seth3030 Posted November 21, 2004 Share Posted November 21, 2004 i have a single barrel carber weber card and i want to switch that to the hitachi carb i have a 1982 gl wagon 1800. so what do i need to do? my brother says i need a new intake manifold. Quote Link to comment Share on other sites More sharing options...
BobBrumby Posted November 21, 2004 Share Posted November 21, 2004 you dont need a in inlet manifold if you can find a redline adapter plate. remember the ea81 have two different carb base sizes, i think you would have the big mouth one. Quote Link to comment Share on other sites More sharing options...
seth3030 Posted November 21, 2004 Author Share Posted November 21, 2004 you dont need a in inlet manifold if you can find a redline adapter plate. remember the ea81 have two different carb base sizes, i think you would have the big mouth one. where would i go about getting a redline adapter plate? and does that just make it so it fits without having to get the whole intake manifold? also would i need a new computer for the carb? Quote Link to comment Share on other sites More sharing options...
CIS Subaru Posted November 22, 2004 Share Posted November 22, 2004 BobBrumby, Did the Australian EA81s ever come with the C/W carb? I thought that was a U.S. model only thing. Seth, you will need to use a different intake manifold. I've never heard of anyone selling an adapter to put a Hitachi carb on the C/W manifold. Redline doesn't even sell an adapter for putting a Weber carb onto that manifold. If you use a Hitachi carb that used a computer (probably from a 2wd model), then you will need to swap to that computer in order to use that carb. The wiring is different also, so I would not recommend this route. Most 4wd EA81 powered Subarus that used Hitachi carbs (in the U.S.A.), did not have a computer. I would use one of these carbs (with matching intake manifold) to replace your C/W carb. It would also be possible to use an EA82 carbutetor and manifold, but that swap is not nearly so straightforward. Quote Link to comment Share on other sites More sharing options...
BobBrumby Posted November 22, 2004 Share Posted November 22, 2004 cis subaru no i dont beleive its a carter webber as its got hitachi written all over it and is 2bbl but it did have a smaller base than the adapter plate i got with the carb. Luckily i had a "big mouth" intake that fitted the adapter plate on a spare engine, even if it did have a carb stud tread stripped Quote Link to comment Share on other sites More sharing options...
Mudboat Posted November 23, 2004 Share Posted November 23, 2004 I just did this same swap over last week. I had to change the intake which I paid $40 from a guy who has spare parts all over. I also bought a used Hitachi for $50 and put a rebuild kit from NAPA in it before installing. Took about 3-1/2 hours and $140 in parts and gaskets... Quote Link to comment Share on other sites More sharing options...
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