Svengouli7 Posted February 22, 2010 Share Posted February 22, 2010 Howdy all- car I am working on is a 1991 automatic n/a legacy.. Is there anyone on here that has successfully run fuel injectors from a standard trans motor (black top) in an automatic (grey top) early 90-91 legacy? Have you had issues with perfromance or economy? A search found mention of how this should work, or don't do it since computers may be different.. but I didn't see any mention of someone having tried it. My situation is that I had 2 bad injectors, and managed to drop one of the 2 good ones on my garage floor busting the plastic cap. I have 3 black topped injectors handy, and 3 red topped (later year- 1993-95?) at hand. The red topped injectors sit in the different/longer rail assembly, while the black and grey both sit in the shorter rail I've been playing around trying to get this all straight- currently have cylinders 1,3 and 2 all running ok with black topped inj's with 4 having the one good grey. I have been having some leak down issues due to flooding and was going to replace the o rings, but want to know if I should even bother persuing this or try to find a matched set of grey topped injectors like the car came with. Thanks Link to comment Share on other sites More sharing options...
Legacy777 Posted February 22, 2010 Share Posted February 22, 2010 So are you looking to use the gray and black top injectors together? The fuel rails are different in how the injector seats, so you have to match the rails to the injector. I'd strongly recommend just trying to find some of the gray injectors. I've probably got my old ones out of my 90 Legacy you could have for a song and dance if you wanted. I'll try and remember to look tonight to see if I still have them. If I do, and you want them, let me know. Link to comment Share on other sites More sharing options...
GeneralDisorder Posted February 22, 2010 Share Posted February 22, 2010 rockauto has the grey top's for $32.79 each. Maybe more than you were looking to spend but thought I would mention it in case you were considering a new set. GD Link to comment Share on other sites More sharing options...
Svengouli7 Posted February 22, 2010 Author Share Posted February 22, 2010 To my untrained and imaginitive eye the rails for both the black and grey appear the same, in stark contrast to the rail holders for the red topped injectors... but I am getting tired of fooling with this. The black and grey ones sit in the holding cups at a 45* to the pistons, the red sit in line if that makes sense.. Josh, if you have that set available I would be interested. Shoot me a PM on what you think would be fair, I can do paypal or snail mail money if you like... They were working when pulled? Do you mind checking resistance on them? Rick- thanks for pointing that out- far far cheaper than the $130 at 1stsubaru, and less sketchy than ebay. Its a viable option. The yards out this way have a few red jobbers, but no black or grey that I've found yet. Caleb Link to comment Share on other sites More sharing options...
Legacy777 Posted February 22, 2010 Share Posted February 22, 2010 Yeah, they were working when I pulled them. I put in a set of balanced & flow tested red tops. That's when I found out the red tops flow a little more, and I decided to swap from the 90 ECU to the 92 ECU. I'll make myself a reminder and look for them this evening and let you know. Link to comment Share on other sites More sharing options...
Legacy777 Posted February 23, 2010 Share Posted February 23, 2010 Found the injectors. They're a little rough off from what I remember. One of them the plastic tip is cracked, and the others, the top part is cracked/chipped. Three of them would probably be fine to use. Tested all the injectors resistances, and they all were at 11.9 ohms. Here's some pictures http://www.main.experiencetherave.com/subaru/images/legacyinjectors/ You can have them for the cost of shipping. If you're interested, let me know. Link to comment Share on other sites More sharing options...
Gloyale Posted February 23, 2010 Share Posted February 23, 2010 you can use the whole intake from a red top by just swapping your wiring onto the newer intake. othwise it's bolt on. Link to comment Share on other sites More sharing options...
GeneralDisorder Posted February 23, 2010 Share Posted February 23, 2010 you can use the whole intake from a red top by just swapping your wiring onto the newer intake. othwise it's bolt on. Wouldn't you also have to swap the ECU and the MAF? Maybe other things? GD Link to comment Share on other sites More sharing options...
Legacy777 Posted February 24, 2010 Share Posted February 24, 2010 ECU yes. Link to comment Share on other sites More sharing options...
Gloyale Posted February 24, 2010 Share Posted February 24, 2010 Wouldn't you also have to swap the ECU and the MAF? Maybe other things? GD No The injectors run at the same resistance and are very, very close in flow. I've run several "red top" intakes on early Legacies.....just swap over the "grey top" harness to the "red top" intake. Never had any issues, codes, etc... No need to swap ECU or MAF Link to comment Share on other sites More sharing options...
Legacy777 Posted February 25, 2010 Share Posted February 25, 2010 No The injectors run at the same resistance and are very, very close in flow. I've run several "red top" intakes on early Legacies.....just swap over the "grey top" harness to the "red top" intake. Never had any issues, codes, etc... No need to swap ECU or MAF There is a difference between the gray & red top injectors. It's not enough to keep the car from running, but it doesn't run optimally. The red tops are slightly larger, and if you run them with the 90-91 ECU, your fuel mileage will decrease. I've done this in my Legacy. Then swapped in a 92 ECU, mileage was better, and car was "peppier" since the engine wasn't so rich. Link to comment Share on other sites More sharing options...
Svengouli7 Posted March 2, 2010 Author Share Posted March 2, 2010 The injectors came in the mail today-- thank you Josh! Link to comment Share on other sites More sharing options...
Legacy777 Posted March 2, 2010 Share Posted March 2, 2010 You're welcome. Link to comment Share on other sites More sharing options...
MilesFox Posted March 2, 2010 Share Posted March 2, 2010 i have a partially disassemble intake from a 92 fwd 5spd 2.2 legacy. i think they are red top. i can supply you with all 4 injectors and their fuel rails, if they will work for you. pm me with an offer if you can use them. Link to comment Share on other sites More sharing options...
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