Big or Small Spur Gear???
12-09-2007, 05:02 PM
#16
It really shouldn't matter, as long as the ratio is the same, since you are spinning up the entire system, not just the spur. You'd have to weigh the spur/pinion combination to see if there was a weight difference, but I'd bet that the difference is minimal, at best. Just tap one less board and any differences will probably be negated. 
12-09-2007, 11:58 PM
#17
I'm currently running the SMALLEST Spur Gear I can find.
I run the PRS 64 Pitch 76 tooth SPUR GEAR. This is to get a tall enough ROLLOUT for the class I run on a Bicycle VELODROME
That TINY spur was coupled with a 63 tooth PINION yesterday to run laps over 52 mph in our SLOWEST Brushless class. (Rollout 6.5 - RATIO 1.206:1)
When running HIGH RPM motorsk, we use Larger Spurs to get the ratio, when running LOW RPM motors, we use Smaller Spurs.
When I ran a 7x1 MOD motor last year with our 4 cell oval cars on a short track, I ran a 128/18 on short foam tires. (Rollout .97 - RATIO 7.111:1)
I run the PRS 64 Pitch 76 tooth SPUR GEAR. This is to get a tall enough ROLLOUT for the class I run on a Bicycle VELODROME
That TINY spur was coupled with a 63 tooth PINION yesterday to run laps over 52 mph in our SLOWEST Brushless class. (Rollout 6.5 - RATIO 1.206:1)
When running HIGH RPM motorsk, we use Larger Spurs to get the ratio, when running LOW RPM motors, we use Smaller Spurs.
When I ran a 7x1 MOD motor last year with our 4 cell oval cars on a short track, I ran a 128/18 on short foam tires. (Rollout .97 - RATIO 7.111:1)
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