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Old 05-07-08, 08:21 PM   #3
Hilux
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Join Date: Apr 2008
Location: I don't feel tardy?
TLCA# 9h9-69
Posts: 758
put some 33's on it if you insist on the 5:29's

Personally I would not lug a truck I drive at all, for the sake of when I do go off roading.


If the 5:29 is more economical to you then its just an,...and a good one at that, excuse to get bigger tires. Then your clearance will be better off road....


still not sure if I understand you post though. See if this helps. Sit down with a pen and paper and you can SEE the RPM's the gears will be giving you at the speed you want.


Lifted v, and your OD ratio is different

Quote:
Originally Posted by Hilux View Post
mph x final drive x O.D / (divided by) Tire dia x 336


Alright, now some things you need to remember here is 1: you cant put a gear in the calculator you think you running, it'll be inaccurate or wrong. Like I said. I use, .10 per 1" so because you are running a theoretical gear (not the true 4:11) adjust this to work in the equation. And 2: It's an equation for an SAE, its not for a metric tire so heres the formula for that:

tread width/ 25 x aspect : x 2 + wheel dia.

265/70x16

265/ 25 = 10.6 (which incidentally is the tread width in ")
10.6 x 70% = 7.42
7.42 x 2 =14.84
14.84 + 16 = 31.84 (which incidentally is the tires height in ")

see?


Now, "what would be my top speed with 4:88's??????????? 35mph?????"

Is that a trick question?

I'm assuming you mean rpm at 35mph with 4:88's and 33's, If I am correct here goes.

33 x 4:88 x .71 = 114.33 / 33 = 3.46 x 336 = 1,164rpm at 35 mph


And since the OD is most likely not on:

33 x 4:88 = 161.04 / 33 = 4.88 x 336 = 1,639rpm at 35 mph


And since it wont be in either one of those gears (OD or 1:1< 3rd) and I don't have the proper gear ratio's I cannot tell you the answer to that

Well snap,....ask and yee shall,......but I aint doing it!, uh uhh


A440F
Produced January, 1990 through July, 1992 on U.S. spec FJ80s
1st gear: 2.950 to 1
2nd gear: 1.530 to 1
3rd gear: 1.00 to 1
overdrive: .717 to 1


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Last edited by Hilux; 05-07-08 at 08:54 PM.
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