Motor + batterie setup for crt.5

[david lamontagn]

I'am to order a new motor and li-po for my crt.5.
I want to know if i'am better to take a high Kv motor like a feigao 540s (in 4500 to 5000Kv)on 7.4 volts maxamps 8000mAh or take a lower Kv like feigao 540 10L or 11L on 14.8 volts maxamps 4000mAh.
I've the UBEC.

I want a powerfull system (in the 40 m/h range) and long runtime. And i plan tu put 2.2 truck tire on the crt.5 insteed of the buggy tire.

Thank you:intello:

David

[BrianG]

Well, it's always better to use higher voltage on a higher resistance motor for less current, but weight becomes a consideration especially given the size of the CRT.5. People have run the L motors with good results. The MM motors are too weak IMO, but I don't know if anyone has tried a true S motor (the MM motors are technically the same length, but have smaller windings).

[lincpimp]

Pesonally the s can feigaos run hot, does not really matter what gearing or how light the vehicle is. I have a 12s in a pede and it runs great, but always around 170f. Never loses power or glitches and the MM stays around 135f and batts at 100f. I would suggest the 10l on 4s lipo. I have a LS10 which is bigger than the crt.5 and it loves the 4s setup (4000 maxamps 4s and MM w/UBec) I have it geared with a 14t pinion (54 spur) and it never gets above 135, even after 30mins. I have a fan on the MM and some holes in the body so the MM rarely beats 115f. Sooooo much power and sooooo smooth. Much beter than the 10l 3s combo I had in my Crt.5. Runs cooler and is just better all around. I am slowly converting all of my toys to 4s+. The higher voltage systems just work better IMO.

[david lamontagn]

OK James, that's the setup that i've think about. But for the lipo pack, is the 4000 maxamps is good and have good punch??
Is somebody have ever try the E-Cell??? $120.00 for a 14.8volts 4000 mAh, 25C pack:gasp:

[VintageMA]

Go for the MaxAmps 5000mAh 3s pack - fits perfectly on one side of the buggy. Pair that with a motor around 3000kv and you'll be all set for a ~40mph gearing with either 16/46 or 17/46.

Go for an L size can - the crt.5 is not a light buggy for it's size and you'll appreciate the punch.

Check out my setup - temps are really good and performance rocks!
http://www.rc-monster.com/forum/showthread.php?t=7478

Runtime bashing will be easily 20 - 30 minutes.

[david lamontagn]

OK i've just order a feigao 12L and a maxamps 4000mAh, 14.8 volts, and with a 18 tooth pinion.
Suppose to be around 38-39 mph with stock tires.

[lincpimp]

You will be happy with that setup, just make sure to run a UBEC, the MM will thanks you for it.