desertsubaru Posted August 12, 2004 Share Posted August 12, 2004 I searched but could not find any info on a intake swap for my 83 ea81. Is there any fuel injection that would fit that engine? Link to comment Share on other sites More sharing options...
Humble Nuto 53 Posted August 12, 2004 Share Posted August 12, 2004 single port fuel injection manifold (spfi late 87-94 or so) will bolt on to your ea81. wiring is another issue. a few guys here have done it Link to comment Share on other sites More sharing options...
GeneralDisorder Posted August 12, 2004 Share Posted August 12, 2004 SPFI was availible from 86-94. Wiring is one issue. You also have to switch to the SPFI distributor (assuming you are running the Subaru computer and harness....), which requires that the distributor casing be modified slightly (one mounting tab removed, and the adjustment slot on the other enlarged) and the drive gear from the EA81 distributor pinned on (which requires the correct hole be drilled in the shaft). Many EA81 exhaust headers did not include the O2 sensor which the SPFI requires to work correctly. This will have to be added (hole drilled - threaded adaptor welded in), or an O2 equipped header located (from a feedback Hitachi EA81). The nasty wireing (and potentially the disty swap as well) can be partially avoided by using the SPFI system, and switching to a megasquirt system for the fuel managment. This also avoids using the stock SPFI MAF sensor, as the megasquirt is equipped with a MAP sensor instead. The system can be setup to use either the EA81 disty, or the EA82 disty, but the EA82 disty is prefered. If you can find one, an EA81T disty will also do the job, but doesn't require any modifications like a regular EA82 one would. GD Link to comment Share on other sites More sharing options...
MilesFox Posted August 13, 2004 Share Posted August 13, 2004 alsoo with running the ea82 spfi manifold and distributor, tou will have to eliminate the egr and block it off to clear the bellhousing. the distributor is gonna fight for space with teh thermostat housing, you willhave to cut off one of the mounting tabs to the disy, and take the part where the screw goes thru and mount it upside down, and then mount the disty 180 off and wire to the cap 180 off from it so the rotor and wires are true to the firing order. Link to comment Share on other sites More sharing options...
myossfeece Posted August 13, 2004 Share Posted August 13, 2004 and as far as the o2 sensor you could just run a stock ea82 "y" pipe, It will still bolt up the same but will hang down say 3/4 of an inch lower than the stock ea81 pipe. that should solve the o2 prob. be sure the ea82 pipe is off a spfi as a carbbed ea82 pipe will obviously put you in the same boat your in now. Also be sure to swap to an ea82 spfi fuel pump to get your pressure. make sure to get the coil bracket with ignition amplifier to work with the optical disty. Link to comment Share on other sites More sharing options...
GeneralDisorder Posted August 13, 2004 Share Posted August 13, 2004 As you can see - there is a LOT to consider. Hehe GD Link to comment Share on other sites More sharing options...
desertsubaru Posted August 13, 2004 Author Share Posted August 13, 2004 thanks guys! I know where there is a 90 wagon in a local pull your own j/y that will sell me everything for 100$. Is that a good deal? Allso will it give more H.P and tourqe? My 86 gl wagon is ready to die (ofcourse i said that 10.000 miles ago) I got a great deal on a rebuilt ea81 out of 83 wagon 300$ with 5000 miles on it but it has a carter weber (wich was allso rebuilt) but i know they are not to good of a carb so i would like to go F.I becase the carb on my ea82 is about shot to so if it can be done i can do most of the work on my bench untill i ad computer and if thats a good deal (100$) i will go for it. (I know i should have found another EA82 but this deal i got on EA81 could not be passed up!!!!!) Link to comment Share on other sites More sharing options...
oddcomp Posted August 13, 2004 Share Posted August 13, 2004 you could always just get rid of the distributor and not have to deal with it Link to comment Share on other sites More sharing options...
GeneralDisorder Posted August 13, 2004 Share Posted August 13, 2004 The EA81 is far superior to the EA82 in my opinion. I think you got a decent deal. As for HP - no. Won't change appreciably. Torque will be better on the low end, but your high end is not limited by the fuel system. Your limit is the cam, and bad flowing heads. $100 for everything you needs sounds more than reasonable to me. I say go for it. It's no small amount of work, but when you are done you'll have the best of both worlds - the bulletproof FI, and the bulletproof pushrod engine. Now that's a winning combo. GD Link to comment Share on other sites More sharing options...
myossfeece Posted August 13, 2004 Share Posted August 13, 2004 with all the work involved, and having a complete car for parts, why not consider using the WHOLE ea82 motor if its good, and get spfi AND more power. the ea82 motor will fit in the engie bay and against the tranny. i would say that if the donor car was junked over something stupid like a broken timing belt, consider the whole motor to swap. the adantages would be easier to build up, more power, and you can replace with unmodified stock replacement parts Link to comment Share on other sites More sharing options...
GeneralDisorder Posted August 13, 2004 Share Posted August 13, 2004 You don't understand - He's putting a rebuilt EA81 into his '86 cause the EA82 is dead. GD Link to comment Share on other sites More sharing options...
MilesFox Posted August 13, 2004 Share Posted August 13, 2004 make the spfi system standalone, so that it will swap with the engine. keep the carter weber and put it on the ea82 out of the donor car for a later project, a backup motor, or put it in the 86 and have the spfi ea81 for another project(like a big set of legos!) Link to comment Share on other sites More sharing options...
desertsubaru Posted August 13, 2004 Author Share Posted August 13, 2004 When i take the EA82 out i will be rebuilding it with hi po parts or at least the best i can get anyway. The EA 82 still runs strong but has a lot of problems, t belts main front oil seal rear oil seal dripping REALLY LOUD lifters most of the time! OIl pump seal,1 year with no oil change,bad carb,and was heated way to many times because of bad rad(yes will be putting new one in for EA81) The EA81 not only rebuilt but they went the extra mile when they did it.New vacume towers, new vacume lines, new pullys on for every v belt,rebuilt carb ,new clutch and preasure plate( yes i know the disk wont fit) even a referbed flywheel.so i checked to see what it would cost to redo EA82 stock and with all the problems it has the 300$ EA81 looked like agreat deal( out of 83 wagon that some lady just had rebuilt then 5000 miles later she got hit in the tail) even found the paper work for the 10.000 mile warenty on engine and how many miles ago it was redone. In my part of A.Z to find any running sube engine in j/y is a treasure most got craked heads and blocks due to the heat.the 90 wagon is in the J/Y for that reason alone. (SAD nice car) im going to run the EA82 untill winter then swap when its cool enough here to do it so i have lots of time to get EA81 ready! allso found the rebuild price list on the EA81 allmost 2000$ for every thing done so 300$ is a steal. Link to comment Share on other sites More sharing options...
Recommended Posts
Please sign in to comment
You will be able to leave a comment after signing in
Sign In Now