Good points, and I am going to have to think about that. I made the mistake of running my smallest capacity battery in the main, and I do feel it slacked off a bit near the end. It also didn't have the over-all zip of one of my other batteries that I should have used for the main. I'm having fun, this whole spec/stock racing is new for me. I'm a big fan of modified where I can run more budget oriented stuff or old batts and not have it come into play during a race and just motor up. This is the first time I've ever really felt like my battery held me back in a race. I say that simply because it wasn't as fast right from the start as the car had been in the qualifiers, and my buddy motor'd me down for the win I knew he was coming, and it was obvious he had more ponies than me in that race. Really need to get there on a practice day to play and sort things out.

There's not a lot of 1/12 racing here in Michigan that I know of. This place I'm racing at is "new." It's a track that moved locations, and ran 1/12 about ten years ago, but everybody stopped for whatever reason and it became oval only. Now they're trying to drum up interest and do road coarse anything with wheels, along with oval, and carpet off-road. I know there's a carpet track in West Michigan, I hope to go there and sounds like they have some really fast guys there. There is also supposed to be some local fast dudes from here starting to show up, that will be exciting to get more cars in the main.

I keep hearing all these roll outs in the 95-105mm range and I am curious as to what motor timing you are running these roll outs with. That plays a significant role (roll if pun intended). I just mean you can't tell people the roll out if you aren't telling them the timing as well. Some run 20-30 deg and some are running 55 deg and the roll outs are significantly different.

found the following on RedRC this evening. Looks very interesting.

"New from Zen Racing and made for a range of 1/12th scale pan cars is the slot pivot. Sporting the same footprint as the standard Team Associated centre pivot, it takes only seconds to install and forget about. Due to the open design the pivot ball is free to move forwards and backwards in roll, reducing the locking effect and on top of that in the event of a crash it simply resets, doing away with tweak issues."

the new center pivot ball holder from Zen Racing looks like a really nice concept. However I run a CRC car. Can someone with an AE car please provide the c/l to c/l measurement between the two screws that attach the center pivot ball holder? I'm keen to find out if the neato new Zen Racing center pivot ball holder will fit on a CRC car.

Saw that, would like to try one out. Any local NA distributors?

This help any?

For those that haven't seen it;
http://www.redrc.net/2015/10/zen-rac...t/#more-103075

The CRC already has provision to let the center pivot slide fore and aft. Just leave the two aluminum locknuts that hold the "football" in place a little loose.

I guess the complete football assy would move L-R cause you have play between the screw/nut and the slothole. Tightening down fixes the assy.

What I find interesting on the new concept is that forward force to the chassis will be transferred from the center ball to the side links.
I'm unsure if these will hold.

Yes, there is a little play. But I don't notice any ill effects on the handling.

The side links seem fine with thrust levels for a 13.5 motor, but for more powerful motors they might be a problem.

Makes sense, the roll out numbers don't change but the performance achieved will vary with each number depending on timing. Motors are all different too, right? So really it's just a general number to throw out to which the driver needs to fine tune to their equipment, the track, and how they want the car to feel.

damn. looks like the AE pivot ball holder's spacing is substantially wider than on a CRC car. If somebody from Zen is listening.....there would probably be a nice market for their new sliding pivot ball holders only with screw spacing to fit a CRC chassis plate.

The best replacement pivot that I've found for the CRC part is the delrin one that C&M Motorsports makes.

http://www.hobbytalk.com/bbs1/showpo...&postcount=482

I'll be running modified (3.5) and wondering what tire diameter sizes I should start off with on low-medium grip CRC carpet. What are your thoughts?

I think he's looking for a captured nut version so that you can "detweek" your pod just by loosening the two outer mounts, straighten your pod, and tighten down again like you can on an AE based pivot mount. On the CRC it's not that simple, you need to pull off the upper plate and yada yada yada.

Smaller than you might think. Of course it depends on your wheel size, but i wouldn't start any bigger than 42 mm and thats even pretty big. In mod tires are usefull 1 to 2 runs in my experience. start them larger and you will grip roll. start them too small and you will run into the rim before the 8 mins are up. If I had to say an exact number i'd go with 40.9 rears and 39.9 fronts.