Thinking about a speed run car

[lincpimp]

Originally Posted by Metallover

I just made an offer on a used tc3. $110 shipped. I hope I get it. It's rtr with a 11t brushed motor.

If I get it, I'll have to start thinking about electronics. I could probably borrow my mamba max from the revo. Now I just need the biggest motor that will fit that runs good on 4s.

Turnigy 36-56-2600 5mm shaft - http://www.hobbycity.com/hobbycity/s...600kv_Inrunner

KD 36-60-3000 5mm shaft - http://www.hobbycity.com/hobbycity/s...hless_Inrunner

I want to use a 3.2mm shafted motor as I have lots of pinions that size I want to use. Is it too risky to grind the shaft down to 3.2mm?

Get a medusa, and you will not want to run heavy batts in a tc, really throws off the balance and causes handling issues. 1/8 shaft is a good idea, as 48p pinion are not too easy to come by in 5mm bore. Or go to a 32p spur, then the sky is the limit with 5mm bore pinions.

[Metallover]

Originally Posted by lincpimp

Get a medusa, and you will not want to run heavy batts in a tc, really throws off the balance and causes handling issues. 1/8 shaft is a good idea, as 48p pinion are not too easy to come by in 5mm bore. Or go to a 32p spur, then the sky is the limit with 5mm bore pinions.

How do you run light batteries in a speed run car?

[lincpimp]

Originally Posted by Metallover

How do you run light batteries in a speed run car?

Low mah high C rating... If you really go for all out speed, you are only making a few passes, so runtime is of no concern. Plus you want freshly charged batts, to get the most zap.. Usually after a few passes the voltage comes down a bit, so the speed is not as good. I plan to run a kevlar wrapped rotor hacker 5s motor on 3s lipo in my speed 10th scale. Fan and ubec on the MM or course. Getting all of that tucked into a tc chassis is a tricky proposition.

My layout is similar to the tc3, servo esc and motor on one side and batt on the other. I am using a neu 5000 25c 3s, almost the same weight as the other components...