Thinking about a speed run car

[nitrostarter]

Newer model.

Making a body? Companies do sell them, why make one?

[Metallover]

Originally Posted by nitrostarter

Newer model.

Making a body? Companies do sell them, why make one?

I want to car to be a low set as possible, have cooling holes, and have a boat tail if possible.


That guy running the tc4 with the 7700 completely stock,,, will I need to upgrade the tc3 to make it hold up to the power the tc4 does?

[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?

[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?

[What's_nitro?]

Let them puff and the hydrogen will make them lighter........

[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...

[Metallover]

I have a flightpower 30c 3300mah 3s lipo, but I'm not sure that'll have the punch. Maybe I can use that and the frickin castle normally-useless 9000kv motor?

[lincpimp]

Stick with the 5700 motor and big pinions... you will be surprised how light a 10th electric tc is. I did 74 with a feigao 380c s can motor and 3s maxamps lipo...

[What's_nitro?]

Originally Posted by Metallover

I have a flightpower 30c 3300mah 3s lipo, but I'm not sure that'll have the punch. Maybe I can use that and the frickin castle normally-useless 9000kv motor?

That actually sounds like a good combo. Do you think an MM would handle the current?

[Metallover]

Would you recommend a 28mm motor, or should I go for a castle motor, or should I get a medusa motor? How will each compare? Why am I asking so many questions?

[lincpimp]

Originally Posted by Metallover

Would you recommend a 28mm motor, or should I go for a castle motor, or should I get a medusa motor? How will each compare? Why am I asking so many questions?

I guess you are an idiot, those are the only people I know who ask questions!

J/K

I would go with a newer castle motor, supposedly they have spun the rotors past 100k rpms and they stayed together. I suggested the 5700 as it will make plenty of power, and efficiency will not be too bad, so your 90amp capable lipo should survive.

[Metallover]

What does it take to put a 32p spur in? That's e-revo-maxx pitch, right?

[NoControl]

You had asked if there would need to be any body modification to a tc3/4/5 for a larget battery, I'm not too certain on a tc3 only because ae doesn't have the tc3 on the list anymore, but if its like the tc5 with a top deck, you'd have to modify the battery post mounts and the top deck.

[Metallover]

I might go with a smaller 3s lipo now with a smaller motor like a mamba motor. The battery is smaller then a stick pack. I'll see what problems arise when I get my tc3.