hatchsub Posted February 11, 2007 Share Posted February 11, 2007 Hey i was just curious if anyone has tried to make one of these carbs work on a subaru. They are really great carbs from what ive heard. http://www.barrygrant.com/demon/default.aspx?page=5a Quote Link to comment Share on other sites More sharing options...
Reveeen Posted February 11, 2007 Share Posted February 11, 2007 With the smallest flowing 350cfm I would *think* it would be rather large for a 1800cc (or less) engine? Anyhow: http://www.jegs.com/webapp/wcs/stores/servlet/product_10001_10002_755536_-1_10271 $314 each Quote Link to comment Share on other sites More sharing options...
hatchsub Posted February 11, 2007 Author Share Posted February 11, 2007 There are just some unknowns with it. It will need a custom spacer to bolt to our manifolds as well as a custom mount for the throttle cable as the linkage will most likely be in the front. Quote Link to comment Share on other sites More sharing options...
Reveeen Posted February 11, 2007 Share Posted February 11, 2007 350CFM is too large for general use on an 1800cc engine, never mind a poorly flowing Subaru engine, under certain conditions it would work ok, but not under general driving use. Quote Link to comment Share on other sites More sharing options...
hatchsub Posted February 11, 2007 Author Share Posted February 11, 2007 Anyone know what the CFM on the weber 32/36 is for comparison? Quote Link to comment Share on other sites More sharing options...
Reveeen Posted February 11, 2007 Share Posted February 11, 2007 The Weber is rated at 325cfm, but it is what is called a progressive carburator, meaning it does not open all at once. This is done so that you do not have driveability problems. For a carb to operate effeciently/properly there has to be some vacuum in the intake manifold (or the intake manifold must be at a lower pressure than the surrounding air), this does two things, it keeps air moving in the right direction and it causes the fuel to be drawn into the engine. If you install too big a carb on an engine and open it up the low pressure area (in the intake manafold) dissappears and no fuel is drawn in. Quote Link to comment Share on other sites More sharing options...
SOOBOUTLAW Posted February 12, 2007 Share Posted February 12, 2007 They have a 250 Demon two barrel. I've seen it on a six-pack setup for v-8's. Summit has that kit. They might sell individual carbs too. That would be sweet. Quote Link to comment Share on other sites More sharing options...
hatchsub Posted February 12, 2007 Author Share Posted February 12, 2007 Yeah i found the 6 pack setup http://www.barrygrant.com/news/articles/products/product_004.aspx It seems that they only offer that carb with that 6 pack manifold but that seems odd. I bet if someone really wanted just the center carb with electric choke it could be had. 250 CFM sounds about right for our sooby engines. Only thing i wonder is if that is any bigger than a stock hitachi. Anyone know? Quote Link to comment Share on other sites More sharing options...
hatchsub Posted February 13, 2007 Author Share Posted February 13, 2007 anyone? 250 cfm sounds about right. Do you think it would be do-able as its going to be cheaper than a weber new. Quote Link to comment Share on other sites More sharing options...
4x4_Welder Posted February 13, 2007 Share Posted February 13, 2007 I'm working on a custom intake for a single Holley 2bbl pattern, using a Motorcraft 2150 carb at 285cfm. They produced those carbs from 220cfm up to 450cfm, and I have a few to choose from. A custom intake will be needed, though, since the carb is rotated 90º. The Weber and stock Hitachi are vacuum secondary carbs, while the Motorcraft, Holley, and Demon are straight 2BBL carbs, with both throttle blades opening at the same time. Quote Link to comment Share on other sites More sharing options...
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