Tuning a Demon Carb

[ohno50]

Thanks for all of the help everyone. I found out some more info....
850 Demon Carb w/ mechanical secondaries. Due to the duration of the cam, I am guessing that its a "Mighty Demon". The engine is a Ford Racing 460 Crate Engine (P/N M-6007F460FT).
Answering the question on driving style; I don't drive it super hard, I'll trounce on it now and then but the laws here in Ontario are pretty strict when it comes to muscle/performance cars and aggressive driving and the car is already a heat score when I'm just sitting at the stop light idling!!
I think I'll save up my $$ and get a proper dyno tune and see what that gets me. I imagine they'll say the carb is too big for what I need but I'll deal with that when it happens. Still a blast to drive though, as you all know there's nothing like having a 550hp go kart!!!

[DAVID GAGNARD]

What is your vacum reading at idle???? I'm guessing pretty low, maybe 10 to 12 or less....also guessing when you get on the gas, with very little vacum, it hesitates because as you open the butterflys the vacum drops even more, making off idle responce even worse......

I think your engine and driving style would be better suited to a carb with no more than 750 cfm rating.......

David