I need to know how many would get copies of an OBD0 to OBD1 ECU Adaptor if it was very cheap.

This is to use any 92-95 OBD1 ECU in their Civic or CRX. This is what you would use on a D16Z6 Upgrade or the B18C or newer B16A...hell even the B18B.

Please reply here.

 

I'd be interested...

 

Seems like it'd at least be worth a look.

 

How much is cheap?

 

I would be in....and I agree...how much is cheap?

 

how much?

 

Yeah, how cheap.

 

its not real hard to make but id be interested to know how much im makin one now for the engine too but how much is cheap

 

guess at 100 each buy in is a little steep at AAMP.

 

Since I dont know jack about wiring OBD1 VTEC engines into a CRX (which is something I need to learn soon) would this be something that would allow a chipped p28 ECU to plug right into the existing engine harness? Would there be any other wires that I would need to run? I'm obviously still confused about wiring a car in general.


[Modified by freud, 7:06 AM 11/16/2001]

 

its has differnt sensers and stuff and has no injector resister box so i dont think so i would just rewire it

 

I was thinking more around $75 to 80 and shipping would be about $4-6 bucks.

It would allow you to run about any engine with the use of the following OBD1 ECU's: D16Z6 P28, B16A3 P30, B18C1 P72, B18B1 P74/75, D15B7 ____ (For SOHC Non-VTEC no matter liter size).

I have a good amount of the connectors to make them. I am going to buy the adaptor from Place Racing and then make copies and distribute them.

I am starting a mailing list for this as well. Everyone replying I am putting on the list. Once I buy the harness, I will go ahead and start making those copies. I must have about 5 donor sets of plugs OBD0 female and OBD1 male. Just need the adaptor.

 

When you have the adapters ready. I will be very interested. Let me know.

 

If you wanted run run a D16Z6 or D16Y8 SOHC VTEC in with your existing Si engine harness...to avoid all the wiring changes (and basically keep the stock harness about stock) you'd have to use an 88-91 D16A6 Si Intake Manifold and port it 3/16 at the head manifold ports - change out FPR to D16Z6 - change out injectors to 92-95 or 96-00....and use the matching injector connectors (or they won't connect).

Buying a premade harness and ECU adaptor is almost unescapeable for the SOHC VTEC Swap. If you want to run the D16Z6 OBD1 ECU...you have to run the Distributor, and Exhuast manifold as well. If you have an Existing header, you can simply antiseize a stubby bolt and seal off the old O2 sensor bung.....then figure out from pictures where the new position should be for 92-95 OBD1 electronics.

The D16Z6 Distributor, the change in wire positions from the Intake Manifold, and the differences in wiring here and the lack of an injector resistor.....everything combined make $300 for a premade harness extremely nice! $300 is worth it....I've been through trying to wire it up...and there is just too much cutting and splicing.

I would do it again if I knew I was doing the right things however.

And I plan to do Si Harnesses and Convert them for D16Z6 Motor/D16Z6 Manifolds/Distirbutor (2 Si spares ready)..........but this will be down the road after I get the harness adaptors done. The DX Harness also (3 spares ready)....both done off of copies.

I first have to get profficient at the adaptor harness however.

 

Well the engine harness is pretty difficult. But only due to the number of relocations. A lot of things change from 91 to 92 in Civics. That's why I recommend just using all the manifolds and such from the D16Z6...buying a $300 premade Harness from Place or ARD Performance....and buying the adaptor. Now the Adaptor from either of the above palces is also $300...legitimate rape you may call it, I know I do..I think they are worth $150-$175 at best. But it Doesn't take more than Getting a 4G ECU, 5G Plugs, a $300 Premade Adaptor, Soldering Station ($150), Rather Large Spool of Wire, A Silicone Based Sealant (I use something different I am keeping to myself), and about 2.5 hours of your time from start to finish. Overall $75-$80 bucks isn't worth alot of peoples time....especially when you have to locate the ECU's and Harness End Pieces from a 5G...and make several copies!

