Which BL motor?
 

I am going to buy a BL motor and esc but I cant decide which is the fastest motor the XL2400,XL2800,Feigao 9L, or the Feigao 7x1? I am looking for a 15 to 20 min runtime. The fastest motor with the stock gearing and tires on gp's 3700. My emaxx I have already put cvds all the way around and spools in front and rear.

How many cells? The XL2800 is the fastest out of the bunch, but the Feigao 7XL is the most powerful.

the age old question is "how many cells" ( i have typed that so many times):C:

also, you might want to pull the spool out of the front if you plan on racing. you might also want to look into the xl3100.

14 sorry I forgot to include that
I looked at the xl3100 but it siad it would only take 12 cells

depending on what motor you run you will most definately have to get a lower tooth pinion like a 14 to 16 depending on the motor and number of cells.

That is fine with the pinion I just dont really want to regear the tranny untill I get the single speed tranny

the xl3100 can handle 14 cells no problem. i run mine on 12 cells and its a BEAST! 14 and it would be bad a$$.

how fast would you say it goes

What run time do you get Squee and with what cells?

The xl3100 can handle 14 cells, but it will run pretty hot. The xl2800 is a better choice for 14 cell running(or the xl2400 even). The xl3100 on 12 cells is capable of pushing the e-maxx up to near 50mph on a speed run with good cells(although I wouldn't bash/race with this tall gearing)

Hmm, I was thinking of getting the XL3100 but don't want it to run hot. Can the XL2800 on 14 cells offer the same performance as the XL3100 does on 12 cells?

The xl2800 will offer slightly better performance on 14 cells than the 3100 on 12 cells, and a longer runtime as well.

I just bought an XL2400 to run on 14 cells. Was looking for nice temps and runtime rather than insane speed. 40mph is pretty insane in my opinion.

Expect my report as soon as I did some testing.

so the XL2400 or the XL2800 are better motors then the Feigao motors correct and what is the better motor out of the XL2400 or the XL2800 and what speed controller could hanle the motors

In terms of efficiency and build quality, yes, the lehner's are better than ther feigao. However, they are almost twice the price.

It depends on how many cells you want to run as to whether the 2400xl or 2800xl is better. As for speed controls, the 2400xl can easily be run with the 7020 (I run a 2000XL on a 7020, and it doesn't even get warm after very hard running on a hot day). The 2800XL could be run on the 7020, but I would personally want (for 50$ more) the assurance of the 9920.

I am going to run between 12 to 14 cells

The 2800XL would be just at home on 12-14 cells. As for which controller, you could run the 7020 but you would be pushing it. Personally I would reccomend the 9920. Maybe someone who has run this system could give you a better answer...:)

So the XL2800 with the 9920 is the best choice out of all the motors correct and how fast would you say it would go

I don't really know exactly as I don't run this system. I would guess high 30's on 12 cells, and upto mid 40's on 14 cells. It could be geared over 50mph for speed runs, but you wouldn't want to run continuously on this gearing.

my xl3100 does mid to high 40s easy with 12 2400 sanyos with a 14/66 gearing with is pretty low. my motor and esc donr even come close to running hot. about 140*ish....lets put it this way i can put my finger on the motor fro 2-3 seconds easy. i would say get the xl 3100 and if its to fast just turn the thottle down on your radio. like i said, the xl3100 throws my 8 1/2 lbs. truck around like a ragdoll. not to mention im getting about 12 minutes runtime with OLD (4 years to be exact) 2400 cells not even charging 2400.

maxxdude1234 and squeeforever thank you so much for the help and what esc do you use squeeforever

could the XL 3100 handle 14 cells?

thats no prob.
I believe Mike said the 3100XL can handle 14cells, but it will run very hot. With 14 cells you will have absolutely stupid amounts of power (50mph shouldn't be too hard...)

Personally I would go for the 2800XL if you plan on running 14cells.

Because I got 3 sets of gp 3600 on 14 cells and 3 sets of 3300 on 14 cells and 2 sets of gp3600 on 12 cells

personally i dont think the xl3100 would run hot on 14 cells with the right gearing and possible a fan if neccesary. i use a warrior 9920. the xl3100 can handle 14 cells the only question is can your truck.

What gearing would you recommend and where could I get a fan from

i have 14/66 on 12 cells with stock size rims and tires. on 14 either a 13 or 14, not really sure. you can get a fan from your local hobby shop or even from ebay. some people bet them from computer stores but i dont think it would have a z connector or a universal.

So the 9920 could handle the XL 3100 with out a problem correct on 12 cells and 14 cells right

The 9920 should comfortably handle the 3100XL and 14cells. I don't run the 3100XL, so squee has better knowledge of the motor than me. If he's run the motor on 14cells with success then fair enough, you should be able to do so to. All I'm saying is the 2800XL will run cooler than thr 3100XL on 14cells....just my opinion...:)

correct. no problems what so ever. if your a speed freak you could also look at the xl3600. im not sure but i might run a little hot on 14 cells although it can handle it no problem from what i have been told.

You would have to be absolutely insane to run the 3600XL on 14cells. That would have absolutely horrific amounts of power. The 3600XL would definately run very hot on 14cells, and it would be getting upto its RPM limits aswell.....

I am going to run the 3100XL with the 9920 esc on 14 and 12 cells thank you all for the help

Another quesition really quick would that motor and esc have torque because from what you guys had said it has speed and power!:)

The 3100XL will have less torque than the 2800XL, but because of the higher speed of the 3100XL, it can be geared to give more torque. But believe me, with the 3100XL on 14 cells you will have absolutely no problem wotsoever with flipping the maxx on its back in second gear (ie. a gentle finger will be needed!!)

Yes, it will have got wheeliemaniac torque..

ok hanks

good choice. you wont be disappointed. trust me!

thanks

Most of the info and advice in this post is pretty accurate. the xl3100 WILL run hot on 14 cells. Also, when you increase the cell count, you must gear the motor down some(smaller pinion), not the other way around as squeeforever mentioned. The 7020 will handle the xl2800 on 12 cells, and even 14 cells, but it will be pushing it. The 9920 is the better option. For 12 and 14 cell operation, I would choose the xl2800. For 14 cells, I would probably take the xl2400. All the basic xl motors are capable of the same power output, so any of these motors could be geared to achieve similar performance. The goal is to get the motor near its ideal rpm/efficiency range based on your cell count. Most brushless motors are most efficient somewhere between 30k and 40k rpms. I usually shoot for low-mid 40k rpm range myself. The 3100 is a great 12 cell motor, and can live comfortably on 14 cells, but it will be warm.