I am signed up to race at Laguna Seca on the 24th. The last time I was on that track was in the early 80’s before the track change. My question is do you run a little higher tire pressure than sprint racing since the straights are so long? I am running a world formula because that is what I have for now. If I like it I’ll build a kart just for long track road racing. I hope to meet a lot of nice people at the track.
Jack, I’ve never raced Laguna Seca, but I’ve road raced a good deal. I’ve found that the answer is: it depends. With the harder compounds, we ran higher pressures than standard sprint pressures. With softer tires, such as Dunlop D_M or Hoosier R60a, I ran sprint pressures. I’m not sure what type of compound you’re using.
I ran a yamaha sit up for many years with NCK. Tires will not be an issue for your world formula. You can run several races on a new set. You will find that too much grip in the lower hp classes actually binds it up and slows you down in the corners. You want the kart to be as free as possible to keep the rpm’s up.
Good luck. Most of all have fun and see greens and checkereds.
MG yellows for this weekend – greens may be an option, if the weather starts to get above mid 70’s. I treat LS just like it’s a big sprint track, so I use pressures very similar to my sprint setup. Run used tires for the practice, and your new tires for the two heats. Flipping tires side to side is an option between the races, for me it depends on how much wear I am getting on the front insides.
We generally run 3-5 psig higher pressure at road racing tracks than we do at sprint tracks. This increase has nothing to do with rolling resistance, but is a product of making sure that the bead stays seated on the rim. If the pressure is too low, the bead will unseat even with beadlocks.