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Discussion Starter #1
I'm looking for ideas on how to do this. My first question is "is it possible?"
I'v hear everything from yes, its not so bad, to no, its impossible.
So I'm just going to infer that is difficult :???:

the setup:

96 d15b with both vtec-e (12v lean burn mode) and sohc-vtec (16v wild cam mode)

91 crx hf (with 88 si parts car)

here are my ideas (they may be flawed, but I've never done anything like this before,) I've left out all the messy details, thats what I want to be filled in on. I have some time and some money. but where should I start? I was thinking that option 3 would be best


1.completly rewire the car for odb2
-use the right odb2 ecu (witch I don't have, but could get?)
-use a odb2 ex ecu and a vafc
-use a odb2 hx ecu and a vafc

2.completly rewire the engenige for odb0
-use 2 vafc
-use a odb0 ecu (from a b16) for sohc-vtec and a vafc for vtec-e
-get a reprogramed odb0 ecu (from a b16) for vtec-e and a vafc for vtec


3. convert both to ODB1
**-use a civic vx ecu for the vtec-e and a vafc for the sohc-vtec.**
-use a civic ex ecu for the sohc-vtec and a vafc for the vtec-e.

4. Buy some sort of EMS that has 2 vtec switched (haven't found one yet)




:???: Freaze_or_bUrN
 

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Freaze_or_bUrN said:
I'm looking for ideas on how to do this. My first question is "is it possible?"
I'v hear everything from yes, its not so bad, to no, its impossible.
So I'm just going to infer that is difficult :???:

the setup:

96 d15b with both vtec-e (12v lean burn mode) and sohc-vtec (16v wild cam mode)

91 crx hf (with 88 si parts car)

here are my ideas (they may be flawed, but I've never done anything like this before,) I've left out all the messy details, thats what I want to be filled in on. I have some time and some money. but where should I start? I was thinking that option 3 would be best


1.completly rewire the car for odb2
-use the right odb2 ecu (witch I don't have, but could get?)
-use a odb2 ex ecu and a vafc
-use a odb2 hx ecu and a vafc

2.completly rewire the engenige for odb0
-use 2 vafc
-use a odb0 ecu (from a b16) for sohc-vtec and a vafc for vtec-e
-get a reprogramed odb0 ecu (from a b16) for vtec-e and a vafc for vtec


3. convert both to ODB1
**-use a civic vx ecu for the vtec-e and a vafc for the sohc-vtec.**
-use a civic ex ecu for the sohc-vtec and a vafc for the vtec-e.

4. Buy some sort of EMS that has 2 vtec switched (haven't found one yet)




:???: Freaze_or_bUrN
I am also thinking about this swap into my 88 HF
I've already HOMEMADE my OBD-0 to OBD-2A jumper harness but I'm still waiting for the actual P2J (I believe) 5 spd ECU to come in from Japan. I've gotten 3 of these lil dudes but no ECU yet.

I though about running the engine off an OBD-1 P08 ECU and just forget about the 12 ECO-mode until I sourced the correct ECU but why go through all the hassle anyway?

I love the idea of maintaining the original "HF" High Fuel idea and combining it with the newer engine
 
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Discussion Starter #4
Human Resouce, Where did you find info on makeing jumper harnesses? about how many new wires, and sensors do you think I'll need.... Am I correct in thinking it would be easiest to use odb1???
 

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The best option is to use the stock ecu from the 3-stage VTEC. VTEC-E if I'm not mistaken does not necessarily just turn on at a specific RPM, it determines engine load, TPS, etc to try and keep it in 12-valve as much as possible and switch only on demand. So just turning it on at a specific RPM might not be wisest.
 

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Freaze_or_bUrN said:
Human Resouce, Where did you find info on makeing jumper harnesses? about how many new wires, and sensors do you think I'll need.... Am I correct in thinking it would be easiest to use odb1???
check out PGMFI.org board
I used the NON OBD to OBD-1 rules but instead of using the OBD-1 pin outs I found the OBD2A pinouts somewhere on the hybrid board (I think).
Not much info on these engines so before starting a headache I'd stick with the stock ECU that it was intended for.
What if OBD-1 doesn't work correctly????
Then you're stuck waiting for an ECU that hasn't popped up yet....
Your car would collect dust,
you would be sad :(
 
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