Hey Monster Mike: Maxx CD

[nitrostarter]

Do the 46 and 48T spurs fit in the RCM mount tho? I'll be using this in a different application.

[ANGRY-ALIEN]

Originally Posted by George16

I chose to mount it that way in order to use available dogbones from my parts bin. I used UE's dogbone for the thunder with the mono in the rear and UE's 70mm titanium dogbone in the front. There is still enough space to drill new mounting holes if I decide to use different size dogbones but for now, this setup will do.

Center diff is an Ofna with 44T spur and a 15T RCM pinion. I'll be replacing the diff pinion with an Ofna 10T to lower my top speed. Right now, the diffs are buggy diffs(43/13). I'll be running this on 5S :.


I'll be making a new chassis plate out of 7075T6 aluminum. It will be longer by about 2 inches compared to the stock plate. Here's the template I'll be using:

Nice work on the CD mounting plate George... very clean, very neat...

Originally Posted by Rivermaxx

Looks Like it will work good lito. The savage dogbone can be had for ~$12 shiped. Heres what I had in mind: not too sure if the g1 and g2 chassis are same demension wise though..
If I mount it this far up it might work without a chassis adapter plate. But I am not sure it will work until I get a diff with a 44 tooth gear. It might be to far foward but I have lots of room to move it back but a adapter like litos most likely will also have to be made.


The savage xl bone is ~141mm compared to the ue 132mm mono dogbone so I am not sure if its long enough to make this setup possible but it will move the assembly ~9mm foward more which isnt much. Anybody got a center diff with a 44t steel gear they want to sell? My ofna 46tooth hyper diff is just a hair to wide.

That setup is looking good also... would be possible for you to dremel a little of the material away to facilitate the 46 spur? or would you rather not? Nice to see you could get the COG that low...

[Rivermaxx]

Originally Posted by George16

The 44T spur will hit the x-braces if it sits low unless the G3 chassis is a bit wider than the G1. This is the reason why I made the mounting plate. I also tried a Kyosho 46 and Ofna 48T spurs but the 44T works the best unless I use a CNC in making the mounting plate holes.

I want to say they are exact but maybe your braces are thicker than mine?? They look like they might be. The 46 tooth would fit with a little bit of clearencing but I want to see if a 44 tooth will fit before I do that.

[nitrostarter]

Mike made this mount in order to fit his Slipperential in which uses a 46T Mod1 spur. I'm not sure I understand where the mount needs to be clearanced to fit the 46T Ofna. Pics?

[George16]

Originally Posted by ANGRY-ALIEN

Nice work on the CD mounting plate George... very clean, very neat...

Thanks. I'll be lowering by adding 3mm spacers once I have longer screws .

The 46 and 48 will fit if the mount is raised. I tried 44, 46, 48, and 52T spurs but 44T fits better than the rest on my G1 chassis.

The x-braces opening/gap on my G1 chassis is 46.2mm measured with my digital caliper.

[Rivermaxx]

Originally Posted by ANGRY-ALIEN

Nice work on the CD mounting plate George... very clean, very neat...



That setup is looking good also... would be possible for you to dremel a little of the material away to facilitate the 46 spur? or would you rather not? Nice to see you could get the COG that low...

I mess around with it a little and got it to fit with the 46tooth gear in the vertiicle milled out area in the chassis. Its real tight and has to be in there perfect or the spur will hit the brace. The dog bone also is going to have to be pretty short though but it looks like it will work.

[George16]

Originally Posted by Rivermaxx

I mess around with it a little and got it to fit with the 46tooth gear in the vertiicle milled out area in the chassis. Its real tight and has to be in there perfect or the spur will hit the brace. The dog bone also is going to have to be pretty short though but it looks like it will work.
[/IMG]

Yup, the holes need to be drilled perfectly or else either side of the 46T spur will hit the rails. This is the main reason I went with the 44T.

It's easier for me to change the current pinion to a 10T truggy pinion to lower my top speed and diff ratio instead of drilling perfectly -lined/spaced holes in order to use a 46T spur.

[ANGRY-ALIEN]

Originally Posted by Rivermaxx

I mess around with it a little and got it to fit with the 46tooth gear in the vertiicle milled out area in the chassis. Its real tight and has to be in there perfect or the spur will hit the brace. The dog bone also is going to have to be pretty short though but it looks like it will work.

Yeah... that does look a little tight..

[Rivermaxx]

I didnt realize till now that the slipperential comes with a 46 tooth spur that would be the ultimate to get one of those in my g2maxx. It will fit perfect if its mounted perfect or I can shave a little material off the inside of the brace which wont hurt the integrety at all. I need to source somebody who makes dogbones or find them allready made for other rc's.

[George16]

Beau, what's the gap between your x-braces? I'mm just curiios if it's the same compared to the G1 chassis.


Edit:
Mike needs to make some more of his mount. I need at least 1 more to convert my supermaxx to brushless.

[Rivermaxx]

Originally Posted by George16

Beau, what's the gap between your x-braces? I'mm just curiios if it's the same compared to the G1 chassis.


Edit:
Mike needs to make some more of his mount. I need at least 1 more to convert my supermaxx to brushless.

I cant find my good caliper but with my cheapy pocket chum its a hair over 46mm also, probably the same. Like I said the verticle triangle area is where I put the spur gear and it is tight probably less than 1mm clearence on either side.

[ANGRY-ALIEN]

Originally Posted by Rivermaxx

I cant find my good caliper but with my cheapy pocket chum its a hair over 46mm also, probably the same. Like I said the verticle triangle area is where I put the spur gear and it is tight probably less than 1mm clearence on either side.

I think your going to have to remove a little material for to work well... you also have to consider the movement (even if it may be slight)
the CD might have under high torque situations or even bumps.. the spur might make contact with the rails while running.

[_paralyzed_]

Originally Posted by nitrostarter

Mike made this mount in order to fit his Slipperential in which uses a 46T Mod1 spur. I'm not sure I understand where the mount needs to be clearanced to fit the 46T Ofna. Pics?

they're saying the chassis rails of a gorillamaxx need to be clearanced, not Mike's mount

[SnoopMaxx]

There are 44,5mm inside of rail on my standard 3906
and a 46t mod 1 is 48mm wide

[_paralyzed_]

In the interest of greater gear reduction I made a 52 tooth spur gear fit in my cd/motor mount. I first flipped the top plate over, the tapped holes that attach the top plate to the motor mount are not centered, they were biased to the top by about 1.5mm, and this extra clearance was needed. It sucks, because then the RC-Monster logo is hidden, but it had to be done.

I must mention now that you do this mod at your own risk, it will very likely weaken the mount. To compensate for this I used longer screws then are supplied with the mount. The holes that are dremeled by are deep enough that you can use a screw that will span past the affected area and get into the meat of the mount.

My pictures aren't that great, but they should give you a good idea what I did.

This is the top plate. I ground the top which becomes the bottom:



Here I attempt to show how close you get to the screw holes:



random hand porn:



I tried to show what I dremeled. Also, the ofna diff has a little play front to back, so the diff needs to be shimmed to the back so the spur stays as close as possible to the mount. If it wasn't shimmed it could slide forward, and even more material would need to be dremeled off.