This is not a motor forum, BUT.......

Shaving some off the trailing edge will help with amp draw in a race, or in other words make run time. A hole will only help a little so will serrating the brush. All this makes for less brush drag on the com. Shaving a small portion off the trailing edge reduces overlap and makes the best way to make run time. I never had a problem with 3300s anyhow.

I dont' think the brush should be narrower than .140 in a stock motor. .140 is the RECOMENDED width for a MVP stock motor with both side shaved evenly. Only go back a little ways so the brushes stay straight in the holder. (hoods)

We can also run lighter spring tension in 1/12 than the sedans because the amp draw isn't as hard so lighter springs (green/green) can help if arcing is not a problem. I usually run red on + and green on - .

To answer your question, I would start with .010 and see if it helps, then maybe .015" A brush measures .185 to .190 so no more than .020", or .5mm.

Re: Re: 1/12th Arbor
 

Mike D: I call Mimi yesterday, and it looks like you got the last Hudy 1/12th arbor. :( Thus far, I've called about 6 or 7 shops and nobody seems to have them. As a matter of fact, I was told by one shop that they have had them on back order for a while. Oh well!!!

check out rc4less.com They have a universal arbor that some guys at my track use.

check out larrysperformancercs.com They had a pretty good assortment of arbors in stock when I was there on Monday...

I'm not sure if they had a Hudy 12th scale...but it would be worth a try.

Their online shop is still just starting up..so you may be best of contacting them by email or phone to inquire

Thanks guys. I'll give Larry's a call. I knew about the arbor sold by R/C4Less, but after being "burnt" with my purchase of the Ofna arbor, I'm a bit hesitant to try something unknown to me. :confused:

Geppetto

You can get the ofna arbor to work fine with some mods to it. A dremel, some shims and assemble the wheel on the arbor before you put it on the truer and you are good to go. I will explain tonight, I must leave for cleveland as we speak.

If I have to buy a motor lathe, what would that be...? My guess is HUDY cause I use them on my nitro cars..........just want to make sure HUDY is the one.

If there are something else that I should consider....please share with me...thanks.

YES....I called HUDY, and almost all the 12th scale items are back ordered....arbor, 12th scale adaptor....etc

Integy make some very very nice lathes

Yes, I use the Integy XIPP X-MOD Super Lathe.

For arbors, also look at the Integy arbors. Their 1/12 is really well done, and fits hudy.

I race a 12L3 there was 2 heats of 1/12 last week I'm sure anyone of those guys could help you out.

Hit the Cleveland thread for the CEFX pics. Credit definatley goes out to RCTech.net and NashRCRacer for providing coverage. nash has some photos on his site as well.... Check them out.

I'm planning on getting a new chassis plate for my 1/12, probably a hyperdrive chassis plate ( a really rigid l3 chassis). I currently have a yrx-12 with all the ssg stuff. I race on a super high traction carpet track and I'm curious if it;s really worth getting. It seems like the sgg stuff is stiff already. Might I mention I'm totally new to 1/12.

-Sushi Boy

Sushi Boy, I would look at the Quad12 conversion for your Yok.
Contact SpeedXL directly about this, he has done this exact conversion.

Rookie, you cannot go wrong with a Hudy Lathe. I had an Integy Xipp Mod lathe, and I sold it to buy a Hudy Tech Lathe. The other "Hot Lathe" on the market today is the Fantom. Piece of art, but very expensive. I save almost 100 bucks getting the hudy.