dragonwingsubaru Posted February 28, 2005 Share Posted February 28, 2005 i was in autozone and noticed those adapter plate to make a 4bbl fit a 2bbl intake and vise-versa and it looked like the 2bbl side would fit the soob intake, has anyone ever tried this. dont know if it would even work at all. i gotta holley 650cfm sitting around here somewheres that i could put on if someone thinks this could work. basically this is just an idea im throwing out there, if someone has mentioned this b4 i am sorry for repeating it, but im just kinda curious since this hitachi i got on it now sucks in my opinion Link to comment Share on other sites More sharing options...
calebz Posted February 28, 2005 Share Posted February 28, 2005 The hitachi, if in good tune, is not the evil that a lot of people make it out to be. A 650 on a mildly tuned 350 (5.7L) is a good choice. I would teld to think a 650 on a 1.8L soob would be a bit of an overkill situation. Link to comment Share on other sites More sharing options...
Snowman Posted February 28, 2005 Share Posted February 28, 2005 That's WAAAAAY too big. I highly doubt it would work out very well. Most people that upgrade carbs on soobies go with the Weber 32/36 DGEV, some have run the 38/38. Those carbs are about all you need/can handle with a stock engine. I think even the guys with 150 hp EA81's are running the 32/36, but I'm not positive about that. Link to comment Share on other sites More sharing options...
NorthWet Posted February 28, 2005 Share Posted February 28, 2005 ... A 650 on a mildly tuned 350 (5.7L) is a good choice. I would teld to think a 650 on a 1.8L soob would be a bit of an overkill situation. For several years, I ran a Holly 390 cfm 4bbl on my L20B Datsun engine. It ran beautifully until the carb died due to vibration. Not a cheap carb, though. Link to comment Share on other sites More sharing options...
mcbrat Posted February 28, 2005 Share Posted February 28, 2005 the adapter you speak of won't fit the hitachi intake, but comes *close* to mating up with the weber adapter. would have to be modified slightly. Link to comment Share on other sites More sharing options...
oddcomp Posted February 28, 2005 Share Posted February 28, 2005 yeal like northwet it had a 390 on a small truck a sr5 toyota 2wd witht eh 20r motor it worked well considering i could get nice tire chirp at all 5 shifts i would stay away from a 650 on that small of motor and i suspect a propperly jetted 390 with a fairly stiff vacum secondary spring would work fine Link to comment Share on other sites More sharing options...
NorthWet Posted February 28, 2005 Share Posted February 28, 2005 Realistically, the Holley 390cfm didn't give much, if any, more oomph than the 2bbl off of an '80 Nissan 2liter. The Holley looked cool and sounded cool when the secondaries opened, but kept having things vibrate off... like a primary aux venturi! I would stick with a good condition 2bbl or EFI. Link to comment Share on other sites More sharing options...
85Sub4WD Posted February 28, 2005 Share Posted February 28, 2005 For several years, I ran a Holly 390 cfm 4bbl on my L20B Datsun engine. It ran beautifully until the carb died due to vibration. Not a cheap carb, though. What car was that? my mom used to have a 1972 Datsun 510 wagon (L16 engine) - nice car - blew a head gasket; my dad started, but never finished replacing it! Realistically speaking - the 1.8L Soob engine cannot handle a 4-barrel carb. - the L20B engine is completely different from the EA81/EA82 and the L series can handle a LOT of power - not that the EA engines can't - but there is a definate difference in displacement and design - the L's have a 5 main bearing bottom end. Link to comment Share on other sites More sharing options...
Nug Posted February 28, 2005 Share Posted February 28, 2005 If you had 10 psi of boost running through that carb and into your engine, it would work out well. Or if you were twisting it up to 10,000 rpm. It would look cool, though. Link to comment Share on other sites More sharing options...
dragonwingsubaru Posted February 28, 2005 Author Share Posted February 28, 2005 well like i had said guys i was just kinda throwing the idea out there kinda wondering if someone had tried it b4. from the response so far though im gonna assume that other than looks it would prob be a big waste of time. i could be wrong on it being a 650 but i would say at least it might be a 550.for right now i cant even seem to figure out where i put the thing at though lol Link to comment Share on other sites More sharing options...
