More Speed!

[squeeforever]

Originally Posted by sjcrss

Here are the diff ratio's for you...
Diff ratio’s
Stock- 2.85:1
UE 1/8th - 3.31:1

and squee I've been running my 1920/8 ot the rpm range of 56433.6 RPM for over 4 years and I've never had a issue with it overheating or anything....for me to run it at 40,000 rpm I would only be able to run 8 cells and that's it...

That may be...But the Feigao's and Wanderers aren't as high quality and aren't rated for so many rpm's. The bearings will fail easily. And yes, jhautz is right. 45K would be good for something like a Lehner, but I would perfer to keep it around 40k. It would run cooler, draw less amps, ect.

[BrianG]

Originally Posted by coolhandcountry

The ue has 43 on the spur with 13 on the pinion.
The hb pro gears are 43 on spur 10 on pinion.

Thanks CHC. I've added those diff ratios to my speed calculator and uploaded it.

I just realized that if you use the HB Pro diff along with a typical spur/pinion, you almost don't need a tranny, especially if you set the spur/pinion up right...

[squeeforever]

Brian, are you talking about if you choose to run a center diff?

[BrianG]

Squee: No, just the HB diff.

Example:

A stock Emaxx: diff = ~2.85:1, tranny (2nd gear) = 1.72:1, spur/pinion (66/18) = 3.67:1. That's a total ratio of ~18:1.

If you use the HP Pro diff (4.3:1), you only need a pinion of 16T to achieve about the same final ratio of 18:1. Or, if using a 51T spur, use a 12T pinion.

[coolhandcountry]

Squee is saying that is what they are made for. They are designed for a truggy. It gears it down low enough for a center diff or slipper in a truck. Which eleminates the tranny. :D

[neweuser]

How would one use a center diff in an emaxx? And what center diff would one use?

[coolhandcountry]

I used a ofna from a buggy. It just takes some modding. some fabrication. But nothing to serious.

[neweuser]

Hey chc, do you have a link for that center diff?

[BrianG]

Originally Posted by coolhandcountry

Swuee is saying that is what they are made for. They are designed for a truggy. It gears it down low enough for a center diff or slipper in a truck. Which eleminates the tranny. :D

Oh, I thought he was questioning how to get the same ratio without a tranny. :dft001:

[neweuser]

Does anyone know about a center diff and if it's possible with an emaxx?

[squeeforever]

Yea, it's possible. Only stipulation is that you need a Gorilla chassis or something of the sort, and you already have that covered.

[coolhandcountry]

http://www.rc-monster.com/forum/atta...0&d=1133402756

http://www.rc-monster.com/forum/atta...5&d=1133567634

Here is a couple pics of my old setup with a center diff. Promod has one and check out maxx bling as well.

[neweuser]

Where would you get the diff and how do you know which to use? thanks guys?

[coolhandcountry]

I got mine from ebay. The mbx ofna buggy diff. It is a good idea to get one that takes the plasic spur gear.

[neweuser]

Ok, thanks. So what would be good gearing for using a center diff if i'm using UE diffs?