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Hello everyone. I'm getting ready to swap over a 2001 b18b1 OBD2 engine from a a 4 door auto over to my 1994 2 door manual Integra shell and need to know if I am missing anything or what kind of problems I might run into. I know I'm going to need a obd2 to obd1 conversion harness in order to plug into the ecu on my 94, but is that all I need for the engine to run properly or will I have problems because the donor engine came from an auto car? What all will I need to convert the auto b18b1 motor to my y80 transmission? When I pull the motor I plan to put in a new clutch, pressure plate and bearing set, is this going to mate up directly to the 01 B18b1 engine, aside from maybe a new gasket? So far from what I've read I shouldn't have any problems as far as the ecu but I want to make sure that I have everything I need in order for the swap to go smooth. The engine that I am swapping over has I/H/E.... if that complicates anything, please let me know. Worst case scenario I will have to get the car tuned as I see it. Thanks for any advice you might offer.
Over 300,000 mi. on this baby. I'd like to build this block for boost or do lsvtec, haven't decided yet.
Last edited by speedbump79; Aug 14, 2017 at 06:59 PM.
Reason: adding pictures
I guess The OBD2 wiring from the engine should hook right into the plugs at the shock towers. From what I read Honda made the system backward compatible, another reason to love Honda! Anybody have any other input that might be useful? Sounds to me like it's a pretty easy swap, just don't want to have any surprises mid swap. Thanks!
Picked up my donor car tonight and drove her home believe it or not, drives perfect....lol. Can't wait to swap everything over to my 94. Looks like I will be using the dizzy and alternator from my car to run on this engine. Will I be able to run the injectors on this engine or will the wiring be different? If anything I guess I can use the obd1 injectors in this engine.
Engine feels way more responsive and sonds great!
You can reuse the entire OBD2 swap (including engine wire harness) but retain the existing OBD1 P75 ecu. While the (OBD2) engine is out, replace the clutch, pilot bearing, timing belt, etc. Much easier because you have all the room in the world to work on it.
You can reuse the entire OBD2 swap (including engine wire harness) but retain the existing OBD1 P75 ecu. While the (OBD2) engine is out, replace the clutch, pilot bearing, timing belt, etc. Much easier because you have all the room in the world to work on it.
Yes, I'll go ahead and change out timing belt, water pump/tensioner while it's out. The guy who sold me the car said it was done when they had the head work done around 3 thousand miles ago but couldn't produces receipts, however, he did have receipts for the head job. He told me the bottom end was not touched and it has 160,000 on it. I don't know why head work was done in the first place? As far as the swap go's, everything looks pretty strait forward and oh yeah, I do plan to put in New clutch and bearings. I'm thinking of ordering the Exedy Stage 1 clutch kit, is this a good kit?
If you're not planning to do major upgrades (engine mods), an Exedy clutch will be fine. Don't forget to replace the rear main seal behind the flywheel. It's a cheap part but a PITA to replace later on if the existing one starts to leak.
I would also do a valve lash adjustment if I were you. Hard to tell the competency level of whoever worked on it when the head was removed.
Hey so im new to this site but I’m doing the same thing as speedbump says in the post. I have a 95 ls integra and just bought an obd2 motor from a 96 ls. What exactly has to be done for the obd2 motor to run right in the obd1 car?
Originally Posted by NVturbo
You can reuse the entire OBD2 swap (including engine wire harness) but retain the existing OBD1 P75 ecu. While the (OBD2) engine is out, replace the clutch, pilot bearing, timing belt, etc. Much easier because you have all the room in the world to work on it.
You don't have to do anything but swap it right over. You will have to use the alternator and starter from the old engine because the plugs are different. I can't remember but I do think there was one plug left off because there was no spot for it on the tower plugs coming from the car, has something to do with emissions. I also had to hard wire a blue wire from the dizzy to a spare wire in the right side tower that was unused in order to get the speedo to work. Other than that, everything goes pretty smooth. My car runs great since the swap. Go ahead and replace as much stuff on the engine while it's out, gaskets, main seal, clutch and bearing, water pump, etc. etc.
So I don’t have to use the dizzy from the old engine? Also what about the ecu? Will the obd1 ecu run the obd2 engine no problem?
QUOTE=speedbump79;51494428]You don't have to do anything but swap it right over. You will have to use the alternator and starter from the old engine because the plugs are different. I can't remember but I do think there was one plug left off because there was no spot for it on the tower plugs coming from the car, has something to do with emissions. I also had to hard wire a blue wire from the dizzy to a spare wire in the right side tower that was unused in order to get the speedo to work. Other than that, everything goes pretty smooth. My car runs great since the swap. Go ahead and replace as much stuff on the engine while it's out, gaskets, main seal, clutch and bearing, water pump, etc. etc.[/QUOTE]
So I don’t have to use the dizzy from the old engine? Also what about the ecu? Will the obd1 ecu run the obd2 engine no problem?
QUOTE=speedbump79;51494428]You don't have to do anything but swap it right over. You will have to use the alternator and starter from the old engine because the plugs are different. I can't remember but I do think there was one plug left off because there was no spot for it on the tower plugs coming from the car, has something to do with emissions. I also had to hard wire a blue wire from the dizzy to a spare wire in the right side tower that was unused in order to get the speedo to work. Other than that, everything goes pretty smooth. My car runs great since the swap. Go ahead and replace as much stuff on the engine while it's out, gaskets, main seal, clutch and bearing, water pump, etc. etc.
[/QUOTE]
The distributor from the obd2 engine should mate right up, I didnt have to use the obd1 distributor. You will have to splice into the solid blue wire coming from the distributor plug and route it over to the driver side tower and connect it to a bluw wire that is not used in the obd1 car. The wire has a cap over it and is tied up out of the way by the connectors on the strut tower, might have to dig around for it. Yes the obd2 engine will work with your obd1 ecu. Honda made the engine backwards compatible.
Know Of any photo diagrams or videos or anything like that? Lol I don’t wanna screw and cut the wrong wires or anything like that. Sorry to ask so many questions like I said I’ve never done an engine swap before and I’m kinda on my own
The distributor from the obd2 engine should mate right up, I didnt have to use the obd1 distributor. You will have to splice into the solid blue wire coming from the distributor plug and route it over to the driver side tower and connect it to a bluw wire that is not used in the obd1 car. The wire has a cap over it and is tied up out of the way by the connectors on the strut tower, might have to dig around for it. Yes the obd2 engine will work with your obd1 ecu. Honda made the engine backwards compatible.[/QUOTE]
OBD2 Engine swap into OBD1 Shell HELP?
