moosens Posted March 15, 2008 Share Posted March 15, 2008 Looking to maybe have some fun with one of the d/c setups I have. What's been done with dual carbs? Quote Link to comment Share on other sites More sharing options...
mcbrat Posted March 15, 2008 Share Posted March 15, 2008 well, to put the regular 32/36 webers on to a ea81 D/C setup, you need to make some carb adapters that moves the carbs away from each other about an inch each... then figure out the linkage.... of course those would be a bit of overkill like when I had my Holley 600 cfm on my Brat Quote Link to comment Share on other sites More sharing options...
hatchsub Posted March 15, 2008 Share Posted March 15, 2008 Im guessing you would probably want to jet them down a bit as well since that would be overkill, unless you had the special cam and heads from the EA81 RX. And then it would still be overkill Sidethought, isnt there a smaller weber than the 32/36 that would be more appropriate for that manifold? EDIT: Just went around the internet and looked. I guess the 32/36 is as small as they go. Quote Link to comment Share on other sites More sharing options...
moosens Posted March 16, 2008 Author Share Posted March 16, 2008 well, to put the regular 32/36 webers on to a ea81 D/C setup, you need to make some carb adapters that moves the carbs away from each other about an inch each... then figure out the linkage.... of course those would be a bit of overkill like when I had my Holley 600 cfm on my Brat That's what I needed to know,thanks. Yes,I'm aware of needing the hotter cam,etc. Quote Link to comment Share on other sites More sharing options...
Jerry DeMoss Posted March 16, 2008 Share Posted March 16, 2008 That's what I needed to know,thanks. Yes,I'm aware of needing the hotter cam,etc. A 272/260 grind for duals should suffice! I wanted to build an adapter plate as well to go onto a redline weber adapter for the dual carb set up. Never got the whole thing under way,just made some models with some wood. Quote Link to comment Share on other sites More sharing options...
moosens Posted March 16, 2008 Author Share Posted March 16, 2008 Has anyone seen any aircraft EA71's or EA81's with dual Webers or other non Hitachi? Thanks for the info,Jerry. Quote Link to comment Share on other sites More sharing options...
ben--ny Posted March 17, 2008 Share Posted March 17, 2008 dual bing carbs Quote Link to comment Share on other sites More sharing options...
moosens Posted March 17, 2008 Author Share Posted March 17, 2008 I've got ideas of Mikuni m/c four carb setups from a big bore bike. Then again,I have too many ideas. I do own a Puch Twingle with a Bing and have another matching carb in new form. They're mighty small though being on a 175cc bike. Quote Link to comment Share on other sites More sharing options...
joostvdw Posted March 17, 2008 Share Posted March 17, 2008 I know a handfull of people who use fireblade (from the honda motorbike) carbs on their cars, from jettas to peugeot 205s and they work fine, just be sure to increase the jetting Quote Link to comment Share on other sites More sharing options...
cobcob Posted March 17, 2008 Share Posted March 17, 2008 I've got ideas of Mikuni m/c four carb setups from a big bore bike. Then again,I have too many ideas. I do own a Puch Twingle with a Bing and have another matching carb in new form. They're mighty small though being on a 175cc bike. There's an old KZ650 sitting in the woods near me with a set of 4 Mikuni carbs on it... Maybe I should yank them and try to re-jet them a bit bigger for my Brat Quote Link to comment Share on other sites More sharing options...
moosens Posted March 17, 2008 Author Share Posted March 17, 2008 I'm kinda thinking it would be complete overkill Paul. The couple of guys I know who run sincronous 36/36 Webers say they pour in too much gas and bog pretty bad a low speeds. It would sure look sweet though. That's why I'm really looking for alternatives to a Weber twin setup. It'll be a low use,fun vehicle. There's no way I can go and compete with the Datsun guys at the straightlines but I'd like to have something similar. Wouldn't you know that today I saw the super bright yellow Datsun with slicks,etc...... that I'd seen last year and previous,but only two or three times. Two years ago this mang pulls up along side my '78 wagon in highway rushhour traffic (parade) and can't even smile at me. Just lights up the rears with the supercharger whining away. Pretty cool,but obviously he thought my ride needed to be shown his car's muscle. I'll kick his rump roast in snow and ice !!!! :-p OK,back to the multi-carb setup. Quote Link to comment Share on other sites More sharing options...
hatchsub Posted March 18, 2008 Share Posted March 18, 2008 Is there any reason why you wouldnt want to run the stock hitachi's? I know they have a bad rap but they were made for that manifold. Quote Link to comment Share on other sites More sharing options...
