I've ran 51.9 mph with my E-maxx using 12 cells and a Hacker 7XL. The truck is very light and was using 24/51 gearing on stock diffs.
A trucks weight will make a difference. The light truck can pull a much high gear and is faster.
Those small basic motors are fine for the E-maxx if ran as a dual system. But one BIG single is the way to go.

Thank you,
Promod

Hello Promod!

I know you from maxxtraxx, i am buikpijn on that forum.

Nice to hear it worked out this well. What was your runtime and what is the kv-rating on the 7xl?

The Feigao 7xl has a Kv of 2382.

Ah, 2254rpm/volt..

I am going to try the Feigao 7XL on 16 cells. how did your truck accelerate and what esc did you used?

@Mike; I ment the Hacker 7XL..

The truck accelerated great even with the 24/51 gearing. But for bashing I ran an 18/51. The speed control was a Schulze 12.97. The trucks weight RTR (body,cells, no GPS) is less than 8 pounds.

Serum, I would use an 8 or 9XL for 16 cells. Slower turn motors for the number of cells used is the way to go.

Thank you,
Promod

I don't know the Hacker specs, but they are pretty close in specs.

Promod, so you've gotten over 50 mph on 12 cells. Congrats! That's pretty darn fast on 12 cells. What tires are you using, and how'd you get your truck so light? Tires and different chassis? My truck is at 9.0 pounds with 22.2 volts and 9.5 pounds at 29.8 volts with stock tires RTR with stock body. I wish I could really let my emaxx run, but too much salt and water on the street for traction. I can't wait till I can let it loose.

The idea behind the truck was to keep it light for 12 cells. I just took out weight every where I could. It has stock chassis(soon G-maxx),stock drive train,G3 suspension,Ti hinge pins and turn buckles,Aluminium pivot balls,no bumpers,no two speed servo,cut skid plates,cut motor plate. That is about it.
The tires used for the speed runs were TRC park tires. The stock tires are very heavy. For speed runs "street" tires will be faster. Any tread tire like stock,mashers,trail dawgs,meat hooks, etc are about 1 plus mph slower than street tires. Pin type tires like the bowtie and paqman seem better but are still slower than street tires.

Thank you,
Promod

Now there is someone who know how to do speed runs. Nice job Promod. Didn't you break 70 mph in a rustler? Or was that you?

Weight definately effcets speed runs alot. I have gone faster on less cells in my bandit(don't laugh cmon) because it is less weight. Lipos may be next muahah. I do the same thing . Change everything back to stock parts,take off bumper and wheelie bar,use small lite tires. It definately helps alot.

I am sure, it can be pushed further, as long as the cells are able to deliver more power... It's all about the maxximum power that the cells can put out.

Is this statement true?;

In one motorserie, the 5 turns and the 8 turns can deliver the same ammount of torque.. (all the specifications of the different moters i went thru, show me, that one motor of 2000kV delivers the same torque as a motor from that serie that delivers 4000kV

The 4000kV draws a higher current, that's logical..

I think it has got to do with the maxximimum amount of electric-magnetism that can be produced by the wires and handled by the magnetic energy that is stored in the rotor.

If i use this statement (which i think is right) you could also reach this high topspeeds with a 3000kV instead of a 2000kV.. It all depends on the efficiency of the motor, the motor will have opimal efficiency in a certain kV range.

All about efficiency and the maxxmimum amount of power that batteries can throw out.

Very true. Technically, all motors of the same "family" are capable of the same power. Some (high turns) make the power through voltage, while others (low turns) make the power through amperage. The power source (batteries ability to deliver needed voltage/amperage) is usually the deciding factor in actual power output.

Yeah, technically all motors of the same family can have the same power input... but the more efficient one will have slightly more output. Also, the more efficient one that doesn't produce as much heat can run at that power for a longer period of time though. Important when actually racing.

I want to post a video of my lipo emaxx, anybody know how to post it? My digital camera makes these humongous sized files - any way to compress them so I can upload them? I think you guys will be impressed by the acceleration of my emaxx - I can't even mash the throttle even in second gear because it has too much torque.

Well, when you have got windows XP, you can use movie maker..

Just import the movie there and save it, in the size and quality you like.. ;)

Send netman a pm and have him post it in the video vault on this site.