Howdy, I have a 1990 civic hatch with a 1.6 DOHC ZC in it. I was wondering which computers would be the best to upgrade it to an OBD1.

 

dohc zc motors were only obd 0. now i can only suggest a couple of things.

1. get an obd1 d15 non vtec ecu
2. get an obd1 b18 dohc non vtec ecu

i would think the d15 ecu would work maybe a little lean if that i dont know.also the b18 might work and it may run a little rich. like i said its only a guess. hope it helps.

 

They had OBD1 ZC.. if your going OBD1 get pretty much any OBD1 integra/civic ECU other then the CX ones, and have it socketed and programed with the ZC maps.

 

sorry bout the info. from what i read in my honda engine swap guide it only had 2 versions of the zc motor and they were both 0bd0.

 

eh have to learn some wheres. There were 2 obd0 ZC brown and black topped. Not 100% positive but I believe the OBD1 were mainly used in Rovers and such.

 

You're correct because he said DOHC. There were many versions of the SOHC ZC however.

You need a first gen Integra ECU. You do not want to upgrade to OBD1 with that motor.

 

Actually the PG7 ECU is to rich for the motor. Not sure why but I've known of 2 different ones and the were really rich but put in a chipped ECU with a PM7 rom and they run quite a bit better. This was a PM7 stock rom dump with no tuning and it ran quite a bit better.

 

hmm, well the primary incentive was to be able to have OBD1 so i could use the Hondata S100 system. Then probably tune the car to use 105 octane E85 as a daily driver.