Center Differential Motor Mount Thread
 

They seem to be very popular. and if you want one- I might become your best friend... I have one that was installed on a buggy- but easily modified to fit on any other vehicle (Im actually using it on my savage). This design can fit up to a 51t spur gear without modification-aside from clearancing whatever plate it is mounted on.

I plan on mimicking this mount (after I get the approval from rc-monster mike). I will be using 1/4in 7075 aluminum stock and a cnc mill. By the final design expect to see more pockets for recessing and weight reduction. maybe even a unit to house larger spur gears... we will see.




Here is the mount that i have in my shop
http://i152.photobucket.com/albums/s...0103101820.jpg

Here are some of my original CAD design- updated one coming soon
http://i152.photobucket.com/albums/s...ountsystem.jpg
http://i152.photobucket.com/albums/s...arhead/god.jpg



Please post thoughts comments and concerns

Not bad. Let me know when you are ready to produce some - I might be able to use one for my LST conversion.

What center diff was it modeled for?

My mount will be adjustable- for a range of diffs. the current one is setup for larger diffs like the savage(shown) and the ofna diffs. the new design will accomodate the smaller losi style diffs.

I love it:intello: How much clearance does it need underneath with a 51 spur ?

I'm in the process of making a backyard(ghetto) mount for my lst2 but of course it's not as swish as that.

Very nice work man... I'm sure your designs will be well received by many of the members here... The FLM Maxx and Gorillamaxx guys are going to be watching this closely..

Keep up us updated

Alien

Will do- thank you for the compliment
probably about 2-3mm- i have a losi 50t on there now and it contacts the plate that its mounted on- needs about 1mm to rotate free

That would be great for bashers, but for serious driving COG raises too much.
This is something that i would have needed for my Hyper ST Pro conversion.

I was thinking the same thing last night. BB - depending on what software program you are using, you might be able to paramaterize the motor mount portion (positioned sketch or something) to allow individuals to specify an angle to have the motor sit at..straight up like you have it would be zero degrees, rotated to the left would be a negative angle, to the right, a positive.

If your worried about COG- get one of mikes standard mounts. this is not made to be low COG- I have raced a buggy with this mount- the car is much more balanced- kind of counteracted the higher COG..

if you want your motor on the side- get an rcm mount- I guess you could clock it... Now you have me thinking- I need to look into it now:intello:

make sure to make a recess in the top in order to get a hex into the pinion

already have that. need to mill a portion in so that the shank of the pinion will slide in- I know Im having a tough time getting pinions to fit on my 2200(shortened shaft)


As for clocking the motor- your limited to about 30degrees each way- or i would need to make a custom top plate for 45 degree mounting.



My idea now is tho have the actually motor plate clockable- 10 degree increments or so.. but making a devoted 45 degree mount is more practical and would cut down on machining time and less waste material...

I know you've seen it, but it already has the bugs all worked out. Has the slot for pinion screw access, bottom plate has raised portion to fit up to 51t spurs. Dead sexy. A little beefier. I've got mine right here in front of me if you want any dimensions. I just sold it for $300:whistle:

http://i288.photobucket.com/albums/l..._/IMG_2061.jpg

i got offers of 300 for mine.. gonna limit production to 30-40 units max so mike can still make money when he releases them- going to be limited edition :)

$300?:rofl: That is just silly...

not to the die hards...

Guess you'd have to be...:smile:

Too bad cause I could use one too.:lol:

So this setup will need mike's slipperdiff right ?

Most Diffs I would think, not just the slipperrent. diff.

Looks good on paper BB16, lets see a prototype with some hand porn before you get my 300 beans.

Just in.
 

I just received a reply from MonsterMike about this very thing. I cannot believe you sold yours Harold.

These will be in the store VERY soon, Jerry. I have been busy with maintaining current items during the holiday rush, along with trying to get some family time in, but these are on "the list". These are a little bit of a pain to make, along with being a specialty item in many ways, so I have to work them in between the "bread and butter" stuff. I think there are enough folks waiting to justify the production of them - just need to work them into production. I hate to make any more empty promises for a timeline, but I am going to TRY to finish 20 or 30 of these this week. :)

Happy New Year!

