Originally posted by Dan Nixon:
Did David Z use the stock 60mm throttle body? If so, that is someone who should try the 65mm,
Instead of using 3L valves since the steel inserts are an expensive PITA, how about custom big valves with stock size/mnarrow stems? Too expensive?
It's not the stems that are larger, it's the valve face. The larger valve face is what creates the problem, custom or not. The distance between the seats is where the steel inserts would need to go...
