I have been in contact with Dave Kennedy of SCX about these very questions. We are free to tweak the rules slightly to fulfill our needs for the qualifying race. Here is what he told me
We (local club, Monte) are making plans to host a SCX qualifier and I have a few questions regarding the rules. Rules state that cars must use full windows and stock interior but then later state that any SCX interior tray may be used. Which is correct?
Additionally I have a question regarding tires. You encourage a spec tire, which I think is a good idea. Rules state that SCX Pro parts can be used and I would take that to include wheels. To the best of my knowledge the Pro wheels are sized differently than the stock plastic wheels. So, if we are to use a spec tire then shouldn't everyone use the same wheel or did you mean a spec brand, no matter the size?
Rico Locati (reek455)
Yeah, this was not one of my better rules to include in this... You can use the interior from any car but it must not be lightened or modified.
As a track host your club can modify the rules to suit the house rules, so if you want to ignore that rule you can and you can race the cars "with the original interior in an unmodified form" if that makes it easier.
The rule will you refer to will be eliminated next year.
I meant a specific brand of tire as well as a specific part number, but that part of the rules refers to the final race only.
The Pro wheels are a slightly different size so we had 3 different sizes of tires on hand for the race in Philly. You can choose to race whatever brand works best on your track. That's up to the discretion of the track hosts.
One of the problems is that the Corvette (with stock wheels) uses a different sized tire from the other GT cars (which, if my memory serves all do share a common tire size). So you can stipulate for your race a specific brand or exact sizes of tires if you choose to.
For the final race, there is only the Ferrari FXX, so there are only 2 choices (a third if you count the 16mm wheels) and Rich has a huge selection of tires on hand for that race.
My own thought on this is to have everyone use stock wheels and a spec brand of tire to eliminate confusion and if we decide to use hand out tires the day of the race only two sizes would be needed. I vote for IndyGrips based on price, performance and availability. It was my understanding from the brief meeting at the last BSCC race we decided to trust each other on these matters. Each racer is to provide their own car for the qualifier and their own FXX for the Nationals.
Race cars are neither beautiful nor ugly. They become beautiful when they win.