Monster

I ask because this turns your savage into a 13lbs. "Truggy" this would be cool with 8s setup.

you dont "need" a slipper... just stronger diff gears

Slipper?
 

Yea you can just install a straight up diff unit, but that gives you pretty much a direct drive setup. The slipperential would be a nice addition which would give you better setup adjustment capabilities, and some protection for your drivetrain.

Sounds good ! without it you'd have to be close on the setup or have a really good esc and packs to handle voltage spikes or binding drivetrain. This would be nice in a racer or extreme basher. don't think it would fit in my flm tranny forward chasis so if i break more than a few times i may have to look into a kershaw because of my chasis.

What setup are you running in the savage?

MMM and Rx8 should handle direct drive fine- dont think it makes a huge difference... Working on the updated cad model now

No system on the truck at the moment i'm kinda waiting around to see end weight of truck but i won't be getting a MMM it will never do i started out wrong on everything out the box but 6s won't be enough for me my truck is a SO HEAVY that it worries me and on the diffs i'm waitting on the diffs thats on the hpi europe site no need for the cenn stuff hpi just made there own better than the bullet proof stuff they have now. it still will be an all castle system :lol:

Hpi USA released the bulletproof gears more than a month ago.. whats the hold up :)


castle ice and mechanical brakes, 1717 on 8s sounds good :intello:

That has some sexy curves to it!

you need little "ears" where the horizontal part attaches to the motor mount, otherwise the screw heads sticking out the back will interfere with the motor. Looking good.

mine will be countersunk into the back of the mount- wont interfere with the motor :intello:

Looking good.
 

Anyone who works to improve our options is moving in the right direction in my book. MonsterMike has a center diff setup that seems to do the trick where our concerns lie, but it has taken forever to get something in production for us. I know that there have been people asking for this unit for two years or even longer. Statements have been made that it is coming for well over a year now, but we have only seen the three or so units that were done for private sales. If you can come up with an alternative, then great. I don't know how MM will feel about the whole thing, but up to now it is an open market for sure. I do not relish the idea of having to pay $300 for one, but supply and demand will dictate that end of things. $100 - $150 sounds more in line with respect to other center diff mounts that are sold in the RCM store. So like the old WENDY'S lady used to say "WHERES THE BEEF".

Google "Chipendales" Jerry, that is where the beef is that you so desperately desire!

Sure
 

Thanks James, but I believe that may be the beef you desire:whistle:. I like many others are waiting on the other beef, which equates to some level of production for the center diff mount that we have been discusing for over two years now:yes:. Back on the sauce I see.:lol:

Excitement
 

That was Mikak (MJBE) that offerd the $300. He got harolds for that price. You should see the trucks he builds. Price is no object. He has 4 or 5 Lightnings. You won't sell one for that, and I'm sure you know it. I'm excited about this. Is Mike really serious this time... We'll see. If so, his will go between from $100-150. Now I can't decide to make my own or go with your's or Mikes. I think its great that you are going with 7075! This is good news.

-Zack

Were milling prototypes out of some high density foam- stay posted for pics:whistle:

Monstermike
 

MonsterMike says that he will start production on his original verion in a week or so, and he is planning to make a sizable production run to handle initial demands. YEeeeeeAaaaahhhh finally. Hopefully it should be priced in the $100 to $150 range.

guess im out of luck....

Only if you were shooting for the 300 bones....
I'd still consider one of yours

Then you should still be considering. :)

if you build it, they will come.

I've seen Mike's and I'm holding out for his. But I think you should see your project through. For the experience and knowledge you will learn from going through having an idea and actually seeing it produced. There is some trial and error involved with where you are at, and they will be valuable lessons to learn.

An example would be the fasteners. I suggested "ears" and you said countersinking. Only by having Mike's in my hand I know there just isn't enough room there for countersinking and a suitable fastener. But you wouldn't know that until you try.

If you do see it through, one pic of it on the noob forum and sales on e-bay would move your product quite easily. $300 is crazy though. And keep in mind the $110 for mine INCLUDED driveshafts.

Keep up the killer work!