obd2 b18b1 into 89 civic si

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Old Jan 5, 2012 | 06:26 PM
  #1  
Randysi's Avatar
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Default obd2 b18b1 into 89 civic si

Alright I got some questions for the people of Honda-Tech.

My buddy has a 1997 b18b1 for sale with a p75 ecu. As ive searched I found out this was obd2.

Now for the parts I have questions on. (Just wiring harness stuff)
Im on rywire.com looking for Pieces I need.

Im assuming all I am gonna need is:
-OBD0 to OBD2a ECU Conversion Harness
- Add Distributor Adapter OBD0 to OBD2
- Add just 4-wire O2 (LS)
-OBD0 & OBD1 chassis to OBD2 Alternator Adapter

And also some obd1 b series fuel injectors.

Is there gonna be anything else I need for the wiring part of this swap?

Thanks for any help.
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Old Jan 5, 2012 | 06:35 PM
  #2  
crx_si-r's Avatar
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From: NoRthERn Cali
Default Re: obd2 b18b1 into 89 civic si

Originally Posted by Randysi
Alright I got some questions for the people of Honda-Tech.

My buddy has a 1997 b18b1 for sale with a p75 ecu. As ive searched I found out this was obd2.

Now for the parts I have questions on. (Just wiring harness stuff)
Im on rywire.com looking for Pieces I need.

Im assuming all I am gonna need is:
-OBD0 to OBD2a ECU Conversion Harness
- Add Distributor Adapter OBD0 to OBD2
- Add just 4-wire O2 (LS)
-OBD0 & OBD1 chassis to OBD2 Alternator Adapter

And also some obd1 b series fuel injectors.

Is there gonna be anything else I need for the wiring part of this swap?

Thanks for any help.

you dont need to do an obd2a conversion. if you do, you will also need to add in the 2nd o2 sensor. your best bet is to convert to obd1. all you would need is an obd1 LS ECU. you can use the obd2 alternator no problem, same goes for the injectors and distributor.
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Old Jan 5, 2012 | 08:50 PM
  #3  
Stunna MIKE's Avatar
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Default Re: obd2 b18b1 into 89 civic si

Why don't you just save a ton of money and stay obd0. It's just an LS...
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Old Jan 5, 2012 | 08:56 PM
  #4  
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From: NoRthERn Cali
Default Re: obd2 b18b1 into 89 civic si

Originally Posted by Stunna MIKE
Why don't you just save a ton of money and stay obd0. It's just an LS...
Oils be because he is getting a full obd2 swap and with it all he would need is the ecu jumper (obd0 to obd1) and an ecu. As opposed to having to get:
Ecu
Distributor
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Old Jan 6, 2012 | 12:11 PM
  #5  
Randysi's Avatar
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Default Re: obd2 b18b1 into 89 civic si

Originally Posted by crx_si-r
Oils be because he is getting a full obd2 swap and with it all he would need is the ecu jumper (obd0 to obd1) and an ecu. As opposed to having to get:
Ecu
Distributor
Im kinda confused. I can only run an obd1 ecu with an obd1 distributor, correct? as for the alternator I can use the obd2 one. and then for the injectors, arnt obd2 injector clips different from 0bd0 and obd1 clips? Wouldnt I need obd1 injectors also?
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Old Jan 6, 2012 | 12:21 PM
  #6  
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Default Re: obd2 b18b1 into 89 civic si

have to try using ur obd0 alternator or splice a obd2 plug on. if the car is multi port he can use his old injectors same 240cc. you need to get a obd1 conversion harness at the ecu using ur obd-0 harness. u can not run a b18 off a obd-0 si ecu for a d15 it will run shyty. u need a obd-0 dizzy of u can find it they are becoming more rare.
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Old Jan 6, 2012 | 12:25 PM
  #7  
Randysi's Avatar
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Default Re: obd2 b18b1 into 89 civic si

Oh and crx si-r Im probably going to be looking to get a ecu jumper and misc off of you. Thanks.
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Old Jan 6, 2012 | 12:27 PM
  #8  
Randysi's Avatar
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From: Short Gap, WV
Default Re: obd2 b18b1 into 89 civic si

Originally Posted by apexi_rsx
have to try using ur obd0 alternator or splice a obd2 plug on. if the car is multi port he can use his old injectors same 240cc. you need to get a obd1 conversion harness at the ecu using ur obd-0 harness. u can not run a b18 off a obd-0 si ecu for a d15 it will run shyty. u need a obd-0 dizzy of u can find it they are becoming more rare.
Im gonna go obd1.
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Old Jan 6, 2012 | 01:50 PM
  #9  
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From: NoRthERn Cali
Default Re: obd2 b18b1 into 89 civic si

Originally Posted by Randysi
Im kinda confused. I can only run an obd1 ecu with an obd1 distributor, correct? as for the alternator I can use the obd2 one. and then for the injectors, arnt obd2 injector clips different from 0bd0 and obd1 clips? Wouldnt I need obd1 injectors also?
No. The OBD2 distributor will work fine with an obd1 ecu. The alternator is the same, except of course for the plug and it's wiring other than that your good to go. The injectors from an obd2 car work the same as obd1 they run on a 12v power source, and you can use them on an obd0, obd1 and obd2 set up as long as you give them a 12v power source and remove the resistor box from your oem set up.
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Old Jul 23, 2012 | 08:48 AM
  #10  
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Default Re: obd2 b18b1 into 89 civic si

Hey i think i have similar questions or in need of an explanation.
i have an 83 accord lx SE..putting in a b20b...need to know if i have to do obd1 to 0bd0 or obd2 to obd0... and what else do i need that is essential to finishing the car .
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Old Jul 23, 2012 | 09:07 AM
  #11  
Randysi's Avatar
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Default Re: obd2 b18b1 into 89 civic si

Please lock this thread lol
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