Richard:
Each
driver is issued a number. So 2 people will have 2 different numbers whether they share a car, or drive their own individual car.
Number changes are critical only during timed runs at events, so the Timing Team can see who's about to do their timed runs. During practice runs, one set of numbers can suffice for the cornerworkers to call in DNF's or control issues. It is common for a shared-car to have one set of numbers during the practice sessions.
Numbers range in the triple digits right now. So, plan on having a 200, 300, 400-series number. Often, people order their numbers with an additional numeral "1", so all you have to do is stick the "1" up to change the number (ie: 494 becomes 1494).
You can request a number prior to an event through the event registrar, or wait until the day of the event, and bring tape to display the number. (Personally, I'd ask for a number ahead of time, and go to some place like edecals.com, or other decal shop to order the numbers.) Contact
Prereg@pcasdr.org for details about number asignment, and availability (like number 927, if your birthday is September 27th). Numbers issued to individuals remain locked until that person releases the number, so there's no risk of any number duplication.
Hope this helps!
Dan Chambers"It's
just a "well prepared" street car ... or a very, very well-mannered track car."
1983 SC #91 3.6L, "Black Pearl" Livery
1987 944 (gone but not forgotten)