Nitrous (NOS) in a 3F?

This site may earn a commission from merchant affiliate
links, including eBay, Amazon, Skimlinks, and others.

From my experience it helps to manually keep those RPMs up as high as your ass cheeks with let you. ie: Dont be afraid to shift down to 3rd or 2nd WAYYYY early. I bomb mine at 3500 all day up the mountain to keep speed.

You should try shifting into 3rd @~70mph which puts me at about 3400rpms and into 2nd @~45-50mph. (my ratios and speed/odometer are VERY close to stock) Depending on the grade and wind resistance this can help alot. At the least you will be a few miles closer to the pass before you hit 15-20mph:hhmm:
 
Since NO one else will....I will

I'm running 31's till there gone.... so what would be my top speed with 4:88's??????????? 35mph????? WTH!


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? :D

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
 
Last edited:
I've got a headache now THX!

Now take your factory settings and compare them to your theoretical gear, and look at the difference in RPM's


piece out
 

Users who are viewing this thread

Back
Top Bottom