e-maxx user looking to go brushless need opinions

I have my e-maxx which has a g1 single speed conversion, steel idlers, and ue rear cvds. Ill be runnign 14 cells which are ib3800's (2x7 cell packs). Ive looked at the hv novak stuff and thought about it but it limits me for upgrading in the future. I have also thought of the 9920/9xl setup which seems preety common and decent. I really like the mamba maxx esc cause you can program it via pc and its a few bucks cheaper. What are your guys opinoins and suggestions of what I should do. Im looking to stay right under $300 for esc and motor cause i'm preety sure ill need center cvds and have to beef up my rear diff. Thanks.

[Procharged5.0]

Welcome to the forums!

The 9920/9XL C-Series (or 8XL-C would be my preference) would be a great buy. Don't forget a UBEC as well.

I just ordered the Mamba Maxx and a Neu 1515/1Y motor plus the UBEC. But I debated the 9920 & 8XL for over a week. It's a very good combo and a great price plus you won't be limited by the ESC since you can do 14, 16, or even 18 cells with the 9920.

BTW...go for the UE 6mm CVD's when it comes time to upgrade!

***In case your wondering why I went with the Mamba Maxx vs the 9920.....I'll be upgrading to the Monster Mamba Max when it comes out and moving the MM to a 1/10 Scale truck plus moving from GP's to Li-Po's.

[GorillaMaxx360]

In My opinon go with the mamba maxx i just like it more and the computer programming and it is a mamba product that is why prefer it.

[BP-Revo]

Procharged - time to change your sig from "Brushless upgrade coming soon!" to "Brushless Powered" :D

I'd say a 7XL and MM would be a good choice (you will also need a UBEC). Ordering from Mike, all can be had for about $250

[Procharged5.0]

Originally Posted by BP-Revo

Procharged - time to change your sig from "Brushless upgrade coming soon!" to "Brushless Powered" :D

I'd say a 7XL and MM would be a good choice (you will also need a UBEC). Ordering from Mike, all can be had for about $250

@BP-Revo-Thanks for the reminder!

@Burnsomenitro-and don't forget to order a pinion gear if you need one!

What do the different numbers on the C-Series xl motors? I think its the number of turns but not sure. What does a ubec do? Also are their any limitations on the mamba maxx esc? Regard rhe limitations on the mm esc its rated for 12 cells and im 14 so it wont work.

[Procharged5.0]

The numbers refer to the number of turns. The 8XL rotates 2084 RPM per volt applied (w/no load). so for 14 cells @ 1.2v per cell (just for example) you end up with 35,011 rpm. That's in the "sweet spot" for the motor.

The UBEC (ultimate battery eliminator) is needed to supply power to the servos & receiver plus it keeps heat out of the ESC by reducing the work the ESC needs to do to supply the electronics with 5-6v.

The mamba maxx is limited to 12 cells (14 is ok too but "beyond it's specs")

The current rating is 100 amps which is fine.

Serum wrote a beginners guide to brushless. I'll see if I can find it for you. It's quite well written and explains alot!

Here is the link:

http://www.rc-monster.com/forum/showthread.php?t=5115

Ok I read over that thread but I still have a few questions. Whats the difference between the Feigao 540C XL Brushless Motors and Feigao/Nemesis/Wanderer "XL" Brushless Motors? I believe you were talking about the 540C motors. What kind of speed will I be looking at with your suggested motors? On the 9920 description it says 3Amp.BEC on/off function, what does that do?

[Procharged5.0]

The C-Series have a finned can for better cooling and a screw on end bell vs pressed. The C-Series stay together, the std. versions have been known to "spill their guts" on the track after a hard wreck or landing. That can be overcome by using the RC-Monster heat sink/motor clamp for $24.

It is best not to use the BEC on the ESC. It add more heat to the ESC. Basically the ESC has to take your 14v batteries and drop that voltage to 6 volts for the servos, receiver, etc. It does so by converting/burning off the excess voltage which heats up the esc. That is why the UBEC is hugely popular. Less heat....happier and better performing ESC!

For speeds, plug your info into Brians Calculator. It depends on batteries, truck weight, gearing, etc.

Link:
http://www.scriptasylum.com/rc_speed.html

About what gearing should I start with if I went with the 8xl if thats the better choice? Does anyone happen to know the tire diameter of the stock e-maxx tires?

[Procharged5.0]

With my soon to be released HSR Motorsports SLipper Kit, I'd select a 18T pinion and a 52T spur. (Same goes for the Strobe)

That would get you into the Low 40's (assuming good batteries and a well maintained truck)

With a RRP Slipper 66T/22T or 66T/24T would work. if you can get a 64T spur (I can't remember for sure) 62/22 should be fine.

Do you think I should upgrade the slipper clutch?

[BP-Revo]

You could get away with the RR one, but the strobe one is supposed to be really nice.

I use the RR one cause I couldn't justify ~50 bucks on a slipper...

What exactly do you need with the strobe slipper?

[Procharged5.0]

Stock maxx pressure plates, friction surfaces (steel rings), spring & nut. then you buy the Strobe Slipper and the Ofna spur.

Or you buy my HSR Slipper thru Mike @ RC-Monster as soon as they are available in a few weeks. They will outperform the strobe and offer more gearing choices.