How many tires do you think......

Thank you for the quick response, Jim

Thats what i thought.

Springs and shocks have been sorted.

8 tires, mounted and balanced.

See you on the track!
Cheers.
Bob

Also

300 or higher tread wear tires generally wear faster then race specific 200TW street tires, see Hankook rs4 and similar.

8 tires for CMP is a good idea, especially with a heavy car.  It is a rougher surface than most tracks and is known to be hard on tires. 

If we go back in the fall we will take 8 tires for our Beetle.  We used 4 new tires up completely last fall in an approx 2500 lb car - didn't even bother to save them for practice day at the next race.

One suggestion is to take 4 of your preferred tires and 4 good UHP all season (rain) tires for your backups. If you wear out the primaries you can run the rain tires with only a slight loss of performance (esp. for a new team/drivers).  If it rains you'll be prepared and have a slight advantage over the teams who don't run "wet" tires. At NOLA '19 we ran in our customary mid-pack "B" position all day Saturday, and then in the rain Sunday we were only a couple of seconds off the fastest lap times and progressed up the position chart nicely (for a Beetle).  Pretty sure it was because everyone else slowed down in the rain and our regular pace is so slow that we didn't have to slow down much, but having the rain tires may have helped.

In a 24 hour race you will want to swap or rotate your tires at least once during the race to even the wear.

My Volvo will do an entire 24 hour race at Buttonwillow on a single set of 200 treadwear tires, but we went through 8 tires at Inde in AZ in a 14 hour race.  Size, treadwear, brand, and track surface all make a difference. I don't know CMP, but 8 tires is always better than 4.

Do you know what tires and size you plan to use?

For a 24 hour race in a heavy car at CMP, I'd add at least two tires to my suggestion above (total of 10).  You can always run unused tires at your next race. As RB92673 mentioned, you'll need to check them at fuel stops/driver changes and expect to rotate them at some point.  If my team was going back this year , we would take 6 BFG Rivals, 4 of the best used BFG SportComps from last year as spares (and for practice day), and 4 of our General GMax all seasons in case it rains (or if we burn through the other sets). We only leave the rain tires behind if the forecast the day before we leave says no rain for the race. We are fortunate to have plenty of rims. 

If you are a new team, take it easy at night. Most of my team's drivers drove the 24 at MSR in 2018.  All of us were pretty wide-eyed when we came off the track at night because you are overdriving your lights so badly - even with a good light bar and backing off the pace a little.  We all agreed that driving a full 24 once every three or four years was plenty.  We'll try again once the PTSD fades some.

Another suggestion for CMP is to take plenty of gas cans. If their pump breaks, there is one gas station right outside the gate but it is a two pump station, isn't open after 6pm or before 7am, and is priced like it is the only station in 20 miles (which it is).

We just got in
4 tires with a 500 tread wear
And 4 tires with a 300 tread wear