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top 21.5T motor for on road

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Old 07-09-2019, 12:24 AM
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Default top 21.5T motor for on road

Looking to get a 21.5T motor for on road. I am trying to stay away from spending $140 and higher for a motor.
I am not familiar with 21.5T motors since I mostly race in the 17.5T class in off road 2wd buggy.
I have tried in 17.5T Tekin Spec R, R1 V21, XFactor.... so far my favorites are the tekin and xfactor.

I am also curious about the SMC low rider for 21.5t.

I am running a R1 V16 21.5T right now. Running at 3.77 FDR. Car is lacking a bit of punch (100/45 gearing)

Would appreciate inputs thx.
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Old 07-09-2019, 05:30 AM
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Originally Posted by Phillip F View Post
Looking to get a 21.5T motor for on road. I am trying to stay away from spending $140 and higher for a motor.
I am not familiar with 21.5T motors since I mostly race in the 17.5T class in off road 2wd buggy.
I have tried in 17.5T Tekin Spec R, R1 V21, XFactor.... so far my favorites are the tekin and xfactor.

I am also curious about the SMC low rider for 21.5t.

I am running a R1 V16 21.5T right now. Running at 3.77 FDR. Car is lacking a bit of punch (100/45 gearing)

Would appreciate inputs thx.
The R1 V16 is still a decent motor, you'll be hard pressed to find something much better than it while staying under $140. The Surpass V4S is probably your best bet for something cheap.
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Old 07-09-2019, 05:37 AM
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I can vouch for the Surpass V4s. I run them 25.5T and 8.5T. Both are strong when timed to 5.5-6 amps. The 8.5T has scary punch!!
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Old 07-09-2019, 06:57 AM
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Id go with the V21. I just switched both my 17.5 and 13.5 buggies to them after running the monster max and reedy S+ motors in them and am loving the difference.

The V16 is a good motor but there's a new gen of motors that are just plain faster and R1 is still right there with them.

The low rider looks interesting. Ive seen a few people say its fast. Sounds like its competitive with the latest motors but I haven't driven one myself.
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Old 07-09-2019, 10:37 AM
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I love my r1 v21 21.5t motor.
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Old 07-10-2019, 01:35 AM
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Originally Posted by gigaplex View Post
The R1 V16 is still a decent motor, you'll be hard pressed to find something much better than it while staying under $140. The Surpass V4S is probably your best bet for something cheap.
does the Surpass V4s have technical support? Can you buy different rotors and sensor board for it locally just in case?
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Old 07-10-2019, 04:31 AM
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Originally Posted by Phillip F View Post
does the Surpass V4s have technical support? Can you buy different rotors and sensor board for it locally just in case?
No idea. You'd have to check with your local supplier.
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Old 07-10-2019, 01:48 PM
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I run an R1 V16 and it stays with the V21's.
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Old 07-10-2019, 08:11 PM
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Originally Posted by glennhl View Post
I run an R1 V16 and it stays with the V21's.
I currently race that motor. It is impressive considering its an old version.
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Old 07-11-2019, 02:46 PM
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any 21.5 can be fast if geared properly
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Old 07-12-2019, 10:22 AM
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Originally Posted by Marcos.J View Post
any 21.5 can be fast if geared properly
Almost any.
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Old 07-12-2019, 06:13 PM
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Originally Posted by Marcos.J View Post
any 21.5 can be fast if geared properly
sure. but which 21.5t geared properly in a specific track is faster? lol
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Old 07-12-2019, 07:53 PM
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its easier to find a motor and adjust the gearing to keep the motor in the sweet spot for each track.

a motor with lots of low end torque and efficiency could perform well on a short track or a motor with lots of mid or high rpm torque for a long track but you would need 3 motors or something that is a compromise. to pick a motor per track you would need dyno curves and the ability to calculate average speeds of each track. its not for the the faint hearted.

have fun and get a good motor you can afford. if you want the right motor and gearing for a specific track ask about a specific track probabably at the track.

or calculate the average speed per lap of the track and pick a motor that emphasizes torque in the area you want. Then calculate the FDR and roll out.
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Old 07-15-2019, 06:22 AM
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Originally Posted by Phillip F View Post
sure. but which 21.5t geared properly in a specific track is faster? lol
doesnt matter how fast the motor is if you cant stay off the pipes
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Old 07-16-2019, 05:31 PM
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Originally Posted by Marcos.J View Post
doesnt matter how fast the motor is if you cant stay off the pipes
There's always at least one "drive better" comment in a motor thread. Why don't we get that in chassis, battery, ESC, servo, body etc threads?
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