6 gear final drive ratio, pinion, motors

[graemevw]

I've decided to get my old A stamp gold pan running again. I rebuilt it a few years ago and ran it on astro once but I remember struggling a little with gearing.
I think I had a 9t pinion (32dp gears), whatever the stock spur was, and a 16x2. I did have a 19x2 bit it was slow and overheated.
I'm hoping to be a bit more successful at getting the gearing right this time, and I think I'll use a tamer motor. I remember it being a pain trying to gear low turn motors properly.

Thought I'd ask you folks and see if I can find out the final drive ratio on these cars, what motors are recommended, and pinion sizes.

Last time I was just trying to make it as quick as my super astute which has a 14x2, or my 10.5t egress, or my 16x2 procat.
This time I don't want to be crashing the rc10, and don't want to blow it up. So am thinking going milder (19t-23t ish?) In the hope the car will still be fun, won't suffer as much damage, and will be easier to gear correctly.
Will also mean I'm not tempted to try and chase down every last bit of handling I can from the car.

So, what set up for a brisk, but safe/enjoyable car on small tight tracks?

Oh, and I deffinately want to stay brushed in this!

Thanks.

[ChocoTaco73]

Check on page 20:
https://img2.associatedelectrics.com/pdf/cars_and_trucks/RC10_Classic/RC10_Classic_Kit/manual_RC10Classic_2013.pdf

[juicedcoupe]

I'd suggest switching to 48 pitch gears. It will seriously open up your gearing options.

[graemevw]

Check on page 20:
https://img2.associatedelectrics.com/pdf/cars_and_trucks/RC10_Classic/RC10_Classic_Kit/manual_RC10Classic_2013.pdf

That's the rere and 48dp gears. The final drive ratios there though are no good for modified brushed motors.

[graemevw]

I'd suggest switching to 48 pitch gears. It will seriously open up your gearing options.

I've considered it. I'd rather keep it 32, but if I can't, I'll change it.

[juicedcoupe]

Here are some final ratio recommendations from back in the day. Keep in mind that those were based on racing conditions with older SCRC batteries.

[graemevw]

Thanks, I can probably work this out from here.
Anyone know the internal reduction ratio of the 6 gear trans?

[juicedcoupe]

1.83:1

[juicedcoupe]

Also keep tire height in mind.

If you are running modern 2.2 tires, the effective gear ratio will be different.

Even though this is made for real cars, the calculations still work. Just put the different tire diameters and gear ratio in, and calculate the new effective ratio.

http://www.wallaceracing.com/gearcalc1.php

[graemevw]

Great, thanks.
I'll write out a chart. Been looking into 48dp conversion too, I'll have to measure and see what kind of size spur I could fit.
If I want to keep it brushed, and if I want to push it with low turn motors and 2.2 tyres, I'd be looking at maybe a 96t spur or similar.

[graemevw]

Actually, probably wouldn't need to go that big on the spur. Fdr's are lower in 2wd cars aren't they, I'm still thinking 4wd.

[BattleTrak]

This would be good info to add to https://www.setupsplus.com/

[juicedcoupe]

Unless you don't plan on using a gear cover, I'd recommend a smaller spur.

With 48 dp, an 81-82 is all that will clear an RPM cover. 87-88 will clear the stock cover. That is with the 6 gear. The Stealth has a slightly different gear placement that allows for a little larger gear.

I have also modified a T2 cover and used a 91 on a 6 gear, but it was extremely close.

[Lowgear]

This would be good info to add to https://www.setupsplus.com/

I was going to post the link, but the accompanying text about its lack of use thus far was going to be kind of bitter so I refrained.