85Sub4WD Posted February 28, 2005 Share Posted February 28, 2005 If you were to put a 4-barrel carb on, I would use an MPFI intake and heads, you have one port per cylinder, and one barrel per cylinder (MPFI manifolds also have better flow volume - I do see an advantage there, though I still think a 4-barrel is to big would require a LOT of mods tho ... Link to comment Share on other sites More sharing options...
oddcomp Posted February 28, 2005 Share Posted February 28, 2005 hmm.. just like most people thought you could not put distributorless ignition on a ea82 ... all i can totally suggest is give it a try.. math and numbers regarding how some kind of carbs will or won't work are good things to go by.. but.. somethings do work that should never work.. take a look at mr bumblebee... he should not be able to fly... soo eh if it was me i would try it.. at least you would have proof to tell the next person why it did not work instead of why it should not work Link to comment Share on other sites More sharing options...
Frank B Posted February 28, 2005 Share Posted February 28, 2005 I had seen on one of the many aircraft sites that offer subaru engine parts, a 4 barrel intake. I'll try to find it. I do agree with using MPFI heads and intake, and some custom ground cams. the engine will definatly need more air pumping thru it to use that size carb. Dual exhaust as well. Link to comment Share on other sites More sharing options...
85Sub4WD Posted February 28, 2005 Share Posted February 28, 2005 The EA82 turbo system and heads use a distribuitor (well, crank angle sensor) - in fact the stock one for carbed cars will bolt on. It's the EJ22 cars that don't have distys. Link to comment Share on other sites More sharing options...
Frank B Posted February 28, 2005 Share Posted February 28, 2005 Here's a thought, I had an 83 or 84 , Mazda RX7 donor car that had a 4 barrel on it stock. I can't remember if it was a hitachi or nikki. I believe it was the 12B rotary. It may be smaller than the holley 390 and still give more power than the weber????? Link to comment Share on other sites More sharing options...
Roobaflu Posted February 28, 2005 Share Posted February 28, 2005 Here's a thought, I had an 83 or 84 , Mazda RX7 donor car that had a 4 barrel on it stock. I can't remember if it was a hitachi or nikki. I believe it was the 12B rotary. It may be smaller than the holley 390 and still give more power than the weber????? sure its not a 12A? 12A should be carbed with a Nikki SHOULD be about 300 cfm 13B would be fuel injected the 12B is confusing, the single distributor 12A was originally supposed to be called a 12B but they decided to keep the 12A name, so technically I guess a 12B is actually a single distributor 12A (earlier 12A's had twin dizzies) Link to comment Share on other sites More sharing options...
Frank B Posted March 1, 2005 Share Posted March 1, 2005 sure its not a 12A?12A should be carbed with a Nikki SHOULD be about 300 cfm 13B would be fuel injected the 12B is confusing, the single distributor 12A was originally supposed to be called a 12B but they decided to keep the 12A name, so technically I guess a 12B is actually a single distributor 12A (earlier 12A's had twin dizzies) I'm trying to remember, I didn't have it long. But I believe it had one distributor and a funky twin rotor and an odd cap. either way, it was a four barrel with a ton of vaccum lines! Link to comment Share on other sites More sharing options...
Roobaflu Posted March 1, 2005 Share Posted March 1, 2005 I'm trying to remember, I didn't have it long. But I believe it had one distributor and a funky twin rotor and an odd cap.either way, it was a four barrel with a ton of vaccum lines! thats a 12a Nikki carb Link to comment Share on other sites More sharing options...
JWX Posted March 1, 2005 Share Posted March 1, 2005 I don't think all 13Bs were FI Link to comment Share on other sites More sharing options...
dragonwingsubaru Posted March 1, 2005 Author Share Posted March 1, 2005 well someone mentioned turbo earlier, im really not interested in running a turbo on my motor though i would prefer to keep it n/a. basically my idea on the 4bbl was to push a few more ponies outta my motor. looks like i may just wait till i can get my hi-pro buildup of my other motor done to attempt this. anyone think it would help with the 4bbl for running a NOS system though? Link to comment Share on other sites More sharing options...
Nug Posted March 1, 2005 Share Posted March 1, 2005 They got old VWs to run with twin Weber 48mm IDA's. Anything is possible. Link to comment Share on other sites More sharing options...
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