Whats the main difference? Do they still pull vaccume like normal carbs so i can keep my power brakes hooked up, even with it on a supercharger? But my boost guage will have to be on the manifold now... what about the tranny modulator? it was on the manifold but not with Boost it will mess it all up, can i connect that to the carb instead?

 

Eh Im getting a 750 Manual secondary Blower carb tommarow. Any help with what to expect would be nice, its not new its goina need rebuilding i.e. i have no instructions so help is much appreciated.
Anyone have a roots style blower with a supercharger carb on it? How does this thing work?

 

Carbs on roots blowers work pretty much normally without any modifications. Just hook any vacuum powered accesories to the carb rather than the manifold under the blower...if there even are any provisions under it. Holley even sells a blower-specific line of carbs I believe that has the idle circuits calibrated to suit it a little more if you wnna make it real easy.

 

I heard that the predator carbs work GREAT on a supercharger. Not many people know about 'em, though. They flow LOTS of air and are supposed to have a nice idle circuit built into the street model.

 

Main thing is to block the power valves on a Holley with a Roots style blower.Post all your specs and I can get you real close on the jetting

 

I havnt got the carb yet. I thought special "Blower" carbs had "manifold referenced power valves" thats why they are $400.00 more than the average carb??? Im gonna wait till i get the carb then try to figure out how it works. Ive already got a 850 Holley without power valves on my car (backfires alot, removed power valves cause they got too expensive) and it seems ok i keep it a little rich tho at wot like 12:1 and i get like 3 MPG my cruise is like 14:1 it doesnt make sense but whatever...
maybe its like 3500 Stall lolol