On point 1 - sorry for the confusion - I actually live and compete in Dubai where we sort of do our own thing for AutoX classification; to sum it up the cars are classed by engine size and whether they are modified or unmodified and that's it. That's why, since I'm technically modified, I'm running against very nighly modified cars - we're all lumped into one huge modified category. Definitely nothing near as precise as the SCCA regs are but what to do - we only have 30 or so regular competitors and as it is we're already stuck with less than 10 people per class!
Anyhow, thanks for the advice on the 285s Warrtalon. Since I had an small accident lately (not my fault of course, which means the other guy gets to pay!) which damaged 3 of my rims I've been thinking of taking the opportuity to upgrade and I'm hoping that jumping from 235mm wide semislicks to 285mm semis would make a noticeable difference in terms of available grip - at least enough to partly justify the spend on new rims and rubber!
I know your full slicks would run rings around the Bridgestone RE55s I'm running but although I'm a competitive person I'm just not competitive enough to force myself to change tires at the track at 7:30am before each race
After doing a little searching, it seems that 5Zigen FNC01RCs in 18x9.5 should fit 265/35/18 or 285/35/18 rubber so I'm leaning that way - apparently no spacers needed.
Curious qhat your thoughts are on alignment - think toe out all around is a good idea? I like it on the track but it sort of makes the handling a bit spooky on the street...