Ansmann Macnum mid conversion

[madmax]

hi people, i bought a macnum just as a bit of fun, and to try some mods,
after running the truck a couple of times i have found the truck to be able to wheely far to easily, and the only truck to beat me on that day was a X60 due to the fact it had a better drive out the corners.

so i went and bought another macnum as they are nice and cheap and hear is what ive done so far

http://i42.photobucket.com/albums/e349/leelexus/IMG_0066.jpg

first of all i have made a carbon t plate. as the std one is very weak

http://i42.photobucket.com/albums/e349/leelexus/IMG_0068.jpg

i then started to trim the chassis to take the gearbox the other way round.

http://i42.photobucket.com/albums/e349/leelexus/IMG_0069.jpg

i then started to trim the other side away and found that i have to remove alot of plastic, so that only 2 of the screws holding the t plate can be used.

http://i42.photobucket.com/albums/e349/leelexus/IMG_0067.jpg

as you can see hear. due to this little problem i am going to make a wrap around brace to go arround the motor and bot to the chassis. to put strenth back into it their.

http://i42.photobucket.com/albums/e349/leelexus/IMG_0070.jpg

so you get an idea i am thinking of making a brace over the motor and going down the the chassis eather side of the battery slot.

i have a few more bits to fabricate and looking at making a rear hinge pin hanger / shock tower mount to the back of the gearbox.

[SuperSparkSteve]

Looking good so far. keep the pics coming as i would be interested in copying ur design lol
Does the Macnum share alot of the same parts as the Madrat, same as the T4 and B4?

[Tom3012]

If you raise the gearbox slightly you can use all 4 t-plate screws;)

[madmax]

i did look at that option tom, but you would have th lift it up by 5mm.
and i wanted to keep the c of g as low as posible.

the backend is the same as the madrat.

[madmax]

ive done a bit more work this morning and this is the current progress.

http://i42.photobucket.com/albums/e349/leelexus/IMG_0072.jpg

as you can see in the pic ive made a small brace that wraps arround the back of the motor.

http://i42.photobucket.com/albums/e349/leelexus/IMG_0071.jpg

http://i42.photobucket.com/albums/e349/leelexus/IMG_0073.jpg

as you can see in this pic you can see a kyosho hing pin hanger to mount the rear wish bones i will be using a alloy one eventually, i am also usint one of these as they are alot stronger that the std macnum one.

http://i42.photobucket.com/albums/e349/leelexus/IMG_0074.jpg

here you can see the rear shock tower mount and fitted, i will be making a brace that goes between them and this should give the strenth for the shock tower.

[Big G]

I did the same with my T3 truck. I also swapped the side of the transmission that the spur was mounted so my motors ran the same way as before, but at the moment my motor is rotating in the opposite direction to the wheels which isn't good right now.

Need to get a 4 gear transmission in there to solve that one.

[madwestmo]

looking good so far , might give this a go on my spare mad rat :)

[Chequered Flag Racing]

Need to get a 4 gear transmission in there to solve that one.

will this idea help?

http://www.oople.com/rc/photos/euros2009/day3/otto/OOP_9121.jpg

picture by o0ple from 2009 Euro's

[stampede vxlboy]

nice work . i would love to do that to my buggy. but it looks like you made some carbon bits and a brace for the chassis at the rear of the car.could you make a carbon t plate for me i will pay you what it cost and the time as well plz will you get back to me about it . nice work mate keep the pictures coming :thumbsup::thumbsup:

[Tom3012]

will this idea help?

http://www.oople.com/rc/photos/euros2009/day3/otto/OOP_9121.jpg

picture by o0ple from 2009 Euro's


I know thats mounted to the upper motor screw hole... but do the bearings just sit on the screw??

[Big G]

OMG where do I get the 48DP cog!?! :lol:

hrmmm. thinking about it if I used the same size pinion as before I wouldn't change the drive ratio...

[rc_penguin]

Its a standard idler gear from a xxx-cr gearbox, ive done the same thing to my cr2 and its as simple as it looks!

