R1 Brushless Motors (Roar approved) 17.5,21.5 & 13.5
#91
Tech Fanatic
Same timing as you but I'm on a big outdoor asphalt track and my ORCA 21.5 FDR is 3.3 (133F with no fan) and needs to be somewhere in the 3.2 to 3.1 (range probably with a fan). Ran by mistake a 3.0 FDR and it was fast but hot (170F) and still not as fast as the fastest. Was hoping the R1 would fix that but now I'm told it's out of stock too. Just my Bad luck.
#92
Tech Initiate
Does anyone else's motor whine loudly compared to other brands? I don't know that it matters but it's definitely noticeable.
#93
Same timing as you but I'm on a big outdoor asphalt track and my ORCA 21.5 FDR is 3.3 (133F with no fan) and needs to be somewhere in the 3.2 to 3.1 (range probably with a fan). Ran by mistake a 3.0 FDR and it was fast but hot (170F) and still not as fast as the fastest. Was hoping the R1 would fix that but now I'm told it's out of stock too. Just my Bad luck.
#96
Tech Addict
iTrader: (15)
the rpm of R1 motor is definitely very high. The whine is noticeable upon free revving. My r1 21.5 free revs higher than my reedy sonic 17.5. But it is not as fast due to lower torque across the board. R1 is definitely a fast motor but have to gear higher compared to most other motors.
#97
I've been running a 3.97 - 4.15 fdr with 24* timing coming off the track after 6mins with a temp of 120*. The car is quick but I feel there is more in the motor.
#98
#99
Tech Master
iTrader: (11)
Forgot to mention, carpet indoor at rsd Houston.
#100
I like this motor in 17.5 TC with 3.7 28 deg. timing, also feels better with a large spur and pinion combo, instead of small spur small pinion. 100/51 in xray seems to keep it in the powerband. 88/47 felt good but the lower rpm of the 51 pinion is fantastic.
Forgot to mention, carpet indoor at rsd Houston.
Forgot to mention, carpet indoor at rsd Houston.
Last edited by Indyonroad; 04-15-2014 at 10:59 AM. Reason: ...
#101
Tech Fanatic
I like this motor in 17.5 TC with 3.7 28 deg. timing, also feels better with a large spur and pinion combo, instead of small spur small pinion. 100/51 in xray seems to keep it in the powerband. 88/47 felt good but the lower rpm of the 51 pinion is fantastic.
Forgot to mention, carpet indoor at rsd Houston.
Forgot to mention, carpet indoor at rsd Houston.
#105
Tech Fanatic
Still not exactly the same FDR but much closer. Without wanting to start another long drawn out discussion, it's seldom that simply changing the size of the gears while keeping the FDR the SAME results in big changes in lap times. Two biggest benefits of different sized gears (but same FDR) are more efficient gear mesh and slight different CG from moving the motor forward/backward.