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-   -   Would a 9l work in a revo? (https://www.rc-monster.com/forum/showthread.php?t=5465)

thndrckn 01.26.2007 01:00 PM

Would a 9l work in a revo?
 
I currently have a g2r revo project that I have been itching to finish, but funds are low and I was wondering if a the 9l I have laying around would work or not.. the esc is a Mamba maxx, and the bats will more than likely be 8000mah 2s2ps..

I'm trying to get it finished cause Im starting to lose interest and am considering selling it as it is if I don't finish it soon..

Procharged5.0 01.26.2007 01:04 PM

Yes, but it would run hot.

Buy a 7, 8, or 9xl "C-Series" depending on the batteries & ESC you are using.

BTW...

What batteries will you be using and what goals do you have for the truck???

thndrckn 01.26.2007 01:22 PM

I am looking at using maxamps 2 8000 2s2ps , basically its going to be a basher.. i don't really race just looking for something fun that isn't messy and nosiey

glassdoctor 01.26.2007 01:36 PM

Since you have the 9L and MM... go ahead and run use them. If you aren't too hard on tehm it may be ok. Just watch the temps.

Procharged5.0 01.26.2007 01:47 PM

Sorry, I forgot to respond to the ESC part of your question.

Yes the 9L will work with the MM ESC. I would agree with Glassdoctor. As always watch the temps & the gearing.

Sylvester 01.26.2007 03:26 PM

It would run, but a xl would be better, the cooler the motor runs, the cooler the esc runs!

MetalMan 01.26.2007 05:19 PM

Quote:

Originally Posted by Sylvester
It would run, but a xl would be better, the cooler the motor runs, the cooler the esc runs!

The XL motors are longer, so there's more area to dissipate heat with. Because of this, 90amps through a XL motor will keep it cooler than 90amps through a L motor. Having a XL motor run at the same temp. as a L motor will cause the ESC to heat up more because the XL is pulling more current.

JThiessen 01.27.2007 10:15 AM

I run a 10L, and its working fine so far. No heating issues at all (even running in the sand).

Bomb-Proof 01.27.2007 10:32 AM

Quote:

The XL motors are longer, so there's more area to dissipate heat with. Because of this, 90amps through a XL motor will keep it cooler than 90amps through a L motor. Having a XL motor run at the same temp. as a L motor will cause the ESC to heat up more because the XL is pulling more current.
This is true technically, but you wont see any significant heat loss front the larger can because of surface area. The XL runs cooler because it draws less current because its running much lower RPM. Its like taking a 700cubic inch motor to move something a 350ci will move...the 700ci work less for same result. You do have a larger surface area, but a larger heat generator for the same token. Its similar to compare the 9L to a 15L, the 15L has more torque and doesnt work as hard...needs more voltage(as do the XL's). More voltage= less amps....less amps= less heat.

Serum 01.27.2007 11:08 AM

Well, i partly agree with Metal; if both motors run at about the same efficiency, the L will get more hot, because it's got a smaller cooling area than the XL. I understand what you mean though, bomb.

The higher voltage systems normally run cooler, because at a higher voltage, the internal resistance becomes less of an issue.

I would not put my money on a 9L in a revo though. For 14 cells, i would pick a 7XL if you want awesome speed, power and less runtime, or an 8XL if you want decent speed, power and runtime. (if you don't push your 7XL too much though, you will get a pretty decent runtime)


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