 

Correction $310 from Place Racing and you have to send them OBD1 Plugs clipped off a Cabin Harness.

Correction ARD Does Not Carry the OBD0-OBD1 Adaptor.


If your looking for a premade engine swap harness, go here: http://www.ardperformance.com/store/...framehome.html

Click on: JDM Engines
Click on: "Where do I get engine swap parts, and motor mount kits?"

ARD I guess carries Place Racing Swap harnesses from the look sof it.


[Modified by NC_Rex, 10:51 AM 11/16/2001]

 

Hey NC_Rex, maybe you can help me out here. I just bought this civic and it already has the VTEC engine in it. I'm trying to find out what he did to make this run. It's a 90 civic hb (std). It's got a 95 sohc vtec motor with crx si ecu, distributor, and trans. Now I do have the 95 sohc intake manifold. So do you know what this guy did to make this engine work??

 

Yeah since it has the Si distributor, it's running a MSD RPM switch (if you have VTEC), and the exhuast manifold is probably the standard 4G DX or Si that comes on our models.

What he did for the P28 Intake Manifold is just relocate the Air Intake temp back a bit, Relocate the Map and purge off the firewall...5 wires, run the Si Fuel Line from Fuel Filter, booster line stays usuable, Si Throttle Cable.

The RPMS Switch runs about $40 bucks from Summit. It's small and black with 4 wires. I think 2 blacks, 1 red and one white. Probably sitting off the ECU or firewall.

Did you still have an injector resistor by chance?

 

yes I do have the injector resistor. Also I do have the autometer rpm switch. Is it just 1 wire that is supposed to be connected to the vtec silenoid? The engine runs pretty good. But I'm thinking it could run even better. By changing everything to obd1, is that going to improve anything?

 

I know the engine runs smoother idling and part throttle with the OBD1 ECU...but I really wouldn't know what imporvement it would have unless I had done both and had seen for myself.

My thoughts are the VTEC maps would kick in more appropriately while driving with the P28 ECU and not the PM6 with RPM Switch.

The Resolution is better on the distributor for timing, I do know this, therefore it's better for things more critical like boost.

The one benefit the newer setup would have is that the O2 sensors last for nearly 100,000 miles or so they say. Ours we are recommended to change every 50,000 I think, I think.

What you would need to changeover is:
Engine Swap Harness
OBD Adaptor for ECU
P28 Manual D16Z6 ECU
D16Z6 Distributor
Exhuast Manifold...or header with relocation of 4-wire O2 sensor

 

That's the only thing I think would benefit from the change, the vtec maps. But then again I'm thinking about the Zdyne 1 wire vtec conversion. I'm thinking about just doing that and having them set my maps for vtec once it kicks in. The price is hefty, but probably lower than going obd1?? What's you thought on that?

 

I dont mean to kill your thread....but I am sorry. Until I saw that you were copying....Hmm. Placeracing...you could have atleast bought a Hasport one. Atleast that way we know it will work. Good luck getting those OBD male plugs. You can buy them from Hasport, but they are 40 bucks.

 

I didn't know Hasport made them....I'll give them a call Monday. I just need to buy one from somewhere and copy it.

Getting those plugs is actually quite easy. I mean it's a pain, but you just have to get an ECU and pull the circuit board, cut off the metal terminals, straighten them and then high-heat solder then new wires on. My only concern is, I know what to coat them with for an insulator, but I'd like to get an almost plastic-like hardening epoxy to put on the back half-inch of these ECU connectors to get everything solid. That's what I've gotta work on once I get one. It shouldn't take me more than a couple of days to find something that will suit the purpose.

I just packaged my OBD1 connectors earlier this morning for Place Racing. But I'll give Hasport a call and see what they have to say.


[Modified by NC_Rex, 9:44 AM 11/17/2001]