Anybody run the new IRS 1/12th caster blocks? Opinions?

I have been using the IRS caster blocks since the last Snowbirds race. You can adjust roll center, reactive caster, camber, caster, and caster gain. I would say it is the most adjustable suspension, probably equal to the Trinity. It uses the Associated lower A arms and spindles from the dynamic strut, but does not have the same issues with caster. IRS has some neat little nylon spacers for caster adjustment than don't deform in a crash. It stays consistent, even through hard hits. It is currently available on the IRS website. I suggest also using the IRS king pins. They are super easy to use.

Re: 1/12th Arbor
 

Geppetto - Yeah, I got an Ofna lathe. The Ofna arbors are awful. The Hudy arbors are a direct fit and work real well.

on the SM tubes... I guess my track's boards arent rough enough, or i am not trying enough, lol.

DavidL- You are going to be in Cleveland right? Do you know if IRS will be selling those castor blocks (12th scale) there? I defently want to pick a set up.

i just got a good deal on some rear green tires and grey fronts. I am very new to 1/12th cars and am just wondering if i will have a problem driving with these tires. is this a bad combonation? I am running on a very short carpet and am using a 12l3 with a p2k2 motor.

http://24.65.250.89/nascar/Images/Co...Carpet_003.jpg
what is the best gearing on this track when using a 12l3 with a p2k2. I don't really care about rollout and such just yet. A rough estimate for gearing would be nice.


What is the difference between 48 and 64 pitch for gears? Is there an advantages over the other to using?

I would start with a 30/100 with 64 pitch. The reason guys run 64 and not 48 pitch with onroad is because you can adjust your gear ratio to a more exact extent. Also it is smoother and less drag (most likely, and to what extent is arguable). That track is actually a pretty decent size and seems to have a very fast layout for most carpet tracks.

ya know if you actually asked the guys who race on this track you'll get better results.

:nod:

that track is 95'x 48'

do you race a 1/12th cracked? if so what do you use?

I cut the comm every 2 runs (only needs a super light skim). I'll try the slot, has anyone experimented with narrowing the faces of the brush yet? What is the benefit of this?

-Sushi Boy

Sushi Boy--I just shave off the trailing edge and leave the rest of the brush.

narrowing the brush can help with glitching (sometimes) and also reducing amp draw.

Also dont forget about the new Orion V2. I have heard alot of good results. I saw JP reunning one in offroad. Looked very smooth and seemed to have very little comm wear as expected. Alot of the guys are filing the brushes down...

How much do you shave off exactly?

-Sushi Boy