B20 Compatability

[EuroB]

Hey just a quick question

I am gonna be putting a B20 into my car shortly, im just wondering if I can run my stock P06 ecu or if ill have to upgrade to a DOHC ecu like a P74 or P75 from a 92-95 non vtec integra???

[YamahaV8]

Use the ECU that goes with the specific engine?

[Deetz]

There are two ecu's that i tried on my B20Z:

- PR4

- P75

I found the PR4 ecu to be the better choice. The engine just ran better all the way around. It comes from the 92-93 Integra B18 non vtec

[EuroB]

well if im assuming this right the p75 and PR4 are gonna be pretty much the same thing cause they both come from a B18 non vtec

but the PR4 from 90-93 is obd 0
and the pr4 from 96-99 is obd 2

but i gotta stick with OBD 1 for hondata reason
so i guess the p75 wil be the right choice i also got one other question which i need an awnser to quick cause i wanna order this stuff on wed.


so my car being OBD 1, the P75 ecu being OBD 1 hondata Needing OBD 1, its just common sence I stay with OBD 1
but the B20 is obd 2 so what all do i have to change out to make it OBD 1

from what I gathered i need to change the distributer...(which i dont see why)
and the Intake manifold... but i also heard the intake manifold is fine aslong i change the fuel injectors so... so is there anything im missing? thanks

[Mr_ET]

Originally posted by EuroB
well if im assuming this right the p75 and PR4 are gonna be pretty much the same thing cause they both come from a B18 non vtec

but the PR4 from 90-93 is obd 0
and the pr4 from 96-99 is obd 2

but i gotta stick with OBD 1 for hondata reason
so i guess the p75 wil be the right choice i also got one other question which i need an awnser to quick cause i wanna order this stuff on wed.


so my car being OBD 1, the P75 ecu being OBD 1 hondata Needing OBD 1, its just common sence I stay with OBD 1
but the B20 is obd 2 so what all do i have to change out to make it OBD 1

from what I gathered i need to change the distributer...(which i dont see why)
and the Intake manifold... but i also heard the intake manifold is fine aslong i change the fuel injectors so... so is there anything im missing? thanks

the 92-93 DA PR4 is obd1, only the 90-91 PR4 is obd0

[EuroB]

alright thanks everyone,
Im just gonnna hit up the junk yard and pull a ECU out of the first 92-95 no vtec integra i see!

[Deetz]

^^^ make sure its a 5 speed model

If you have problems, i still do have that extra P75 ecu sitting around. ($80)

[trdjce10]

B18 ECU will run lean on the B20 unless you going to chip or tune it. The distributor connection is different, so that's why you will have to change distributor or make a conversion connector.

Does your B20 have a knock sensor? Only the high compression B20 have knock sensor.