transmisson ratios and figuring rpm at certian speed
#1
transmisson ratios and figuring rpm at certian speed
i got this from another post from bob
with that information how can i figure my rpm at 60mph. there has to be a formula to figure what it should or close to it.
with 33s and 4.10s its like 2100 rpms right now
so what should it be with 35s and 4.88s ?
Originally Posted by rwenzing
1st 2.47
2nd 1.85
3rd 1.47
4th 1.00
5th 0.75 (OD)
Rev 2.10
2nd 1.85
3rd 1.47
4th 1.00
5th 0.75 (OD)
Rev 2.10
with 33s and 4.10s its like 2100 rpms right now
so what should it be with 35s and 4.88s ?
#2
#4
You could easily do it with multiplication but this calculator makes it even easier:
Go to -> http://www.bgsoflex.com/auto.html
Select "RPM amd MPH Correlation" from the LH panel.
Go to -> http://www.bgsoflex.com/auto.html
Select "RPM amd MPH Correlation" from the LH panel.
#6
Don't forget that most '33' and '35' tires are 0.3~0.5" smaller than their sidewall numbers would suggest, even when brand new. Using a number that is 1/2 inch smaller in the calculations is a good rule of thumb for improved accuracy. For example, use 32.5" for the diameter of a '33' and 34.5" for a '35'.
#7
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Bazman2008Ranger
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08-24-2014 07:46 PM