Hot Bodies Cyclone
04-16-2009, 12:35 PM
Hey guys, Im running at a small track. I have seen that my car isnt as fast as the other cars in my class (Super Stock 19T/13.5). Im using the following:
Intellect 5000mah 30C
LRP Sphere TC
LRP Brushless X11 13.5
My question is, can I keep going higher on pinions and lower on spurs? What is the limit? My car has 16T pulleys, and I have been trying to get 18T pulleys so it gets more top speed. Right now, Im using 98 on the spur and 38T on the pinion. I have been thinking of going 40T on the pinion or even 41. But im afraid that it will be too much for the Motor/ESC to handle. Im just trying to reach a Final Drive Ratio of 5.8 and with the 16T I find myself having to go too big on pinions... Can someone shed some light if it wont mess up my electronics by going to big on pinions? Thanks in advanced.
Intellect 5000mah 30C
LRP Sphere TC
LRP Brushless X11 13.5
My question is, can I keep going higher on pinions and lower on spurs? What is the limit? My car has 16T pulleys, and I have been trying to get 18T pulleys so it gets more top speed. Right now, Im using 98 on the spur and 38T on the pinion. I have been thinking of going 40T on the pinion or even 41. But im afraid that it will be too much for the Motor/ESC to handle. Im just trying to reach a Final Drive Ratio of 5.8 and with the 16T I find myself having to go too big on pinions... Can someone shed some light if it wont mess up my electronics by going to big on pinions? Thanks in advanced.
Right now your running a 6.29 ratio. When i ran 13.5 I geared arond 4.5, but thats on a BIG track witha LRP TC. I would say you can go down to 5.2 and be safe, unless your running a LRP SPX on the higher punch profiles.
For the 5.8 ratio your looking for you need a 98/41 or a 96/40. Just check your motor temps after a couple min's.
You can go to www.gearchart.com and create a gearchart.
04-16-2009, 01:13 PM
I agree with Scott, the motor sounds liek it is undergeared. Go with his gearing suggestion and you should be closer to the ballpark ratio you need.
FYI, you don't really NEED the 18T pulleys. It just changes the internal ratio of the car so it doesn't require super huge pinions to get brushless motors geared correctly. They also have some added benefits of not bending the belt as much, so they free up the drivetrain a tiny bit. Even then, we still have to run some pretty huge pinions to get brushless spec motors geared properly.
-Korey
FYI, you don't really NEED the 18T pulleys. It just changes the internal ratio of the car so it doesn't require super huge pinions to get brushless motors geared correctly. They also have some added benefits of not bending the belt as much, so they free up the drivetrain a tiny bit. Even then, we still have to run some pretty huge pinions to get brushless spec motors geared properly.
-Korey
04-16-2009, 01:28 PM
I agree with Scott, the motor sounds liek it is undergeared. Go with his gearing suggestion and you should be closer to the ballpark ratio you need.
FYI, you don't really NEED the 18T pulleys. It just changes the internal ratio of the car so it doesn't require super huge pinions to get brushless motors geared correctly. They also have some added benefits of not bending the belt as much, so they free up the drivetrain a tiny bit. Even then, we still have to run some pretty huge pinions to get brushless spec motors geared properly.
-Korey
FYI, you don't really NEED the 18T pulleys. It just changes the internal ratio of the car so it doesn't require super huge pinions to get brushless motors geared correctly. They also have some added benefits of not bending the belt as much, so they free up the drivetrain a tiny bit. Even then, we still have to run some pretty huge pinions to get brushless spec motors geared properly.
-Korey
04-16-2009, 01:43 PM
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04-16-2009, 01:44 PM
I'm scared of you
04-16-2009, 01:47 PM
Sure you can. I'm just saying since the internal ratio of the car itself is different, it will require a different pinion and spur combo to get the same final drive ratio.
