rustrodsrule Posted August 21, 2014 Share Posted August 21, 2014 Hi, Has anyone tried this.Thanks Mike Link to comment Share on other sites More sharing options...
f147pu Posted August 22, 2014 Share Posted August 22, 2014 Sure. Bob Green did it years ago on an Olympic and there was a 1930 speedster at the Trek this year with 3 side draft Webers. It can be done on any engine with the Swan type manifold but you probably will have to somehow add exhaust heat to the intake manifold. Link to comment Share on other sites More sharing options...
Steve Braverman Posted August 22, 2014 Share Posted August 22, 2014 Not sure that this would make any power improvement without other internal modifications. Link to comment Share on other sites More sharing options...
mikewest Posted August 22, 2014 Share Posted August 22, 2014 Not sure that this would make any power improvement without other internal modifications.Its been my experience that every conversion from updraft to downdraft makes a noticeable difference in performance. I had a 1914 Ford speedster that both manifolds were inverted. On that motor I installed a small Tillison carburetor from a Crosley, pressure feed and i It made a huge difference. I bought a 1929 Franklin sedan that had the intake turned over and on that car the previous owner had installed a model 97 Stromberg. My friend and fellow club member tells of a 28 Chev4 cyl that had a downdraft installed when he was a kid and gain he attests to its much improved performance. I would try it out ! Link to comment Share on other sites More sharing options...
Seldenguy Posted August 22, 2014 Share Posted August 22, 2014 As stripped down, lightened and modified your '14 T was it just barely beat the time that my completely stock '15 Roadster turned at the hill climb. I remember your remark about me "chirping" the T tires when I left the start line. Link to comment Share on other sites More sharing options...
hook Posted August 22, 2014 Share Posted August 22, 2014 Here's one for you to ponder. Link to comment Share on other sites More sharing options...
mikewest Posted August 23, 2014 Share Posted August 23, 2014 Bob, I had to let off so the rest of the guys had a chance.... Mike As stripped down, lightened and modified your '14 T was it just barely beat the time that my completely stock '15 Roadster turned at the hill climb. I remember your remark about me "chirping" the T tires when I left the start line. Link to comment Share on other sites More sharing options...
rustrodsrule Posted August 24, 2014 Author Share Posted August 24, 2014 Thanks for your reply. I saw when I assembled the engine that the manifold could be turned over to work as a down draft. That is what started me thinking about it. I have a 1 barrel carb off a 235 chevy so I think I will try it. Thanks again Mike Link to comment Share on other sites More sharing options...
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