Single Speed Gearing
 

I have a single speed on a stock chassis and want to run the 9920 with a 8xl on 5s. I tinkerd with the "motor selector" and "Random Parameter Solver" and found that an 8xl with 5s and 18/54 gearing is "good" for a for a top speed of +/- 40mph, 20/54 for 45mph and 22/54 for 50mph without any overheating warnings.
Does this sound about right to you guys?

what pitch? 32?

It sounds like you got some short tires. It sounds right though depending on tire
height.

It sounds about right but maby + or - depending on the weight and tire size

Yeah I figured 32p but the calculators did not have an option to select what pitch.

Yeah right now I have maxx mashers (not 40's).

Here are the variables I entered:
Enter approximate vehicle weight: 12 lbs (is this abought right)
Enter the differential gear ratio: 2.846... Revo
Enter the transmission gear ratio: 1.722... E-Maxx 2nd gear
Enter the battery voltage you plan to use: 18.5 5cells 3.7/cell
Enter tire diameter in inches:5.5

where can you get a 54th 32 pitch spur? I thought they were mod 1 when they went that low..lmk
phil

Jato

Actually, I have some of these spurs I believe...Not sure, but I think there for the Nitro Hawk...

Is 12lbs a good estimate for thw weight of a BL Revo with a stock chassis?

12lbs is definitely a safe figure. Mine weighs less than 11lbs with 14 GP cells. My first version (using the emaxx tranny) weighed something like 13 lbs IIRC.

I was close...

When I said "Jato", I was assuming a gear that was compatible with the Revo slipper (with no mods)...

Cool! I think im all set to make my final purchases to complete my project. Oh, Im so excited! :D
Yeah, Nitro Hawk gears are the next smallest of the 32p spurs that traxxas makes that use pegs/diffballs.

Does the revo slipper fit the shaft on a e-maxx tranny?

No, it doesn't, but a adapter of sorts is on its way...