Direct Drive to Diff E Revo Build

[DrKnow65]

Here's a link to the harley autoclutch, but I couldn't find any photo's of the internals.
http://www.efmautoclutch.com/

Basically there are two plates with tapered grooves (channels) from the center out (large groove at the center, getting smaller twards the outside). There are balls (weights) that are in the groves, when the rpm's increase the balls are pulled outward by centrifical force, this wedges the balls farther into the grooves and pushes the two plates apart, applying force to the clutch pack.

[sikeston34m]

Originally Posted by DrKnow65

Here's a link to the harley autoclutch, but I couldn't find any photo's of the internals.
http://www.efmautoclutch.com/

Basically there are two plates with tapered grooves (channels) from the center out (large groove at the center, getting smaller twards the outside). There are balls (weights) that are in the groves, when the rpm's increase the balls are pulled outward by centrifical force, this wedges the balls farther into the grooves and pushes the two plates apart, applying force to the clutch pack.

That's a pretty interesting design. I think there is much improvement to be seen in the "clutch" area of RC. I wish someone would design a clutch for RC that works like that.

Most "slipper" clutches that are used today are designed to "protect" the drive train, but they also hinder acceleration. It's really the fact that it never truly locks up that does this.

I'm almost 100% positive that I have the answer to the cogging. These diffs will change how everything acts. With the Phaltline tires and the 4.3:1 diffs, Rollout is exactly the same as the E maxx outrunner setup in 2nd gear. This is gonna be awesome because this is SOOOOOOO much tougher.

I got the Diffs assembled. They look great inside and out. I also figured out the CVD arrangement. Now I have to split the bulks to install them.

For all you guys taking notes here, the RD Logics CVD's work with the Hotbodies diff cup. The THS Racing cvd's do NOT work with the HB cup.

[Matthew_Armeni]

Maybe I'm wrong, but doesn't a Centax clutch work like that? Or is it the balls themselves that apply the direct force on the clutch? I know that it uses balls set in a concave hole so when the flywheel spins the balls are forced outward but the shape of the hole they sit in forces them forward as well. What I don't know is if they touch the bell or touch something else that in turn touches the bell. Any thoughts?

[sikeston34m]

Well I got the front end tore apart and the Bulks split. This is my first time tearing down a Revo. I'm impressed with the design. It's a tad more complex than the E maxx.

I took out the front stock diff. There's something wrong with it. It's leaking grease everywhere. When I spin the pinion, it feels like the ring gear inside is warped or something. It spins freely for about 1/3 of turn, then I feel the gear mesh and there's ALOT of drag. Hmmmmmm.........Aaah well, I'm not gonna trouble shoot it right now.

This does point toward the fact that this diff was dragging the setup down though.

The RCM diffs feel sooooooooooo smooth and spin VERY freely.

@Drknow:

Let me get this perfected. I'll show you the EXACT setup to go with and some video's.

[lincpimp]

Originally Posted by sikeston34m

Well I got the front end tore apart and the Bulks split. This is my first time tearing down a Revo. I'm impressed with the design. It's a tad more complex than the E maxx.

I took out the front stock diff. There's something wrong with it. It's leaking grease everywhere. When I spin the pinion, it feels like the ring gear inside is warped or something. It spins freely for about 1/3 of turn, then I feel the gear mesh and there's ALOT of drag. Hmmmmmm.........Aaah well, I'm not gonna trouble shoot it right now.

This does point toward the fact that this diff was dragging the setup down though.

The RCM diffs feel sooooooooooo smooth and spin VERY freely.


@Drknow:

Let me get this perfected. I'll show you the EXACT setup to go with and some video's.

Sounds like the inside bearing on the pinion let go and the ball bearings are floating around inside the diff. I had the same problem with my tekno revo rear diff. It only had 3 different nitro motors and 1 hour of hard brushless running! Maybe some better bearings, boca avid etc, would be the ticket. They may be expensive, but would sure roll nicely.