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spur gear cb gear ratio
- Thread starter RonDutton
- Start date
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BamaFan
ROLL TIDE!!
For a 3.3 revo I always ran a 15/40 or 15/38. Lots of torque and plenty of top end IMO. If you want a ton of top end with out the take off put a 17/38.
RevoChoplick
RCTalk Rookie
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I'm running 18/36 for my BB, and thats working fine.
2.5 gearing
I'm putting together a 2.5 for a revo roller i picked up. It wont have a CB so I will be getting a new one and wondered what some recomondations would be for the 2.5. I'm looking for more acceleration than top end.
I'm putting together a 2.5 for a revo roller i picked up. It wont have a CB so I will be getting a new one and wondered what some recomondations would be for the 2.5. I'm looking for more acceleration than top end.
BamaFan
ROLL TIDE!!
15/40 or 14/38 is about as low as you want to go.
2revo1maxx
Hardcore RCTalk User
Ron what size tires are you running?
2revo1maxx
Hardcore RCTalk User
So they're about 5.75" tall then. Ok, the "stock" ratio for that size was 15/38.
If you're looking for "takeoff" then this will be fine. It may be best to experiment with that bell gear and all three spurs, since they're much cheaper than bells.
Divide the spur teeth by the bell teeth for a ratio: 15/38 is a 2.53:1 ratio.
If you're looking for "takeoff" then this will be fine. It may be best to experiment with that bell gear and all three spurs, since they're much cheaper than bells.
Divide the spur teeth by the bell teeth for a ratio: 15/38 is a 2.53:1 ratio.
2.5, stock tires, I'm pretty sure I ran 15/40 or 14/40 (can't recall which fit). Since I run mostly in grass, I'm usually forced to sacrifice top speed for more torque or I end up running hotter than I want.
Can't recall what I run now... but I know I had to upgrade to alloy shoes (a first for me) when I got the LRP28 installed... even running 1/8 scale flywheel/bell/clutch, running composite shoes caused them to slip, a lot. So much so that after a few minutes running, it wouldn't even shift into second.
Can't recall what I run now... but I know I had to upgrade to alloy shoes (a first for me) when I got the LRP28 installed... even running 1/8 scale flywheel/bell/clutch, running composite shoes caused them to slip, a lot. So much so that after a few minutes running, it wouldn't even shift into second.
mr.johnson
RC Newbie
Hello I'm new here. I have a Revo 3.3 with the os18tm engine. What is a good spur and cb combo that i can start with. thanks
I'd run the same as stock for the 3.3 (38/14) as the power output is similar between the 18TM and 3.3.
2revo1maxx
Hardcore RCTalk User
Stock gearing is 14/38 for the 6.3" tires and 15/38 for the 5.75" talon tires. You can also use a 36tooth spur for more speed.
mr.johnson
RC Newbie
Thanks. I only street race. trying to get a good combo for top end. thanks again