SammyZ

iTrader: (138)

I know, your probably asking why but this is a budget build...anyways, does anybody have a chart or tips on where to start in terms of gearing for brushed motors? Im looking specifically for FDR targets I should be aiming for:

-19t brushed
-14t brushed
-9t brushed

The track is 100'x50' assphalt

todd8603

iTrader: (6)

All these depend on motor make and model. For a start though, with 19T Komodo Pro start at 29 rollout dropping one tooth per turn as a starting point for the mod motors. Instead of buying one pinion make sure to get a set. You won't regret it. Lots of flexibility until you go brushless then most of the sizes will be obsolete.

SammyZ

iTrader: (138)

well rollout is much different than FDR. Im trying to get an idea of a good FDR to start at, i only want to buy 1 pinion gear because im brushless in my other cars, just cannot afford a brushless ESC right now.

SammyZ

iTrader: (138)

ughhh...

PutAwayWet

iTrader: (1)

Conservative, but reasonable, and assuming 6 minute sedan races, 1500g, 80 deg. temp, and one-cut comms for two quals and a main:

19t, red springs, 767 brushes: 8 FDR
14t, same, same: 9 FDR
9t, same, same: 10 FDR

You can go to purple springs and F brushes for a little more grunt, and a little more heat, but those should ballpark it for you. As an intermediate step try a purple spring on the positive side only. I don't think you'll be pushing things too hard in those ranges. The move to 6 minute races definitely changes things. Make sure your drivetrain is freed up. Good luck.

skypilot

iTrader: (14)

PM me your address I'll send you a hand full of pinions. what car and what spur. going out of town so won't be till friday or next monday