Dougoilman661

iTrader: (13)

I was Lookin to make my CRT.5 stupid fast and made a stupid choice. I bought a castle 6900 system thinking this would do it. Well it didn't. Now I'm wondering what would be better to make it 65 mph+ fast.

Thinking of getting the MMM 2650 designed for 1/8 buggies. Would this combo be what I'm looking for or what wil I need?

T. Herwig

iTrader: (25)

You would be better off with a 2200kv rather than the 2650kv.
I recommend no more than 4S for racing with this motor, but if you want to go stupid fast there ya go.

Dougoilman661

iTrader: (13)

I'm going to have a setup for racing and bashing. I want the MMM for bashing and the Sc for racing. Out of the 2400 and 3800 Sc system is the 2400 faster?

SLO county race

iTrader: (10)

lowe4r the kv level is less speed but more torque and vice versa

Dougoilman661

iTrader: (13)

So then the ideal setup would be a mmp with a 3800. The mmp would enable me to run cooler

SLO county race

iTrader: (10)

ya i guess. thanks kinda like a traxxas velinion motor if not a tad faster. i think that motor is a 3500kv?

silentbob343

iTrader: (1)

Much better motor than the velineon; 4 pole neu, compared to a 2 pole s-sized feigao.

MMP +3800 on 3s will get you get you 53mph on 4" tires with a 16t pinion.

racer1812

iTrader: (31)

pick a thread...

http://www.rctech.net/forum/radio-el...less-math.html

silentbob343

iTrader: (1)

Good points in the other thread, speed calcs aren't hard and fast, but can be used as a starting point.

84 GT 5.0

iTrader: (26)

first pick voltage doug. 2s 3s 4s? for 3s and 4s speed runs go mmm/2650 it will be stupid fast and will handle 6s if monitored closely. also on 3/4 s it will stay ice cold

ScottKelly911

iTrader: (9)

I have a Slash 4x4 with a MMM 2650 on 4s and it's ridiculously fast. My friend had the same but had the 2200 and I walked him like he was stuck in mud. For shits and giggles I threw a 6s in there and it was STUPID FAST! I believe that's what you're looking for lol Oh I also had it geared 25T pinion and a 50T spur, yeah you can imagine how ridiculous it was. Many people will tell you not to run a 6s on the 2650. It can handle it however not for sustained periods. If you call, even Castle will tell you it can handle it for short bursts like speed runs. But doing them over and over and running a whole battery pack through like that might kill it. But for short High Speed runs, it can handle it no problem, but your tires wont!

Dougoilman661

iTrader: (13)

I also have a spare Novak 4.5 550. What type of speed would that give me on 2s?

84 GT 5.0

iTrader: (26)

that 4.5 would be faster than what you have and run cooler, you just need a controller for it.

silentbob343

iTrader: (1)

Teach a man to fish:
http://scriptasylum.com/rc_speed/top_speed.html

bigben1165

iTrader: (9)

rc caR ACTION did a project car that went 100mph. i can send you the pdf of the article if you send me your email address.