I have been running a 1986 5 series in rallycross for the last few years. It has been a huge amount of fun and a good learning tool. The east coast challenge is now a one day drive away and the national championships is near family. I am trying to decide if I run the 5 series for another year or get something else this spring.
The 5 series needs a minor air conditioning repair that requires a bunch of labor and it needs a suspension upgrade. I have tried a few off the shelf kits for suspension and I am going to need something custom for the front. I have bottomed out the suspension into a rock strike on the skid plate enough that I have trashed the skid plate mounts. I estimate those two major repairs, rally tires, and some other minor stuff to cost roughly $4000-$5000.
I started thinking about what else could compete in the stock RWD class for about $5000 all in. That means car, set of wheels with snow tires, skid plate, trailer hitch, and a bushing/cooling system/etc refresh. AC that works better than the 5 series is a big plus for the July trip. I am expecting most of the drive to be around 100 degrees. An airbag would be nice as well. I am 6'6" tall and I need to fit in the car with stock seats and a helmet. This removes all mazda products and 80s bmws (including the 5 series) among other things.
I think the obvious answer is an e36 bmw. I have a soft spot for the 318ti because it is very close to a Z3 Coupe I owned. I drove one on a fun run at the last rallycross event and was pretty happy with it. The 325i has better suspension and more power so I could be convinced there. Either way the cars would have to have no sunroof and be a 1995 for the 318ti or a 1992-1995 for the 325i for access to an LSD.
What other options are out there? I probably don't fit in a 1st or 2nd gen mr2. Trying to avoid the usual suspects of early rx7, porsche 944, and volvo 240 because I don't really want to drive cross country with early 80s AC and safety features. I think I am looking for a BRZ with more headroom (I don't even fit without a helmet) and in budget. Does that exist?