FWC

I'll give that a look, Jon. Thanks!

I have a '70 L24, 75K miles, Nissan Comp. Autocross cam, headers, triple Mikuni carbs. My problem is that at light or steady throttle @ 3K RPM, I get a popping back through the carbs. Heavy acceleration at any RPM is good. Idle is good, no lean popping. Carbs are synched. I have used the search function and found peripheral information but nothing that directly addresses this problem. Any and all help would be great! Thanks. Frank