64 or 48 Pitch and why
#16
#18
I'm not so sure about 64p being more efficient than 48p. I agree with Geezatec, there is more surface area in contact between your pinion and spur with 64p compared to 48p, which is why it runs quieter. The primary advantage is the ability to get finer gear ratio selectivity. This is more important when running foams where tire diameters vary so greatly compared to rubber tires. I think 64p has its greatest benefit in 12th scale racing.
#19
I'm not so sure about 64p being more efficient than 48p. I agree with Geezatec, there is more surface area in contact between your pinion and spur with 64p compared to 48p, which is why it runs quieter. The primary advantage is the ability to get finer gear ratio selectivity. This is more important when running foams where tire diameters vary so greatly compared to rubber tires. I think 64p has its greatest benefit in 12th scale racing.
But that is just a perk on the side. The higher contact area and the closer mesh allowed are the reasons behind higher efficiency of the 64 pitch.
Xrays don't allow 64 pitch unless you modify your spurs to allow access to the motor screw. Not sure about all of them but 007 is like that. You also need to modify the spur holder if you can't get spurs with six holes.
And yes, I am in the 64 camp.
#20
I'm not so sure about 64p being more efficient than 48p. I agree with Geezatec, there is more surface area in contact between your pinion and spur with 64p compared to 48p, which is why it runs quieter. The primary advantage is the ability to get finer gear ratio selectivity. This is more important when running foams where tire diameters vary so greatly compared to rubber tires. I think 64p has its greatest benefit in 12th scale racing.
Geuss we can tell the racers and the bashers between on use of 48P/64P gears.
#21
I like 64p where I can get away with it too...love a quiet car on the track.
Old Tech
Camping next to niznai...
#22
The biggest benefit of running 64p indoors is that if you need to bum a pinion or spur, everyone will have one, not too many people run 48 indoors
#23
Tech Champion
iTrader: (15)
I agree with this. Everyone runs for the most part 64 pitch in their touring cars at my track but I run 48 for the ease of the gear mesh as you have a little more room for error. I have plenty of gers and spurs so getting the gear ratio I want isn't a problem.
Overall I have always found 48 pitch to be more reliable overall with no loss in speedo and still efficent.
Overall I have always found 48 pitch to be more reliable overall with no loss in speedo and still efficent.
I run multiple classes so things can be a little hectic in the pit. 48 pitch is much easier to work with, pretty bomb proof and is cheaper on the pocket book in the long run. I use the same gears for both off road and asphalt on road racing. 64 pitch is a bit overrated for 1/10 sedan rubber tire racing. Foam tire racing I can understand.
A multi national winning motor builder tested 48 and 64 pitch and told me his dyno showed that both pitches were pretty even efficiency wise but the 64 pitch lost a lot a efficiency if you didn't set the mesh perfectly. That comment has always stuck in my mind.
#24
Tech Champion
iTrader: (1)
64p has no ratio advantage over 48p. In the real world you can change both your spur and pinion to get the excat ratio you want. I run 48p because it is more reliable. Weather it is better or not is such a minute difference that I wouldn't even bother thinking about it.
#25
Tech Adept
I think in the old brushed days, 64P was a lot more efficent because there were more teeth in contact so the force was more tangental instead of normal to the gear interface. If you look at a 10-12 T 48P, they only had one or two teeth in contact at once. So a lot of the energy went into pushing the gears apart. Now with 40+ tooth counts, almost all the force is tangental since several teeth are always in contact.
I run the 64P because I run indoors on carpet and that is what everyone runs. Nice and quiet, cost is no different and life of the gears is good. So I see no need to go to 48P. If running outdoors, I would probably go to 48P for the increase in durability.
John
I run the 64P because I run indoors on carpet and that is what everyone runs. Nice and quiet, cost is no different and life of the gears is good. So I see no need to go to 48P. If running outdoors, I would probably go to 48P for the increase in durability.
John
#26
Also, using larger diameter spurs (an 80 tooth 48 pitch spur has the same diameter as a 120 tooth spur at 64 pitch) gives your motor better leverage to turn the spur (physicists would say better radius, therefore higher torque), so there you go, another way to increase efficiency (albeit indirectly, I mean not inherent to using 64 pitch but a side effect of it).
And here's a secret. I went to the dark side when I bought my Kawada Sigma2 and discovered their 64 pitch gear which to this day I have to see betterred. My car is literally silent as a ghost. All my cars now run these (except for that dang Xray).
64p has no ratio advantage over 48p. In the real world you can change both your spur and pinion to get the excat ratio you want. I run 48p because it is more reliable. Weather it is better or not is such a minute difference that I wouldn't even bother thinking about it.
#27
Tech Adept
John
#28
That sounds credible if one accepts that some materials will distort beyond a certain force threshold therefore not impart any further force increase. Perhaps that's why spurs need to be tough so they take all of the force instead of wasting some of it in elastic deformation. (Kawada advertise their spurs as "super tough").
#30