looking to this chart Team Associated B6 & B6D - Arm Mount Pill Chart , what does pivot position mean?

Rear hub height talk to me.

When going from 0 to +3 what is the difference to the roll centre? Is it higher or lower.

Cheers

Rebuilt shocks with new xrings this weekend. Can the xrings be "refreshed" or rejuvenated at all so i'm not blowing 10 bucks every rebuild? The rubber seems more pliable and supple than the old red o-rings so do they last longer? Anything to bring them back after they have swollen up?

No, but how often are you rebuilding?

I might be converting my B6D to offroad eventually.
Latemodels are dying out here Unfortunatley.
I haven't raced at that track in 2 months and they have stopped showing up.
I just hope the body and wing are strong. I had a launch model original B44 4 wheeler and the wings were garbage. One weekend I trashed mine.

Once a month... about every 4 runs.

Seems a bit quick , are you using green slime? How abrasive of an environment are you in as well?

Yea a bunch of green slime and I just run on hard packed clay. How often should i be rebuilding?

My current track is eating orings. Need to be replaced every couple weeks or so. Anyone find orings in bulk? Mcmaster carr?

I never had good luck with the ones from mcmaster during the B4 era. They always had a lot of stiction. There's gotta be somewhere that has these in bulk though.

The traxxas xrings use to be ok in the original B5 V1 shocks. Not sure if anyone uses them anymore.

How many people using machine pistons.the out side is different size from the stock pistons.why.and do I need to up on oil.thanks

What tire insert are racers running in their rear tires on astroturf?

Schumacher Medium blue foam

I would say most are using machined pistons, its not that they are larger...but they are machined to a better tolerance than the molded pistons could ever be. You shouldn't need to change oil thickness.

I use JC Dirt Tech in the rear....like anything its a tuning option.