Originally Posted by B18C Turbo
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:
The track is 100'x50' assphalt
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.