CRT.5 power modifications?
 

Currently running the CRT.5 with RCM extended chassis with 30 series prolines. Weighing in now around ~4.5lbs. and it has become a mega power hog.

With 3S and a 1930/6 it is pulling close to 100Amps regularly and averaging 10 minutes runs, meaning an average 30Amps pull. This just sems very high to me, and the 3S 5Ah MaxAmps packs have been starting to hit ~128* and puff slightly at by the end of the run.

This is also only geared in the 35-40mph range as well. I've pulled the 1930/6 and put back in my B50 8L (3019kv), but haven't gotten a chance to run it yet to see if temps are a little better.

Reading through a lot of threads here on CRT.5 builds and HV, I am considering moving to a 5S setup and losing some weight at the same time. (Assuming my MM can handle 5S, I've got two of them and they are from the older batch, so fingers crossed)

My planned setup is going to be a 1506 3y (1850 kv, 170 grams) geared at 15/46 (~38mph)

and either a Neu 2500 25C 5S pack or one of these:

http://www.rctoys.com/rc-toys-and-pa...BATTERIES.html

http://www.rctoys.com/rc-toys-and-pa...BATTERIES.html

My preference would be the 1506 with the 2200mAh 5S TP pack. TP pack have always been nice and the chart shows holding 3.5v at 25C. This would allow me to also drop 120grams of the weight of the buggy at well.

For those of you out there who have tried the HV setups in the CRT.5 - do you think it will cool things down, will the 2200mAh pack be able to support the cars running, or am I crazy spending $500 to try this out?:oh:

My crt.5 uses a neu 1509 1y motor with Neu's hard cased 2s 5000 mah lipos. With a 15 tooth pinion and proline dirtworks tires (4.1" ) the speed calc says 33 mph. The motor gets warm never hit 100 degrees. The battery never gets warm enough that I even bother measuring the temp. the MM ESC gets around 100-110 with a 25mm fan attached. I still have the stock short chassis so I may be a few ounces lighter than you but I don't think that should make too much of a difference. At almost 3500 MAH (1930 -6) I would try the same 2s neu packs I use. The lehner motors are top quality I wouldn't worry about getting a neu as the difference in quality should be negligable.

I specifically stayed away from a HV setup with this truck since I can use the same batteries in my e-maxxes, rustler, associated t-4 etc. There is so much effort put into engineering 7.2-7.4 volt systems as that is the standard for 90% of the electric cars out there. It is easy to find good working systems in that range. That is also the reason I used a 1515 1y in my 8ight t so I could use anything form a flightpower 4s pack to 2 of my old nimh packs. I guess it makes this super expensive hobby a little cheaper.

By the way I noticed you hace a M18t pro. I just finished building one of those. How do you like it?

I love the Lehner - their motors rock, but the power on 3S with the added weight of the extended chassis seems to be making it work real hard.

If I went down to 2S I don't think i would be fast enough for me. I don' need a 50mph buggy, but I do like speeds ~40-45 for the top end, 30-35 just doesn't give me the same WOW factor. ;)

I was considering sticking with the 3S and going down to a 1506 2Y (2760kv), but the difference between that and the Hacker is so minimal it's not worth the money.

Only going to lay out the money if I go all the way for HV and it'll make a big difference.

(RE: the M18T Pro - it's only an indoor fun toy as they are just way to light to bash around outdoors - but I low kv feiago motor in it and geared for about 20 and it lasts for ever just blasting around the house. I think X-RAY is the greatest thing since swiss cheese - I keep lurking on their forums for when they are going to release a 1/10 EP 4WD buggy and I will definitely be right up there in line.)