Race Inspired MBX5T

[gtxracer]

Okay, I got tired of nitro and I probably will never go back to it now. It's just too much of a hassle and BL is so much more rewarding. Less variables and more tech gets the win for me. But, what to do about the off balance setup? That's where I come in...

I like Mike's setup, but he didn't have any of his mounts in stock right now. So I'm forced to use a Tekno lightweight motor mount. I'm not sure how I feel about this mount since it requires me to hack up my nice BCE chassis. But, if I can make it come out clean then I think it will be worth it. The main idea here is to make a balanced and fast truggy. Here's a rundown of the basic specs:

M8 2.4 for control
5955TG for steering
Tekin RX8/T8 1700kv truggy combo
Neu Energy 5ah XPI lipos, 2s + 3s in series
dual RCM battery trays
modified BCE chassis with Tekno mount
6.5 bullet and TRX connectors

I ordered a long shank 17T pinion when I thought I was still running this truck on 4s. I also have a regular 18T pinion and I believe a 11T or 13T in the pit box. I might have to get something a little lower though, I don't think 55+ mph was intended for the track. Plus I'll want more snap

Here is my Moogen stripped all the way down



Some of the goodies



Probable motor placement



ESC placement (radio tray will be cut for only steering servo)

Possible Rx placement...still not sure if the ESC will cause interference. I can mount it on the front brace too I think.



Initial Mockup







Tore apart the center diff to put in 10K fluid and take off the mech brakes. I also wanted to see if I could mount a plastic 44T Kyosho spur. Not sure if I can yet, we'll see.



Parts I'm still waiting on:
Charger (Hyperion 1210i and dual LBA10s)
RCM battery tray
Tekno motor mount
Tekno mount plates
Tekno pinion
2nd Neu battery order

[nitrostarter]

Looks great! You should have no problems mounting the motor like that. Watch your balance with the 2s and 3s packs as well.

[gtxracer]

Thanks! Yep, that is going to be the tough part. I'm going to weigh all the components and even it out as best I can. I actually think the 3s pack would be better on the servo side since the T8 is so heavy.

[lambchops]

looks great! keep the updates coming

[magman]

Nice...I tore apart my mbx-5T yesterday and in the process of changing fluids as I continue my BL conversion. Just waiting for the motor mounts to come back in stock so I can place an order w/Mike for that and a motor & batt. tray

[RC-Monster Mike]

The Mugen motor mounts are available now. :)

[BL_RV0]

Cool bro, looking forward to more progress...

[gtxracer]

Thanks guys and thanks Mike, I might alter my setup, not sure yet. This places the motor extremely close to the center diff so I may keep it this way.

Got more goodies today. My charger and other batts should be here Monday/Tuesday and that should be it. I was hoping to at least have my charger here by today or tomorrow so I could possibly run it but my time is pretty crunched this weekend anyway.



Hyperion goodies



O rings galore, picked this up for $7 a while back



Kyosho spur vs Mugen spur. As you can kinda see, the inner hole is just too big. I need to sleeve it in order for it to work. Other than that, it seems to bolt up. I just need to find some thin tube to go over my drive cup shaft. Sounds a lot like contraceptive, huh?





Center diff reassembled with 10K fluid.



Front steering plate, stock config



Same plate, flipped for motor clearance



Placement of brace in new spot. It's a little offset, but it should be fine. Still playing with this, might have to make the braces go to the center diff instead. I don't like that design, but this may not serve it's purpose in this location. More on this later.

[gtxracer]

You can kind of see the outline for the cut of the flipped spur gear location here:



Progression...







Mounted

[gtxracer]

Motor and battery placement. I'll have to trim the battery tray a little. It's a tight fit on this side, but the payoff will be balance!






And the man behind the build. My buddy Dan took this while I was working tonight

[magman]

won't the balance be off w/the motor and 1 batt. on the same side while only 1 batt. on the other? I know that the servo helps counter the weight a little, but, will it be enough?


Nice work....I am doing my mbx 5T conversion as we speak so I am anxious to see how yours handles.

[glassdoctor]

Guessing he's going to use a Caster style saddle pack layout.... two batt trays, with 3s opposite the motor...

[magman]

[QUOTE=glassdoctor;316627]Guessing he's going to use a Caster style saddle pack layout.... two batt trays, with 3s opposite the motor...[/QUOT

Even in doing so to ideally spread the weight out you would need a center diff motor mount where the motor was above the diff, not next to it....I am not criticizing his work at all..in fact his ideas are good, just stating that if his intentions are to truly balance everything for racing, the motor mounted above the center diff would be ideal.

[gtxracer]

I agree on the center motor mounted diff setup, but I didn't like how high the rotating mass would be and decided the lower CoG would be a better advantage. Yes, I'm running a 2s on the motor side and a 3s on the servo side. The servo, ESC, transponder, and Rx should be nearly the same weight as the motor. Whatever the difference is, I'll make up for small lead weights to get a good balance.

[magman]

Originally Posted by gtxracer

I agree on the center motor mounted diff setup, but I didn't like how high the rotating mass would be and decided the lower CoG would be a better advantage. Yes, I'm running a 2s on the motor side and a 3s on the servo side. The servo, ESC, transponder, and Rx should be nearly the same weight as the motor. Whatever the difference is, I'll make up for small lead weights to get a good balance.

Sounds good...I am sure when you get it all together it will be pretty well balanced.