[_sleigh_]

The gear used is a standard B4/XXX internal idler gear, which are both 48dp.

You could also use CAT SX gears as these are 48dp too and would allow for various different sizes to suit your requirements.

I'm pretty sure the B4 & XXX idlers are a slightly different number of teeth, so you could use these to give different ratio's. You have to bare in mind that the distance between the motor securing screw and the motor output shaft is a fixed distance, so pinions/ratios are limited.

[Big G]

ooo I have a spare B4 idler in my box after me and Wezzer installed the SC10 diffs the wrong way and murdered the originals...

[Tom3012]

how do you actually install it though? im guessing the bearings dont just sit on the screw??

[Dunc]

The idler bearing is 1/8 x 3/8".

1/8" = 3.175mm; motors use an M3 thread so I assume the bearing does just sit on the screw.

Disclaimer: this is just a guess on my part!

how do you actually install it though? im guessing the bearings dont just sit on the screw??

[Big G]

can't seem to get it working in my T3. 87 spur seems too big to get both meshing right. will try a 84 tomorrow.

screw through the bearing. a couple of those mega thin washers you use on the drive shafts to space it out

[Battle_axe]

ahh u beet me to it i will do one of these very soon just need to buy the new car to use to make it

[westie]

hi people, i bought a macnum just as a bit of fun, and to try some mods,
after running the truck a couple of times i have found the truck to be able to wheely far to easily, and the only truck to beat me on that day was a X60 due to the fact it had a better drive out the corners.

so i went and bought another macnum as they are nice and cheap and hear is what ive done so far

http://i42.photobucket.com/albums/e349/leelexus/IMG_0066.jpg

first of all i have made a carbon t plate. as the std one is very weak

http://i42.photobucket.com/albums/e349/leelexus/IMG_0068.jpg

i then started to trim the chassis to take the gearbox the other way round.

http://i42.photobucket.com/albums/e349/leelexus/IMG_0069.jpg

i then started to trim the other side away and found that i have to remove alot of plastic, so that only 2 of the screws holding the t plate can be used.

http://i42.photobucket.com/albums/e349/leelexus/IMG_0067.jpg

as you can see hear. due to this little problem i am going to make a wrap around brace to go arround the motor and bot to the chassis. to put strenth back into it their.

http://i42.photobucket.com/albums/e349/leelexus/IMG_0070.jpg

so you get an idea i am thinking of making a brace over the motor and going down the the chassis eather side of the battery slot.

i have a few more bits to fabricate and looking at making a rear hinge pin hanger / shock tower mount to the back of the gearbox.


Could you use a Mtroniks 400 sized motor that they use on there g2 systems as there alot smaller in dia than 540's

Luke

[madmax]

ive never used the mtronics brushless equipment, so i wouldnt know

[westie]

ive never used the mtronics brushless equipment, so i wouldnt know

Just a thought mate :)

[RC-ReSa]

Hello,
have you a result of your mid conversion?
rené

[cooper_xl]

What it's the advantage of the 4th gear in a mid-motor conversion?

[kaylon]

What it's the advantage of the 4th gear in a mid-motor conversion?

It's another idle so you don't have to run the motor in reverse...

J

[cooper_xl]

It's another idle so you don't have to run the motor in reverse...

J

yes but what would it happen with the motor running in reverse?

[Ferret]

What it's the advantage of the 4th gear in a mid-motor conversion?

It promotes more rearward weight transfer under acceleration.

Avner.

[Wacker 2]

It promotes more rearward weight transfer under acceleration.

Avner.

It also allows for much better control of the car in the air (after a jump etc).

You can use the force of the motor and the weight of the wheel rotation to balance the car in the air. Like when you hold onto a motor whilst not mounted in the car and hit full throttle, the motor almost twists out of your hand - acts the same way in the car.

3 gear is no good... 4 gear is the future!

Its the reason why the new Losi 22 comes with 2 different gearboxes depending on whether you're running rear motor or mid motor - one is 3 gear and one is 4 gear!

Looking good tho mace! Jon!