7xl on 14 cells too little? (torque wise)
 

is a 7xl on 14 cells too little (in terms of torque) for an e maxx? and what controller would i need for a 7xl if it isnt too little?
Thanks!
SB

I ran mine on 14, was good fun, really enjoyed it, just when I went to 16, then 18, I never wanted to go back. :005:

I'm thinking of getting a 6XL and running 14cells. So the packs are more universal across the other cars I use.

A 7720 would run the XL and 14cells fine, I use the 9920 myself.

It is a good motor on 14 cells. I would get a 9920 unless you going to keep gearing down.

thanks nick and coolhand.
nick- do you mean 7020? as i cant find a 7720 on rc-monster and ive got a 7020 already so i'd have a cheap setup (which would be nice, im cheap lol)
h yeah what gearing would you reccomend for the maxx? as ive found a nice one, which im going to run 14 cells on the stock motors till they go pop, and upgrade along the way.
SB

If you going to run the 70 20 I would go or try a 15 66. On 14 cells it be torque but should be ok on heat on esc. Keep an eye on temps.

i wu=ill keep an eye on temps. also, i caould only get a 51t spur, as thats the ofna one that everyone uses so what gearing should i use then? should i run a 20 tooth pinion or is that too much (i dont know how to work gear ratios out lol)
Thanks!
SB

20T would be quite warm...i would start 12/51 would be close to 15/66,and work your way up. I run a 9920/10xl on 16 cells geared 18/51 and stays good...but that's in a maxx.

I ran 20/66 without strobe... stock gearing. On 14 cells no heat problems at all! :)

Yes, I did mean the 7020.

With what diffs?

right im going to try running 15/66 and see how it goes on the stock slipper then. oh yeah neweuser its going in a maxx btw.

I think your gonna run hot with that, what diffs are you running? But then again, i have never ran stock with BL LOL, let me know how it goes....I thought you had a strobe for some reason... :)

i havent even got that car yet, im buying it off someone and im going to ask what diffs he is running

he's got back to me, and he says there stock. im thinking of running maxximiser diff cups. would that be strong enough?
SB

Get some Great Assembly 7075 Diff cases. I'm using some till I get my 8-spiders and VBS. Shim the diffs properly and get those cases and you should be ok. FLM diff upgrade is good also. For 14 cells I would suggest an 8XL if you haven't bought yet. You will get longer runtimes and on 14 cells the 7XL revs to 40,017 if my memory serves me well. So it may get hot?

sounds good as i want longer runtimes and for it to go easier on the diffs.

7xl is only 2100 some loaded. That x 14.4 volts is only 30240 rpm.

i guess im going to have to go to 16 cells then?
EDIT: 14.4v is 12 cells, and on 16.8v (14 cells) with some load (2100 kv) it would work out to 35280 rpm

You could go HB's too. Squee loves his diffs.

but then i need the hybrid diff cases, and it will ost me about £140 just for the diffs :026:

You could use the combo bulks...trust me, you're gonna want them eventually anyways.

EDIT: that doesnt matter what was here before. since the maxx is coming with the stock motors, and i havent got the money for the diffs, im going to run some mip cvd's, and get the hybrid bulks and 1/8th buggy diffs at a later date, and then get the BL system and strobe slipper for christmas. i kinda forgot to tell you all im 14 and broke.

HEHE, that's ok. Age doesn't matter, you'll get there. Hybrids are the way to go IMO...Diffs though, check ebay out, you can find some compatible diffs there that would work with the Hybrids. Just make sure you ask before purchase! Then you will know foresure!

will do- im guessing mp7.5 diffs will work, and the HB lightning diffs should work good too as ive had a lightning 2 buggy for a year and not even had a whine from the diffs

Sorry super basher. I not sure where the mind was. Yeah 12 to 16 cells are good on the 7xl. I tried 18 cells but I had a heating issue. It may have been gearing or what I ran it in. I liked it though.

lol now worries coolhandcountry-it just made me think for a minute. i guess it keeps my brain working :005:

For more speed (not to hijack here) for me chc, could i run an 8 or 9xl with 16cells with good temps? 18/51 gearing?

I can't say for sure. I tried a 9xl on 20 51 with single speed and it over heated the esc. I think I had 20 cells though. If you have a 2 speed that would help.

Ive had another look around (here we go again lol) and what i thought is: the maxx wil already have GA bulkheads on it, so couldnt i just use the GA diff cases, and get the maxximiser diffs? (i want to save money, and im not going to be jumping lots, nor will i jump it high. would it still be fairly tough with that setup?
thank you all for all your help! :)
SB

I think that the Combo bulks will be around the same price as the GA setup. The combos with FLM diffs would be my choice.

its coming with the GA bulkheads, so it will only cost me $38 for the diff case.

yes i ran my 8XL on 16 cells i didnt have an 18 but 20 it over heated (when racing) 16 was good but a little under geard so 18 may be perfect

thanks!