Rough idle after track day?
 

I took my 83 sc to a DE track day and after a couple of sessions the idle became very rough but ran fine at higher rpm's. any thoughts? I should also add that i added some octane boost before the session. I had never used it before.

What kind of octane booster?

Did you over-rev the engine (exceed redline)?

I am assuming you are home from the event. Have you put more fuel in the tank? How does it idle now?

(Welcome to the Board!)