DSM1290 Posted January 5, 2016 Report Share Posted January 5, 2016 I feel dumb for asking this but i just don't understand. Can someone explain to me how the fuel makes it through a roots style supercharger. I don't understand how when the carbs mount on top of the blower they make it down past the screws into the rest of the engine. It seems like to me that the screws should "crush" the fuel and lock up the system. I understand the basics of how blowers work and what not. And understand that compression takes place in the intake manifold. But don't get how the fuel gets there. Thanks. Quote Link to comment Share on other sites More sharing options...
STEVE-O Posted January 5, 2016 Report Share Posted January 5, 2016 http://victorylibrary.com/mopar/blower-carb6.htm Quote Link to comment Share on other sites More sharing options...
EssFo Posted January 5, 2016 Report Share Posted January 5, 2016 "Pressurized air/fuel mixture enters the engine’s intake manifold from the supercharger’s discharge port. This is the easiest method in that the carburetor never “sees” boost pressure" Quote Link to comment Share on other sites More sharing options...
Cordell Posted January 5, 2016 Report Share Posted January 5, 2016 You have to remember that fuel is getting pulled out of the carb and turning into a vapor fairly quickly. I think you may be picturing raw fuel, but raw fuel doesn't burn only the vapor. Now while a carb doesn't do the best job atomizing fuel it's not terrible at it. The roots blower just compresses that mixture and shoves it in the engine. There is still more air then fuel so it will compress without issue. Quote Link to comment Share on other sites More sharing options...
iwashmycar Posted January 5, 2016 Report Share Posted January 5, 2016 I think most A/F ratios are in the teens, so that is one part fuel to some-teen parts air and an engine sucks a LOT of air. Over that course the fuel is spread pretty thinly as vapor in the air. Quote Link to comment Share on other sites More sharing options...
SHIEF Posted January 5, 2016 Report Share Posted January 5, 2016 I think most A/F ratios are in the teens, so that is one part fuel to some-teen parts air and an engine sucks a LOT of air. Over that course the fuel is spread pretty thinly as vapor in the air. You will be blowing your engine up shortly if your AFs are in the teens with carbs and a blower. Mid 12's is cutting it close. Quote Link to comment Share on other sites More sharing options...
iwashmycar Posted January 5, 2016 Report Share Posted January 5, 2016 Ohhh. I guess I was thinking NA. Still a very large ratio of air to actual fuel. Quote Link to comment Share on other sites More sharing options...
DSM1290 Posted January 7, 2016 Author Report Share Posted January 7, 2016 yeah i didn't really think of the fuel getting atomized. I was thinking of mass liquid fuel getting pushed through Quote Link to comment Share on other sites More sharing options...
buelliganx1 Posted January 8, 2016 Report Share Posted January 8, 2016 You also have to remember that the fuel does not pass down between the screws it goes around the outside. Quote Link to comment Share on other sites More sharing options...
Otis Nice Posted January 13, 2016 Report Share Posted January 13, 2016 http://cdn4.pitchfork.com/news/44846/7914ab00.jpg Quote Link to comment Share on other sites More sharing options...
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