detonation / knock issue on 340

shimsham1 said
anyone have any experience with the quick fuel 600 series?
Quick Fuel SL-600-VS Quick Fuel Slayer Series Carburetors | Summit Racing

i have a 650 mech secondary QFT Slayer carb, the choke is nice.
i only adjusted idle mix and speed and it has run great on a mostly stock motor.