No one friend who is a class racer said he picked up almost 40 hp just jetting the Holley on his new BBC. Last time they used it was on his old combo and seemed to run well but without a wide band you're just guessing and that's what he was going I guess. He also said that with the dual plane intake they has to crossjet the carburetor to get it right. That's a ton of power to pick up from something so simple.
Sorry I can't give you guys any numbers as these guys are pretty secretive on this kind of stuff.
Sorry I can't give you guys any numbers as these guys are pretty secretive on this kind of stuff.