Snowman Posted September 3, 2003 Share Posted September 3, 2003 In order to swap a complete SPFI engine into a car that currently has a carbureted engine in it, what else needs to be switched? Stuff I can think of: -ECU-where is it located? -engine control wiring harness -fuel pump and its wiring -Y pipe w/oxygen sensor There has to be more than this. Oh yeah, and if I go through with this, I'm gonna do T-belts, oil pump seals, maybe water pump, cam seals, crank seals, cam block seals, valve cover seals, oil pan seal, clean the lifters, and make everything nice 'n shiny. Quote Link to comment Share on other sites More sharing options...
MorganM Posted September 3, 2003 Share Posted September 3, 2003 I missed the whole "entire engine" thing Quote Link to comment Share on other sites More sharing options...
Snowman Posted September 3, 2003 Author Share Posted September 3, 2003 I want to keep the ENTIRE ENGINE as one piece during the swap. Engine, intake manifold, throttle body, sensors, etc. come out of one car and go into another. No removal of manifold or anything like that. I have to swap everything because the Japanese market engine that is in the car right now can't pass emissions. Quote Link to comment Share on other sites More sharing options...
baccaruda Posted September 4, 2003 Share Posted September 4, 2003 some fuel injected cars have more actual fuel lines than carbureted same-model cars.. i don't know if this is the case with a subaru though. Quote Link to comment Share on other sites More sharing options...
MorganM Posted September 4, 2003 Share Posted September 4, 2003 There is atleast three on my SPFI. Send, Return and Vent I belive are their functions. All 3 run from engine bay to gastank. The vent goes all the way up the neck of the fill tube also. Quote Link to comment Share on other sites More sharing options...
Snowman Posted September 4, 2003 Author Share Posted September 4, 2003 Yeah, fuel lines are a concern. I do have a complete parts car in addition to the car that the engine is coming out of, so I should be able to just take the lines off of there if mine doesn't have them. If I can use my existing fuel lines, will they handle the pressure? There's a big difference between carb and spfi fuel pressure. I think carb cars run less than 5 psi, whereas the spfi cars run 53 psi. Quote Link to comment Share on other sites More sharing options...
Skip Posted September 4, 2003 Share Posted September 4, 2003 Snow, sounds like you have a good handle on this, hope you give it 'ell As for your fuel line question, we are only at about 35 psi **but you are correct the fuel lines should be changed from the pump to the injector atleat (note: somebody has mounted the SPFI pump inline under the hood and let the carb pump feed it (think it is Noah with his CIS conversion) The more effiecant SPFI will use less gas than the carb so fuel delivery volumes should not be an issue) The return line is a minmal pressure line so it should be fine. ** I say this because normal "fuel line" is rated to about 40 psi and costs pennies per foot. fuel injection line rated for 100 psi is dollars per foot (at NAPA any how, just tried to buy some, put normal fuel line on my turbo wagon and it shows no signs of swelling or problems) You did ask some questions -ECU-where is it located? -engine control wiring harness -fuel pump and its wiring -Y pipe w/oxygen sensor The ECU is under the steering col. The main harness goes in the driverside of the bulkhead. Fuel pump - covered Y pipe and 02 sensor. the 02 sensor is essential but a bung for it could be welded into your existing "Y" if ness. Good luck, I have complemplated this swap (minus the lump) into one of my Brats Quote Link to comment Share on other sites More sharing options...
Snowman Posted September 4, 2003 Author Share Posted September 4, 2003 Thanks! I can't wait to do this! Probably the earliest possible time it can be done is during Christmas break, but it probably will have to wait longer that that. Quote Link to comment Share on other sites More sharing options...
Snowman Posted September 5, 2003 Author Share Posted September 5, 2003 I forgot some other stuff that I wanted to check on before doing this. The spfi engine is coming out of a car with an automatic and going into one with a manual tranny, which raises two issues. 1. Do I just bolt on the flywheel and clutch assembly from the MT car, or does more have to be done? 2. Do I need to change the distributor? If so, will the one from the carbed motor work, or should I take the one off of my MT spfi parts car? Or can I just leave that one in there?I haven't checked to see if the spfi distys have any electronic gismos in them that the carb distys don't. Quote Link to comment Share on other sites More sharing options...
Skip Posted September 5, 2003 Share Posted September 5, 2003 Yes, you will need the flywheel and clutch set up yes you will need the SPFI distributor You will also need to tell the ECU that it is now a manual vs automatic tranny. This is done with a jumper on the pin in connector. Since you have some time, my suggestion is to start shopping Ebay or where ever for a FSM (Factory Service Manual) It will answer many questions that you may have concerning this endeavor. Best of luck Quote Link to comment Share on other sites More sharing options...
bcmenten Posted December 10, 2003 Share Posted December 10, 2003 how did you change over the wiring. I'm doing this swap right now and have everything done except the wiring, so any advice???? Please help Quote Link to comment Share on other sites More sharing options...
bcmenten Posted December 15, 2003 Share Posted December 15, 2003 I know I am new, but please help me with the wiring for this changeover from carb to spfi.....any help would be appreciated so very much. Quote Link to comment Share on other sites More sharing options...
calebz Posted December 15, 2003 Share Posted December 15, 2003 You will also need to tell the ECU that it is now a manual vs automatic tranny. This is done with a jumper on the pin in connector. Really? Is it different for a turbo car? When I did my auto to manual swap I didn't do anything like that. Could you elucidate further on thy why's of the matter and possible consequences of not doing it? I didn't see anything in my FSM that would lead me to believe this was an issue. Quote Link to comment Share on other sites More sharing options...
MilesFox Posted December 15, 2003 Share Posted December 15, 2003 dont forget to swap over the airbox on the carb fuel system: replace the rear filter and pump with the spfi pump Replace the filter under the hood with the canister fuel injection type filter.. the line from the filter will connect to the bottom nipple on the spfi throttle body. the return line will go to the top nipple on the throttle body. the vent line from the top of the carb fuel filter will go to a vac steel line that sticks up at a 45 drg angle on the back of the manifold. this line goes to the charcoal canister ststem. leave the canister connected to the motor when you swap my 2 cants... trashwagon5 has the canister fuel filter under the hood, but with a carb Quote Link to comment Share on other sites More sharing options...
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