MR4-BC.

[Dingbat]

Almost ready for some club bashing.
It's not quite vintage but It Is definitely old.





Not sure what motor to use at the moment.
I have a stack of good brushed motors and a stack of good
NimH stick packs.
One GM brushless pro 97290 10.5
but I think It's for touring cars.
Any advice Is most welcome.

Cheers.
Db.

[chris brown]

Its a great car. What surface are you racing on?
You can still get spares on ebay and there are a load of set ups about if you google for them.
It looks like you have got the mr4bcspecial there too with a lot of the option parts on.

[Dingbat]

Cheers Chris,
Yes It does have quite a few upgrade parts including a one way front
differential.
I'm not to sure about using the one way front because when you come off the throttle whilst turning,the rear end slides out when the motor slows the rear wheels down.(like lifting the hand brake in a real car)
It wouldn't be to bad if I could adjust the amount of front freewheel,
to make the rear just slide slightly rather than handbrake on and handbrake off.

Anyhow It's quite an old buggy and I shouldn't get too technical,
I do have a few spares including four chassis,four of each drive belts,
a dozen wheels including some alloy wheel adaptors,
suspension arms and steering knuckles.

I'll be using it outdoors on astro
and i have never raced on astro before,
I've currently got the brushless motor installed and I'm using
NimH battery packs between 3800 mAh and 4300 mAh.
these seem to last about 10 ish minutes giving it lots of full throttle.

Any motor help much appreciated.

Db.

[chris brown]

Hello.Not sure what you mean by motor help. If your track is tight and technical then your 13.5 will be really good and you will probably beat higher powered cars in the corners but will really suffer in the straights. Also the car doesnt have a slipper clutch so I wouldnt go overboard on the motor you use. 7.5 tops I would say. You could use a more powerfull one but you take the risk too of the drive train not being able to cope with the torque of a brushless motor. The front one way should be really good to use on astro turf as the rear wont slide on astro, correct tires needed of course.

[Dingbat]

Thanks Chris,
just the sort of advice I needed.

[Bikerbob]

Still running mine, keep breaking servo arms.. hate that outboard steering.

We are indoor on a hook and loop low pile carpet.. but reducing the grip of the buggy is the problem right now.

otherwise I still love it.. I have lots of spares.. so I keep running.

james

[misterfixit]

Hi all,

I own this car now. I bought it on ebay a few months ago.. real surprised to see the exact same car on the forum here.

Was it you I bought it from Dingbat or had it changed hands since you made this?

I'll try to post some pics as I rebuild it. Looks like it'll be alot of fun. I have a mint plain old BC and I bought this to use as a street beater out here. But after tearing into it a bit I think I'll be giving it the once over to keep it sweet. (My little YR-4II will keep the beater honours)

If anyone needs details on the slipper I'll tear it down and do some drawings of it.

Other questions, does anyone have a centre oneway (without the slipper) for one of these?

Dingbat, it'd be awesome to hear from you.

Cheers

Rich

Originally Posted by Dingbat

Almost ready for some club bashing.
It's not quite vintage but It Is definitely old.





Not sure what motor to use at the moment.
I have a stack of good brushed motors and a stack of good
NimH stick packs.
One GM brushless pro 97290 10.5
but I think It's for touring cars.
Any advice Is most welcome.

Cheers.
Db.