Hi to all. I’ve been checking on the site periodically as I haven’t had much time to work on my Pantera’s ( a 71, fairly stock and a 72 highly modified Group 5 conversion). I’m finally semi-retired and have time to work on them and am in the process of finalizing a 408 stroker motor for the 72.
I’m trying to determine the correct carb setup for it and have seen conflicting info. In looking at the forum posts for stroked clevelands a lot of folks are recommending the 850 or larger carbs. I tend to favor Barry Grant speed demon or mighty demon carbs as I’ve had good luck with them on my cobra replica and the 71 Pantera. The tech guys at Demon recommended a 750 cfm Mighty Demon with mechanical secondaries and annular-discharge boosters for my 408 setup. Everything about that set-up makes sense except for the 750 cfm part.
The engine has 4V closed chamber quench heads and is running a Holley Strip Dominator. The engine should have about a 10.7 compression ratio. Both the intake manifold and intake ports have been modified with Goodson cylinder head epoxy (similar to Terry Parkers Port Stuffers but with out the aluminum plates). In addition the head has a three angle valve job and some minor porting work. We used to do this in circle track racing in the old days and it seems to work well with these heads. The cam is a Comp Cams small base circle hydraulic roller with 110 lobe separation, 236 duration @ 50 degrees and .589/.617 lift.
Any real world advice on the carb sizing would be greatly appreciated.
Original Post
Not sure about actual flow rates of different carbs though. Havent used one of those things with all the screws and orfices in a while. Imagine that, gettin all dirty tuning and stuff, blech 
. Just kidding. Good luck with your project.
... but I thought I'd throw it out there.