Well I got my new esc today and I dropped the gear down to the smallest gear I could use that would still reach the spur, which was a 14t gear. I am using the RCM matrix mount for the motor. I still feel like it is cogging an awful lot. I have a pair of 3s lipos on order should I wait till they come in to see if the extra voltage helps. When I ran it in my basement the battery and esc got hot pretty fast. The motor jumped up to about 120.

Esc
 

I have this happen to me about three years ago with FD motors. When the motor gets hot real fast that means it is no good and will take out the ESC.

Yep. I'd not run the truck until you modify the mount so you can drop to a 9 or 10t gear, and/or get smaller tires.

You'll need a very big spur gear.

+1. That'll not only get your ratio closer to where it should be with your current gears but it'll allow you to fit a smaller pinion. That Genesis is a big, heavy truck and I'd personally gear it for about 40 MPH and go from there (watch those temps!)

When the bigger CC motors come out, I'd look into one of those if I were you. They should be able to handle the load of the larger truck better.

maybe a bk45-8xl motor would suit your needs. it is meant for 6s lipo and it is much bigger than the cc/neu motor. the neu motor is 40x75 while the kb is 45x77. the extra diameter and bigger rotor should help get that massive truck moving well.

edit: a fiegao 580 motor would be even batter than the kb motor. it is 45x76 and it is more efficient than the kb and it mounts like neu motor. the kb has a bigger shaft that will need to be grounded down and the screws are 30mm apart instead of the standard 25mm.

With the gearing he has now, he needs a 4 or 6 pole low Kv motor which will have the torque needed for the job.

Still way over geared. Use the calculator and don't expect that setup to work reliably until it's geared for around 40 mph, maybe even less for 4s in a truck that big. At the moment your geared for around 70mph (if you are running a center diff with no trans and the 7.5" tires). The last thing I would do is try and use that setup on 6s, you'll be geared for 100mph and will have a similar result to the first time.
Will this spur work in your truck? http://www.amainhobbies.com/product_...ducts_id/11243 If it does, you should be able to fit smaller pinions. With that spur a 10t pinion will give around 36mph and an 11t around 40mph. I'd start with the 10t and see how it goes. May even need to go down to 9t not sure...it's a big truck.

http://www.cenracing.com/cars/gst/pic/gst4.jpg

Like some of the other guys said, the best setup would be to go for a slightly bigger motor with lower kv and use 6s, while still gearing in the 40mph area. Smaller tires will help as well, but I guess it would kind off defeat the purpose of the truck.

The only problem with that is space. There is not a whole lot of room to mount a bigger spur gear there.

here is a link to the post where I have a pic of the set up

http://www.rc-monster.com/forum/show...?t=5513&page=9

What is the space between the frames?

You can always ditch the tall tires and go with what most truggies use. You can try and see how it will run with the transmision in there like aqwut and jzemaxx has in his set up. If you do stick with the set up you have, your best option is a long motor with a low Kv.

Now here is what can work with your set up:

Neu 1527/1.5Y (825Kv)
6S lipos
14T pinion
46T spur

That should give you a speed of around 42MPH without tire ballooning.

If you go with a 5.6" truggy tire, then you'll have more options to play with the pinion with the following set up:

Neu 1527/2.5D (925Kv)
6S lipos
14T (36MPH), 15T (38MPH), 16T (41MPH) and 17T (44MPH)
46T spur

I have my tryggies geared for 34-36MPH and they usually go much faster when the tires start to balloon.

i cant reist!
http://www.youtube.com/watch?v=rNQRf...eature=related
:lol:

indeed, a other one bites the dust!!
me!!

i just hope mine doesn't bite the dust

Does anybody know what gearing the hpi flux uses. I know they used a 2200kv motor with 6s lipo to reach 62mph. It looks like they use a 44t spur but what pinion do they use?