Nova F1 Racer

iTrader: (3)

I'd go with Karl's idea for 301....

chris moore

iTrader: (96)

Well said and because brushless has so much torque you really need to gear tall.

I really like the PRS and thay have spurs down to 76.

KHoff7

iTrader: (5)

Its a combo of track size and brushless.

InspGadgt

Ok I am making the switch to 13.5 BL in this next race. I need a ball park gearing for the following 60'x60' track:

SlowerOne

Not really. The face width we use (the width of the gears) is much larger than really needed, and gives a high safety factor. Broadly speaking, the larger the pinion and the smaller the spur gear, the more teeth are in engagement, and the stronger the combination. The smaller the pinion gets, the less teeth in egnagement and the more likely it is that you could strip the spur on a bumpy track, or if you set it up wrong.

Given the choice of a small pinion and a small spur, or a large pinion and a large spur, go for the latter every time.

...of which I would highly recommend Kimbrough and RW for long life and the best gear forms. HTH

InspGadgt

Running a smaller spur gives you more room in the pod for gearing adjustment and moves the motor closer to the rear axle.

Scottrik

iTrader: (261)

More room for adjustment, no doubt. I would argue, however, that "like for like" the motor stays pretty close to the same position relative to the axle as to compensate for the smaller spur you are installing a similarly larger pinion to get the same rollout. Overall, since we're finding what had been heretofore considered ENORMOUS rollouts to be the new reality for bl racing I'd say the motor is finding its way further from the axle if anything.

Of course some engineer-type (or Michael) may come on and blow me out of the water on this one...

hanulec

iTrader: (28)

17.5T brushless 1/12th is fun. I have 3 axles with different spur gear sizes 76, 78, & 80T in order to match rollout as tire sizes change.

nemix

iTrader: (24)

ok so lots of information to digest here... luckily i have a day to practice on friday before the race.

So here is what i'm looking at - running 10.5 brushless on a large track.

Set up test 1

current 64p 88tooth spur is on the car now

pick up 38 - 42 tooth pinions to test with on the 88 spur

Set up test 2

Pick up a 78 tooth spur

pick up 49 - 52 pinions to test with on the 78 spur

I dont mind buying extra stuff to add to my pit because i dont have many gears yet at all, and i will be running cars at other tracks with other motors in the future, i.e. 17.5 stock etc.

whatcha think?

thanks for your help guys!

CarbonJoe

For what it's worth, with a 17.5 on a medium size carpet track, I am currently running 51/78 with 1.75 inch rear tires. On a large outdoor track, I'd probably buy pinions up to 55 or 56.

InspGadgt

To keep the same gear ratio or roll out when going to a smaller spur you need to go to a smaller pinion as well which will move the motor back toward the axle. If your running say a 100 spur with a 25 pinion to keep the same roll out with an 88 spur you'd have to run a 22 pinion given the same sized tires in both. But if your comparing brushed to brushless then yeah the motor might stay in relatively the same place because they run such different roll outs.

darnold

iTrader: (2)

I weighed the standard Associated front end with bearings and CRC brace but sans the ride height stand-offs Satruday and it was 1.4oz.

I will take off the CRC front end and weight accordingly (bearings and brace but sans the ride height stand-offs) and post by next Monday. My guess is that the CRC front end will be half and ounce heavier but this is just a guess.

Der Dicke

Asso and CRC Frontend have nearly the same weight. I weighted them a long time ago (when i built my GenX) and the i think the difference was just 2gr

protc3

iTrader: (13)

SE cars should be ready real soon. We are waiting on parts to come back from anodize. Everything else is complete

t4mania

iTrader: (5)

Jason, any plans on doing an SE car for the DB10R. Sounds like a cool idea for the DB12 but I already have one.