Cyclone with 18T center pulleys has an internal ratio of 2.1667
Cyclone with 16T center pulleys has an internal ratio of 2.4375
Your final drive ratio which is what most people will use when comparing gear ratios on rubber tires (because the tire diameters are all about the same). The final drive ratio can be calculated with this formula:
(Spur/Pinion) x Internal ratio
So if the internal ratio is a smaller number (like the cyclone TC), it will take fewer teeth on the pinion to get a "taller" ratio because of the lower resulting final drive ratio.
You can almost ALWAYS achieve almost the exact same final drive ratios with either set of pulleys (execpt for the really extreme ends of the allowed ratios). It just takes a different pinion and spur combination.
-Korey
Cyclone with 18T center pulleys has an internal ratio of 2.1667
Cyclone with 16T center pulleys has an internal ratio of 2.4375
Your final drive ratio which is what most people will use when comparing gear ratios on rubber tires (because the tire diameters are all about the same). The final drive ratio can be calculated with this formula:
(Spur/Pinion) x Internal ratio
So if the internal ratio is a smaller number (like the cyclone TC), it will take fewer teeth on the pinion to get a "taller" ratio because of the lower resulting final drive ratio.
You can almost ALWAYS achieve almost the exact same final drive ratios with either set of pulleys (execpt for the really extreme ends of the allowed ratios). It just takes a different pinion and spur combination.
-Korey
04-16-2009, 02:08 PM
Guys
Those pinion and spur numbers and gearchart result for 13.5 are based on 48p or 64p ?
Thanks
Those pinion and spur numbers and gearchart result for 13.5 are based on 48p or 64p ?
Thanks
04-16-2009, 02:11 PM
04-16-2009, 02:44 PM
04-16-2009, 02:49 PM
Hi Scott B, see if you know how far the difference is between tc-spec w/ Duo and stock spec w/ Duo? Thanks
04-16-2009, 02:51 PM
Right now your running a 6.29 ratio. When i ran 13.5 I geared arond 4.5, but thats on a BIG track witha LRP TC. I would say you can go down to 5.2 and be safe, unless your running a LRP SPX on the higher punch profiles.
For the 5.8 ratio your looking for you need a 98/41 or a 96/40. Just check your motor temps after a couple min's.
You can go to www.gearchart.com and create a gearchart.
For the 5.8 ratio your looking for you need a 98/41 or a 96/40. Just check your motor temps after a couple min's.
You can go to www.gearchart.com and create a gearchart.
04-16-2009, 02:55 PM
04-16-2009, 03:10 PM
I use the 18t pulleys on my car. But you can still run the 16t pulleys and be fine, you will just have to run smaller spurs to get the same overall ratio's. I was running a 102/47 last time I think. With the 16t pulleys to get down to a 4.5 you would have to run a 88t or 90t spur. Ya a 5.8 ratio should be fine.
04-16-2009, 03:25 PM
Thanks Scotty, I has tc-spec w/ novak 13.5 now with 4.5 fdr and I'm thinking change the motor (Duo) see if they get big difference or not much?
04-17-2009, 01:45 AM
Tech Rookie
Just for info.
Currently I have WCE edition with 16T pulleys in center, for carpet races i use FDR around 4.6-4.9 and my novak GTB combo with 13.5T runs fine(don't have any coolers - using 96-97 for spur, 47-51 for pinion), for summer we have quit fast track with few chicanes and few 180 turns, but overall quite high speed track - and majority of us gear around 4.4 and all is fine as long your motor in the end isn't too hot.
Ahh, yes, our so called Stock is 13.5 with 5 cells.
Currently I have WCE edition with 16T pulleys in center, for carpet races i use FDR around 4.6-4.9 and my novak GTB combo with 13.5T runs fine(don't have any coolers - using 96-97 for spur, 47-51 for pinion), for summer we have quit fast track with few chicanes and few 180 turns, but overall quite high speed track - and majority of us gear around 4.4 and all is fine as long your motor in the end isn't too hot.
Ahh, yes, our so called Stock is 13.5 with 5 cells.