putting a gsr obd2 in my 91 teg, ecu harness didnt come with engine ,can i get a harness from any 94 and up teg ?????. and can i used and ecu harness other than a gsr?????


Modified by wilntegra at 12:15 AM 1/24/2005

 

Can't get a harness from a 94-95 teg bc that's OBD1. 96+ is OBD2 (and technically speaking, 96-99 is OBD2A and 99-01 is OBD2B). If you use a harness that's not from a GSR (i.e. RS/LS/GS) then you'll need to hook up three extra wires for VTEC (and others for the OBD2 system (second O2 sensor)).

Below I have pasted the info directly out the B Series Engine Swap guide (into 2nd gen tegs) from the G2IC website (http://www.g2ic.com. This is your setup, a 1996+ OBD2 GSR engine into a 90-91 teg:

Engine: 1996-up USDM B18C1
Displacement: 1797cc
Compression Ratio: 10.0:1
Hp/Torque: 170hp@7600rpm/128lb-ft@6200
Transmission: Y80 (hydraulic)

This is an OBD-2 engine from 96-up Integra GSRs. This motor is identical to that of the 94-95 GSR, just OBD-2 instead of OBD-1. Mileage on this motor will vary, because it is a US Spec motor and we don’t have to pull our motors at 40,000 miles. Price on this motor will vary as well. Sometimes you can find a deal for about $3000, other times you may pay up to $4000 for one of these motors. Many people prefer to go with the 90-91 JDM B16A not only because it is non-OBD, but because of the lower mileage and cheaper price. These are the only items of concern with this swap:

Wiring Harness-You will need to use your existing B18A1 cream plug wiring harness. It will plug into everything on the motor except for the distributor and injectors. And just like the B17A1 engine, you’ll have to add the 3 wires for VTEC, knock sensor wire, and the second oxygen sensor. Also, the temperature switch on this motor is located on the thermostat housing unlike your B18A1 which is located on the back side of the block, so you will have to cut and extend the two wire plug to reach the thermostat housing. But this is fairly easy. The black plug harness that comes with the OBD-2 B18C1 cannot be used, but can be sold for $100-$125.
Motor Mounts-Use your existing B18A1 mounts. They slightly different than the B18C1 mounts.
Distributor-You can use your B18A distributor but the leg towards the front of the car has to be cut off to allow clearance for the VTEC purge assembly. You will only have two bolts holding your distributor, but that is adequate. You can do this or your other choice is to buy a non-OBD VTEC distributor (PR3). You can find them on the net for as little as $100, but most are priced at about $150. The OBD-2 Distributor that came with the motor cannot be used but can be sold for $150-$200.
Intake Manifold-This is the biggest difference when using this motor. This is the only Honda motor that has the “upside down” intake manifold. It also has secondary butterflies in the dual intake manifold runners. What I recommend doing is getting rid of this manifold and TB entirely and getting the Skunk2 Intake Manifold (pre-modified to fit the P72 Head). ). Because you cannot use the P72 ECU that controls the secondaries in the intake manifold (that only the B18C1 has), this is the best solution. Then use an ITR TB or your LS TB (maybe bored out by RC Engineering). You can use an ITR Intake manifold but it needs to be modified to fit (by a machine shop). Another reason for using the ITR or Skunk2 Intake manifold is for the Intake piping. You can use your stock or 90-91 after market (AEM, Injen, Akimoto, etc.) and it will fit perfectly. If you use the B18C1 manifold, you have to have intake piping custom made to fit. I have heard of people using the B18C1 manifold, but they had the butterflies welded open or something to that effect. Doesn’t sound like a good idea.
Injectors-You will need to use your existing non-OBD B18A1 injectors. The OBD-2 injectors have a different plug on them made for the b1ack OBD-2 harness. Other than that, the injectors are identical.
ECU-This motor will come with an OBD-2 VTEC ECU (P72). You cannot use this ECU with your harness that is inside your vehicle (non-OBD). So sell it and buy a non-OBD VTEC ECU (PR3, PWO). Either one of those ECU’s will run the OBD-2 B18C1 (with Skunk2 Intake Manifold) perfectly with your B18A1 harness.
Transmission- This engine also comes equipped with a hydraulic transmission, which either needs to be swapped out for a short geared cable transmission (J1, S1) or I believe Place Racing makes a hydraulic to cable converter that you can use. But then you are talking about more money. Again you can buy a YS1 short geared transmission, but you will need a clutch assembly from a 92-93 Integra or if the B18C1 motor came with a clutch and flywheel, you can use those.
Clutch-Depending on what transmission you go with (90-91 or 92-up cable transmissions) will determine what clutch you should get. If you get a 91 or older cable transmission you will need a 90-91 Integra clutch assembly. If you go with the 92 up YS1 Cable transmission, you will need a 92 up Integra clutch assembly. Use the matching flywheel with the same clutch.

Below are things that I recommend doing while your motor is out and before you drop your B18C1 in:

Replace the water pump & thermostat (depending on miles)
Replace the timing belt and timing belt tensioner (depending on miles)
Replace Cap, Rotor, and Spark plugs
Adjust valves
Replace valve cover gasket and spark plug seals
Replace fuel filter
Replace PCV valve

HTH -- Kevin