Beginner drag car build
#1

Anyone try a team associated dr10 with losi 22s drag car esc and motor and battery combo? What gearing should I run with that setup?
Last edited by Yojih123; 11-25-2022 at 07:41 AM.
#2

I know with the Dr10 with stock electronics, its geared for 3s. I went with a smaller spur and a bigger pinion.
#3

Last edited by Yojih123; 11-27-2022 at 11:08 AM.
#4

For a beginner, you'd be better off just getting the losi and learning. Im not sure if the box stock classes would allow part swapping (even to other stock parts). Swapping out slow electronics for slightly less slow electronics wont get you anywhere.
#5

Last edited by sps3172; 11-28-2022 at 01:10 PM.
#6

Sadly, the 'national' rules proposed by NPRC and mirrored by many local clubs allow the parts swapping game. They refer to the class as 'box stock' but allow you to swap electronics, tires. bodies....provided you choose from one of the 3 RTR options. Once guys learn the ins and outs of the 3 RTR cars, this class will become the AE chassis/Losi Electronics/Traxxas tire class. It seems like most of the people 'running' the RC no prep scene (on local and national levels) have little to no experience with RC racing....they come from a full scale drag race background. Those of us that have been around RC racing for a while recognize all the mistakes they make with the rules and racing and we also know how the story ultimately ends.
The manufacturers that are involved (and actually DO have experience with RC racing) seem willing to participate in the mismanagement of this segment provided it allows them to make more sales in the short term.
The manufacturers that are involved (and actually DO have experience with RC racing) seem willing to participate in the mismanagement of this segment provided it allows them to make more sales in the short term.
What gearing should I try first?
Last edited by Yojih123; 11-28-2022 at 07:49 PM.
#7

Well, first of all, 3s on the Losi 6500kv is generally a no-no. If that's what people are doing, I guess... but 6500kv @ 12.6v is ~82k rpm... I'm really not sure that motor is rated for above 75k rpm. I run my vendetta on 4s with the stock motor (3900kv @ 16.8v = 65.5k rpm) but it stays under 75k rpm. Honestly, 2s on the Losi motor is plenty. We have a guy locally who runs a drag slash on 2s and has been spanking a bunch of 3s drag slashes.
For drag racing you need two basic things:
Basically, what I'm trying to say is... you'll have more luck with 2s (more headroom for rpm, gearing effects power more directly) than 3s (very touchy, wheelie-happy, and inconsistent).
...and wtf is with the traxxas rubber? I'll admit, it may be the softest/stickiest out of the stock choices, but wide tires aren't ideal at this scale. Get over 45mph and they start to do funny things. Plus, traxxas tires are notorious for failing quick. Truth be told, those 3s drag slash guys are actually running stock slash tires (the bf Goodrich tread) with considerable luck.
For drag racing you need two basic things:
- High KV: for top-end power
- Steep gearing: to get to top-end fast
Basically, what I'm trying to say is... you'll have more luck with 2s (more headroom for rpm, gearing effects power more directly) than 3s (very touchy, wheelie-happy, and inconsistent).
...and wtf is with the traxxas rubber? I'll admit, it may be the softest/stickiest out of the stock choices, but wide tires aren't ideal at this scale. Get over 45mph and they start to do funny things. Plus, traxxas tires are notorious for failing quick. Truth be told, those 3s drag slash guys are actually running stock slash tires (the bf Goodrich tread) with considerable luck.
#8

Well, first of all, 3s on the Losi 6500kv is generally a no-no. If that's what people are doing, I guess... but 6500kv @ 12.6v is ~82k rpm... I'm really not sure that motor is rated for above 75k rpm. I run my vendetta on 4s with the stock motor (3900kv @ 16.8v = 65.5k rpm) but it stays under 75k rpm. Honestly, 2s on the Losi motor is plenty. We have a guy locally who runs a drag slash on 2s and has been spanking a bunch of 3s drag slashes.
For drag racing you need two basic things:
Basically, what I'm trying to say is... you'll have more luck with 2s (more headroom for rpm, gearing effects power more directly) than 3s (very touchy, wheelie-happy, and inconsistent).
...and wtf is with the traxxas rubber? I'll admit, it may be the softest/stickiest out of the stock choices, but wide tires aren't ideal at this scale. Get over 45mph and they start to do funny things. Plus, traxxas tires are notorious for failing quick. Truth be told, those 3s drag slash guys are actually running stock slash tires (the bf Goodrich tread) with considerable luck.
For drag racing you need two basic things:
- High KV: for top-end power
- Steep gearing: to get to top-end fast
Basically, what I'm trying to say is... you'll have more luck with 2s (more headroom for rpm, gearing effects power more directly) than 3s (very touchy, wheelie-happy, and inconsistent).
...and wtf is with the traxxas rubber? I'll admit, it may be the softest/stickiest out of the stock choices, but wide tires aren't ideal at this scale. Get over 45mph and they start to do funny things. Plus, traxxas tires are notorious for failing quick. Truth be told, those 3s drag slash guys are actually running stock slash tires (the bf Goodrich tread) with considerable luck.
#9

Well, first of all, 3s on the Losi 6500kv is generally a no-no. If that's what people are doing, I guess... but 6500kv @ 12.6v is ~82k rpm... I'm really not sure that motor is rated for above 75k rpm. I run my vendetta on 4s with the stock motor (3900kv @ 16.8v = 65.5k rpm) but it stays under 75k rpm. Honestly, 2s on the Losi motor is plenty. We have a guy locally who runs a drag slash on 2s and has been spanking a bunch of 3s drag slashes.
For drag racing you need two basic things:
Basically, what I'm trying to say is... you'll have more luck with 2s (more headroom for rpm, gearing effects power more directly) than 3s (very touchy, wheelie-happy, and inconsistent).
...and wtf is with the traxxas rubber? I'll admit, it may be the softest/stickiest out of the stock choices, but wide tires aren't ideal at this scale. Get over 45mph and they start to do funny things. Plus, traxxas tires are notorious for failing quick. Truth be told, those 3s drag slash guys are actually running stock slash tires (the bf Goodrich tread) with considerable luck.
For drag racing you need two basic things:
- High KV: for top-end power
- Steep gearing: to get to top-end fast
Basically, what I'm trying to say is... you'll have more luck with 2s (more headroom for rpm, gearing effects power more directly) than 3s (very touchy, wheelie-happy, and inconsistent).
...and wtf is with the traxxas rubber? I'll admit, it may be the softest/stickiest out of the stock choices, but wide tires aren't ideal at this scale. Get over 45mph and they start to do funny things. Plus, traxxas tires are notorious for failing quick. Truth be told, those 3s drag slash guys are actually running stock slash tires (the bf Goodrich tread) with considerable luck.