Macnum and Xirius Race 3900 brushless pinions

[soane]

I've just bought the Ansmann brushless combo and haven't even considered which pinion to use, any advice?

[minke]

depends if you want speed or acceleration. Personally 23T pinion is a good starting point

[soane]

Top speed isn't necessary, good acceleration is the goal.

[soane]

Well the combo turned up yesterday courtesy of Modelsport and straight away I was impressed with the packaging, nice foam insert with all the parts nicely laid out. Now as far as I know this is included in the Madrat RTR (?) but the controller doesn't fit into the chassis so for now it has to go on top of the battery retainer. The biggest gripe thought is the lack of set-up instructions, it comes with a program card but doesn't tell me how to use it, it doesn't tell me how to wire the motor correctly, the little cooling fan runs constantly and also what it does say in the small manual doesn't tie-up with what the controller does when I switch it on. It does work and brakes OK but I don't know if it is set-up at it's best, I'll pop and see Dave at TOP tomorrow to make sure it's all OK.

[minke]

Your pics arent showing. Never had a macnum myself but there should be plenty of space to fit the esc. Try to post em again.

[soane]

I tried again and there is about 0.5mm in it but I can just squeeze it in:



It is an interference fit, the capacitor lead is in the wrong place! I'm beginning to think this isn't the one that comes with the RTR.

[minke]

Yeah looks pretty tight, will it go another way round? The capacitor cant stay where it is now. I have my exceed in with good quality velcro, gives you a little extra height to play with.

[soane]

Well after some fettling I managed to get the esc in:



It looks a whole lot tidier now!



Now over to another problem, when it accelerates, for about a second there is a grinding noise that goes almost immediately, could the slipper be too loose?

[soane]

Minke, do you have any photo's of your MR?

[B4power]

Your slipper clutch nut sure looks close to the end of the top shaft's threading. I would tighten it way more. Like atleast a turn. It should only slip for a few feet when giving full throttle on dirt.

Make sure your diff is tight enough too. Make sure not to overthighten thought.

[soane]

Agreed, this is accelerating on a grippy kitchen floor so I'd imagine there should be little or no noise? I think it best if I strip the 'box and rebuild it - I bought it complete.

[soane]

Also, I still don't know how to use the programming card!

[soane]

Right, time to wrap this up, the set-up instructions in the box are wrong, they're for the G2 esc (doh) and I've found the right ones on Ansmanns website as a pdf but they're in German - after using Babelfish I get the general idea of what's going on. Also I've been testing the car without the gear cover, as a consequence I didn't notice the motor pinion shaft is too long and fouls on the cover when tightened up (double-doh) so that needs seeing to - what an eventful day.

[B4power]

Well, if your tires are slipping, you should here a sound. But, if you say your kitchen has a grippy floor, yes you shouldn't hear much sound.

As for the programming card, go on the website. They must have a section where you can download manuals and stuff.

[minke]

When you get the alu motor mount, which is a very important upgrade the cover will fit just fine,

[soane]

Off to TOP today with a shopping list it seems, I came down this morning to find two pools of oil beneath the front shocks I just bought an fitted. I'll order the motor mount and maybe the turnbuckles.

[B4power]

What kind of shocks were they? That kinda sucks.