Quote:
Originally Posted by cokidva
just read this post... my head hurts
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x3.14
Quote:
Originally Posted by liljlandon
Thats factored in, the odo is off by 33%, so if i drive 20 on the odo im actually driving around 30. So i multiply my trip meter by 1.33 to get my actual mileage and divide by my gallons
usually i get 270-300ish off of 12-13gallons.
Also, once i factor in the difference of my original tire size it says my current axle ratio is 3.70
original 28
new 31
gears 4.10
new axle ratio 3.7032258064516123
Same as above using 4.88 gears
new axle ratio 4.4077419354838705
I actually come out a bit lower, which is what i want.
I dont think that the my tach is right, because according to that i should push 2800 rpm at 75 in 5th (.85) while i actually push more to the 3300 side.
4th (1:1) at 75 is 3332 while my tach says around 3800.
Can my tach be that far off?
Or have my gears been changed by the PO?
Ill check when ever my new seals get here from man-a-fre.
Thanks for all your help
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4.10 x 75 x .85 / 31 x 336 =
2,832rpm's at
75 mph 31's 4.10's
Dang!
now I remember.....I used to have the tire size (or was it rpm's??) to miles formula!...It made it real easy to see the difference they made up in ONE mile
shocking.
it had pie (3.14) in it and the # feet in a mile IIRC, but its burried in about 100 magazines
