RS4 Gearing

[mnm]

I would like to know what Gearing do you people who have rs4's use? I have been testing some gear ratios out and haven’t come to a satisfaction at all, so I am currently using the stock gearing setup for the rs4 3 evo which is
Pinion: 18:22tooth
Spur gear: 52:43 tooth

I'm curruntly using the 18ss Engine.

I basically want fast take off's with decent speed. Something that will be fast at take off but at the same time won’t sacrifice the top speed much; application would be for track racing with a lot of corners, yet decent amount of straight ways.

Any help would be appreciated.

 

[kwong2001]

For my rs4 2, i'm running 37/20 spur/pinion gears. It's calculated to top out at around 75mph at 30k rpm. But i'm sure this doesn't mean much since i've got a 24.7 engine.

 

[AC48]

I have yet to drive my RS4 3 18SS, but you may want to try taller than stock gearing with that engine. HPI put in the red gears for the pinion, and 43/47 for spurs. Thats what HPI likes for the 18SS engine I guess.

 

[mnm]

Anyone else have any input or help on gearing?
I came up with this Gear ratio.

Spur: 1st gear 45
Spur: 2nd gear 41

Pinion 1st gear 17
Pinion 2nd gear 21



Or

Spur: 1st gear 47
Spur: 2nd gear 43

Pinion 1st gear 18
Pinion 2nd gear 23

I'm leaning more on the first gear ratio.




thanks

 

[mnm]

anyone?

 

[kwong2001]

Assuming the motor reaches 30k rpm:

First gearing choice:
First gear = 28.8mph
Second gear = 39.1mph

Second Gearing choice:
First gear = 29.2mph
Second gear = 40.8mph

IMO, if those are your choices, you're not gonna notice much difference if any at all, so either one would be fine.

 

[mnm]

it says the motor can reach up to 40K?

thanks anyways.

 

[kwong2001]

It won't reach 40k, don't go by peak rpm, it's crap. And all your power by then would be long since peaked. At best, calculate it at maybe 35k max rpm