JGruber

iTrader: (17)

Ok, so I am trying to figure out my final gear ratio and all those other gear ratios, so I can input them into my data logger...

Here is what I have so far.

Spur Gear - 44T
Pinion Gear - 13T
For a Primary Drive Ratio: 3.38

Front / Rear Diff Ratio: 4.30

Final Drive Ratio: 14.53

This is in a RC8e... Stock front/rear diff gears.

Does this look right?

d4man

iTrader: (5)

Looks right to me

badassrevo

iTrader: (12)

You need to get ahold of Tonys screws, he has a sweet gearing calculator that will do everything you need.

TNS Racing

how do you figure out gear ratio's???

badassrevo

iTrader: (12)

divide the big number by the little number.

JGruber

iTrader: (17)

I need to do this... is there a link?

TNS Racing

whats the big number and whats the little number? When you divide those two you get a decimal, what is that number?

JGruber

iTrader: (17)

It's like this -
Spur / pinion = primary drive ratio

front/rear diffs - Big gear / Little gear = Diff Ratio

You take the Primary Drive Ratio * Diff Ratio = Final Drive Ratio

So in my case...

44/13 = 3.38
F/R ratio = 4.30
Final Drive Ratio - 3.38 * 4.30 = 14.53