Top Speed Limiter?

Still thinkin · 09-21-2005, 09:20 AM

I replaced my worn out stock tires with slightly shorter(but wider) tires.
I am positive I remember the truck govorning at exactly 180 kph. Now with the shorter tires it governs at approx 177/178 kph on the speedo. Could our truck possibly have a rev limiter in the particular gear that it reaches these speeds at?

johnnyscarecrow · 09-21-2005, 01:52 PM

if you change wheel/tire size, isn't it recommended to re-calibrate speedo?

mopar · 09-21-2005, 06:47 PM

Quote:

Originally Posted by johnnyscarecrow

if you change wheel/tire size, isn't it recommended to re-calibrate speedo?

How do you do that??

johnnyscarecrow · 09-22-2005, 04:59 AM

Quote:

Originally Posted by mopar

How do you do that??

search for a local shop...(an article that shows the differences due to tire and wheel size)....

Googgle search might work for local area, or a yellow pages, but for 2 or 3 kph at top speed...it's probably not off by that much everywhere...

http://www.web-cars.com/math/speedometer.html

20Titan05 · 09-22-2005, 12:13 PM

How can you register a 2-3kph change in speed by the speedo? That's either 1.2 or 1.9 mph.

**Titan1080** · 09-22-2005, 01:47 PM

You can use a quality GPS unit to find out changes in speed due to changes in tire size. Just compare before and after numbers.