January 21, 201016 yr Before I start... I really wish I could afford a Weber but I can't at the moment And SPFI is a future option, just not right now... Alright, so my old carb (hitachi feedback) took a dump. The carburetor is pretty simple IMO... but mine wasn't worth a rebuild because of shaft play, and I absolutely HATE feedback carburetor systems. I want to unplug the ECU and throw it at a wall as hard as possible So last night I got a hold of another EA81 manifold, and a Hitachi carb that looks pretty much the same as my old one. However the two manifolds are different, so it seems. According to the dude that sold me the carb and manifold, it was on an '81 wagon and was non-feedback. He told me there was no computer, but it sure seems like the sensors on the intakes match pretty close... Here's the questions, what ALL can I remove from the intake to clean up the clutter? I read GD's Hitachi threads, I don't have an AAV and I'm unclear about the removal of metering port vacuum control system... I've read that only a few vacuum lines were necessary to run the non-feedback... Help me in my confusion... It's storming, and I'm craving the mud!
January 22, 201016 yr Hhhmmmm - all Hitachi manifold's that I've seen were pretty much the same - you sure he didn't sell you a carter/weber? Those are quite a bit different...... I should detail how to bypass the metering ports for the Hitachi but I haven't had time. Ultimately I just plugged the majority of them. They don't work properly without the vacuum valve controls that open and close them under specific throttle conditions. I found that it didn't really matter for mileage. When I couldn't get the mileage up to a normal range I put on one of my Weber's and found that it wasn't the carb that was at fault for the mileage - the engine has a low cylinder. Still - it get's about 30 on the freeway. About 24 or 25 in town which is what the Hitachi got as well. So the metering ports don't really seem to make much difference in the end. Saving them isn't worth the trouble - just block both of them. GD
January 22, 201016 yr Author Yeah, it's definitely a Hitachi. My manifold has vacuum ports that the other one I got doesn't have... Maybe it's because mine's a feedback manifold and the other isn't... i don't know. So basically I can remove the metering ports off the manifold if I wanted to? How about those two small black "canisters" on the driver's side that seem to go to those metering ports? Can I remove those too?
January 22, 201016 yr The black canistors are the vacuum valves I spoke of. Remove them and block the manifold and carb body nipples. GD
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