True or False?
well i was talking to this guy at a dealership when i bought the ranger, and told him i was probably gonna put on some bigger tires. he said i wouldn't be able to because the speedometer would read the wrong mph and that the truck would go into abs mode and give me more problems than its worth. so i say its ok ill just get the speedometer set to the tires and he said that they cant do it on an 03+ ranger. This cant be true i think its garbage but im not 100% sure. tell me the truth.
#2
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#9
He may be right. Newer Rangers (2001-on?) have VID-Block which limits the range of tire size adjustment that can be done on a particular VIN/calibration using a Ford dealer tool. I don't think VID-Block can put any limitation on aftermarket calibration tools such as Sniper or the Xcalibrator series.
#13
I think.. I think I remember hearing that thing about the VID adjusting tool that Ford uses like above..
They can only go above so far before they cant fix the speedo anymore, and they -cant- give you new tires and install them as well...
Its liek if you go to Costco, you cant buy new tires for your vehicle and have them install it if they are over that +-7% or whatever that range was.. Its part of the law, and they are watching their own backs.
They can only go above so far before they cant fix the speedo anymore, and they -cant- give you new tires and install them as well...
Its liek if you go to Costco, you cant buy new tires for your vehicle and have them install it if they are over that +-7% or whatever that range was.. Its part of the law, and they are watching their own backs.
#16
That can’t happen. It’s a simple math equation. A larger tire size will throw the speed odometer off. The faster you go the farther off it will be. If you started with 31 inch tire and now have a 32 inch it won’t be much but it will be off. An inch larger at 60 is around 1.8 MPH.
#18
That can’t happen. It’s a simple math equation. A larger tire size will throw the speed odometer off. The faster you go the farther off it will be. If you started with 31 inch tire and now have a 32 inch it won’t be much but it will be off. An inch larger at 60 is around 1.8 MPH.
#21
#23
I’m not looking for an argument here. As I said small changes may not be noticeable at 60 or even 70mph. There is no way you can go 235’s to 285’s and have an accurate reading. A 1 to 3 mile and hour differance may not be much at all to any one individual. In particular if you are reading your guage with your eye and then looking at your GPS.
There are thousands of tire calculators on the web and even the tire stores use them. It is a simple equation; therefore if you change any variable you change the answer.
In basic algebra D=RT where d stands for distance, r stands for (constant or average) rate of speed, and t stands for time. You would want to solve the problem for r. Now that being said here is the formula for MPH.
MPH = (Engine RPM x Tire Diameter (in inches) x 0.003 ) divided by
(Transmission Gear Ratio x Transfer Case Ratio x Final Drive Ratio)
Rant over.
PS- yes I watch Mythbusters.
There are thousands of tire calculators on the web and even the tire stores use them. It is a simple equation; therefore if you change any variable you change the answer.
In basic algebra D=RT where d stands for distance, r stands for (constant or average) rate of speed, and t stands for time. You would want to solve the problem for r. Now that being said here is the formula for MPH.
MPH = (Engine RPM x Tire Diameter (in inches) x 0.003 ) divided by
(Transmission Gear Ratio x Transfer Case Ratio x Final Drive Ratio)
Rant over.
PS- yes I watch Mythbusters.
#24