The Beast I Drive Posted March 18, 2008 Share Posted March 18, 2008 dual Holley glass bowl carbs, they were used on late 50's early 60's Ford vehicles, they are single barrel and they look so sweeeeeet! not to mention simplicity, and I see them used in pairs or in 3s on straight sixxes and they look bad asss Quote Link to comment Share on other sites More sharing options...
moosens Posted March 18, 2008 Author Share Posted March 18, 2008 Is there any reason why you wouldnt want to run the stock hitachi's? I know they have a bad rap but they were made for that manifold. Sure...there's a reason. dual Holley glass bowl carbs, sounds cool. That's sort of half of the idea. Make something vintage that resembles a vintage sports car from Europe,etc. Quote Link to comment Share on other sites More sharing options...
mudman Posted March 18, 2008 Share Posted March 18, 2008 I'm running just a simple 66 chevy carb on my Ea71. I bought the carb for simplicity. I was told that some subaru engines have 4 barrel holleys on them. One of the older guys at work says that back in the 50's and 60's, they would always make adapter plates for different carbs on their cars. He tells me that if you can fit it on with no leaks, and tune it right, it will run. I see no problem with dual carbs as long as you make an adapter plate to fit. I know that the on my ea71, the 66 chevy carb is rated at about 175 CFM, and those Weber 32/36's that the guys use so much must be about 300 cfm. If you google subaru aircraft, you can find some info on different carb set ups. Those guys in the airplanes do not want a Hitachi carb, I can't imagine why? Quote Link to comment Share on other sites More sharing options...
Scott in Bellingham Posted March 18, 2008 Share Posted March 18, 2008 make an adapter plate to fit. if you need help with some adapters I can cast them out of Alloy if you send me a wood pattern Quote Link to comment Share on other sites More sharing options...
The Beast I Drive Posted March 18, 2008 Share Posted March 18, 2008 Sure...there's a reason. sounds cool. That's sort of half of the idea. Make something vintage that resembles a vintage sports car from Europe,etc. A pair of European side draft carbs, like from an old Ferrari or or something would be pretty cool, pretty sure you would have to make a custom manifold to make it work right though :-p Quote Link to comment Share on other sites More sharing options...
joostvdw Posted March 18, 2008 Share Posted March 18, 2008 I once saw a pic flying by here of an older yellow roo (don't know which type) with slicks, roll cage and a compressor with dual carbs that thing rocked Quote Link to comment Share on other sites More sharing options...
bigjim5551212 Posted March 18, 2008 Share Posted March 18, 2008 I think you could put 2 one barrels on a Subaru and it would NOT be overkill. If you look at the Volkswagen applications, there is kits for 2 - 34 ICT Weber Carbs. They are not too big, similar in operation to the DGV and relatively inexpensive. things to consider Linkage Manifolds Vacuum fittings This setup has one drawback and that is that the 34 ICT does not have a choke plate. I think this is a minor issue. The dual 34 ICT would be a lot more efficient because there would not be an issue of fuel falling out of suspension. Also, the carburetors are pointing the right way for the float bowls to work properly. When you put a DGV series on the Sube, the float bowl is not correct. This is the same problem VW buses have when they put a downdraft Weber on. Quote Link to comment Share on other sites More sharing options...
moosens Posted March 19, 2008 Author Share Posted March 19, 2008 Thanks very much for your input,guys. Although I can't do any machining right now I do expect to be in a new home soon and have a Bridgeport miller set. But I would gladly send work out and thanks Scott,for offering. One setup I'll do perfectly "stock" as the USA really never saw a dual carb Subaru through a showroom. The other d/c intake I want to have some fun with and make something that older car enthusiasts will appreciate and maybe cause them to repsect the little old Subaru more. And of course a little preformance won't hurt. These days I often work with prepreg graphite sheet that I'm making linkage pieces with a little at a time. A couple of plys,a little time = nice ultralight,ultrastrong pieces to make linkage from. This project is a long way off,I'm sure but not entirely over the horizon. Quote Link to comment Share on other sites More sharing options...
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