ive been racing a long time but have never run md or brushless for that matter.
where would a start to find gearing for these 2 brushless motors.

thanks

what kind of car or truck and what kind of track?

200' packed clay 240 tranny

see below!

novak gear chart (http://www.teamnovak.com/products/info_updates/ss_update.htm)

Follow the link above for what novak states for gear but if you are running a xxxt or something close to that gearbox then a good starting point for a 4 min race and the 4300 would be somewhere around 86/24 but you will want to check your temps to make sure you are about 160 or so after a full run. I would start with about 5 less teeth on the 5800 and check temps also.

Hope that helps!

well i guess its a start but those ratios are basically for offroad or road course. ill be running a b3 tranny for oval racing.

thanks for the help brian

Jeff,

Found any info yet??? I'm starting out in the 10.5 class myself and need help.

I'd like an answer something like...With an ultrabird @ 36 degrees I ran a 2.50 rollout, for the the 10.5 I ran a 2.60.

Just some kind of direct compairson would be cool.

Later, Bret

Bret,

You will get other more appropriate answers but.....for what its worth on carpet with pan cars at the 'birds we ran something like 2.40 with the ultrabird and 3.70 with the 10.5.

3.70 with the 10.5.

Typo? Did you mean 2.70?

oops.......2.70

fast guy's at the birds in 10.5 were at 3.02-3.05 rollout

Start with a 2.00-2.10 rollout with 6 cell dirt oval 10.5 motors

Our 19t sprint cars are at 1.78 rollout on pretty much the same size track,mild bank,med-high bite clay rubber CW tires

Typo? Did you mean 2.70?

LOL, I was wondering where I was going to get a 60 tooth pinion, LOL.

Thanks guy's, I have a starting point now.