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92 Civic CX with D15b2 swap?

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Old 07-04-2012, 07:09 PM
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Default 92 Civic CX with D15b2 swap?

Hello,

My buddy just purchased a manual 92 CX to commute to work because of the good gas mileage. I'm looking at the motor and it's a 16v d15b2.

That's the motor out an CRX/EF civic, isn't it?

Is this a step back?

What kind of MPG can he expect?

Is there different ecu running for the OBD0.

Motor/exhaust looks stock? Will he have problems with CA smog?

Any input would be appreciated.
Old 07-04-2012, 07:41 PM
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Default Re: 1992 CX Motor swap?

Found in:
1988–1991 Honda Civic GL/DX/LX
1988–1991 Honda Civic Wagon Wagovan/DX
1988–1991 Honda CRX DX
1992–1995 Honda Civic LSi Hatch/Saloon (European Market)
1992–1995 Honda Civic DXi Hatch/Saloon (European Market)
1990–1995 Honda Concerto (European Market)
Displacement: 1,493 cc (91.1 cu in)
Bore and Stroke: 75 × 84.5 mm (3.0 × 3.33 in)
Rod Length: 134 mm
Compression: 9.2:1
Power: 92 hp (69 kW) at 6,000 rpm (US)
90 PS (66 kW) at 6,000 rpm (Europe)[9]
Torque: 88 lb·ft (12.2 kg/m, 119 Nm) at 4,700 rpm
Valvetrain: SOHC (four valves per cylinder)
Cam Gear: 38 tooth
Piston Code: PM3
Fuel Control: OBD-O DPFI and OBD-1 MPFI
Redline: 6,500 rpm, 7,200 rpm rev limiter
Head Code: PM5
ECU Code: PM5/P04
It isn't necessarily OBD0. Mileage should be roughly comparable to stock.
Old 07-04-2012, 09:01 PM
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Default Re: 1992 CX Motor swap?

It's an OBD0 engine from a 4th generation Civic (88-91) swapped into an OBD1 5th generation Civic (92-95).

This swap will fail CA smog.
Old 07-04-2012, 09:19 PM
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Default Re: 1992 CX Motor swap?

Originally Posted by RonJ@HT
It's an OBD0 engine from a 4th generation Civic (88-91) swapped into an OBD1 5th generation Civic (92-95).

This swap will fail CA smog.
I'm genuinely curious RonJ, how do you know it's an OBD0 motor/ECU? I don't see anywhere that the OP mentioned exactly what ECU he's running, and if the motor was swapped, I think it's a perfectly reasonable assumption that the PO put in an EDM OBD1 motor, since EDM is evidently the new hotness now.
Old 07-04-2012, 09:42 PM
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Default Re: 92 Civic CX with D15b2 swap?

I just checked, it's running the stock ODB1 ECU.
Old 07-04-2012, 10:19 PM
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Default Re: 1992 CX Motor swap?

Originally Posted by jbpnoman
I'm genuinely curious RonJ, how do you know it's an OBD0 motor/ECU? I don't see anywhere that the OP mentioned exactly what ECU he's running, and if the motor was swapped, I think it's a perfectly reasonable assumption that the PO put in an EDM OBD1 motor, since EDM is evidently the new hotness now.
I just assumed that we're talking about a US or Canada 92 Civic and D15b2 engine.
Old 07-04-2012, 10:21 PM
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Default Re: 92 Civic CX with D15b2 swap?

Originally Posted by 91crxturbo
I just checked, it's running the stock ODB1 ECU.
My understanding is that the car still won't legally pass CA smog because a 4th generation engine was swapped into a 5th generation Civic.
Old 07-04-2012, 10:33 PM
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Default Re: 92 Civic CX with D15b2 swap?

Originally Posted by RonJ@HT
My understanding is that the car still won't legally pass CA smog because a 4th generation engine was swapped into a 5th generation Civic.
This...might be true. I'd be more worried about the fact that a non-US motor was put in the car. Assuming the motor is in fact OBD1, it's still a "5th gen" motor in the technical sense, it's just a Euro 5th gen motor and not an American 5th gen motor.

OP, what is the date code stamped on the head?
Old 07-04-2012, 10:58 PM
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Default Re: 92 Civic CX with D15b2 swap?

pm3-1
Old 07-04-2012, 11:24 PM
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Default Re: 92 Civic CX with D15b2 swap?

That's the head code from a D16A6 off a '90 SI, not the date code. The date code is two circles with two numbers in each, most likely near the head code. On the plus side, you've indirectly answered my question.

That also tells us that this motor is a mish-mosh of parts. Awesome.

Out of curiosity, what ECU is the car running on, and has the head been MPFI converted?

This combination of factors is probably going to make smogging the car a royal PITA.
Old 07-05-2012, 06:11 AM
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Default Re: 92 Civic CX with D15b2 swap?

Originally Posted by 91crxturbo
pm3-1
Originally Posted by jbpnoman
That's the head code from a D16A6 off a '90 SI, not the date code.
Look here:

http://www.ramscyl.com/honda.htm

This site states that the PM3-1 head comes from a 93-95 D15b2 engine. This presumably is the Euro D15b2 you mentioned.
Old 07-05-2012, 07:57 AM
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Default Re: 92 Civic CX with D15b2 swap?

Originally Posted by RonJ@HT
Look here:

http://www.ramscyl.com/honda.htm

This site states that the PM3-1 head comes from a 93-95 D15b2 engine. This presumably is the Euro D15b2 you mentioned.
I'm sorry, I was going off https://honda-tech.com/forums/tech-misc-15/d-series-head-codes-786093/. I saw the link you mentioned, but I was more likely to trust our forums

So in that case, OP, I go back to my previous question. Find the date stamp on the head and post it. That'll help us tell you if it'll be difficult, or impossible to get smogged.
Old 07-05-2012, 11:29 AM
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Default Re: 92 Civic CX with D15b2 swap?

Old 07-05-2012, 08:28 PM
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Default Re: 92 Civic CX with D15b2 swap?

Ok here's all the info:

Head is a pm3-1 stamped as 1990
ECU seems to be the stock p05
Block is a d15b2

How can I tell if the head has been converted to MPFI?

Thanks for all your help so far guys.
Old 07-05-2012, 11:03 PM
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Default Re: 92 Civic CX with D15b2 swap?

Originally Posted by 91crxturbo
Ok here's all the info:

Head is a pm3-1 stamped as 1990
ECU seems to be the stock p05
Block is a d15b2

How can I tell if the head has been converted to MPFI?

Thanks for all your help so far guys.
You have the OBD1, MPFI version of the motor, so don't worry about that. The age range is correct for your motor and body, but if the smog ref wants to be an ***, technically you're putting an older motor in the car, which is an instant fail. Just don't mention it, and if they ask, tell them it's the same year range motor, just from a different trim level (which is totally true).

Is the CEL on? Does the CEL work? Basically, assuming everything is mechanically sound, your friend should be able to get this passed.
Old 07-08-2012, 09:21 PM
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Default Re: 92 Civic CX with D15b2 swap?

No CEL. CEL works fine. Thanks for your help....
Old 07-08-2012, 09:26 PM
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Default Re: 92 Civic CX with D15b2 swap?

Anytime. Let us know what the smog ref says, I'm genuinely curious.
Old 07-08-2012, 10:23 PM
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Default Re: 92 Civic CX with D15b2 swap?

Turns out the car smoged less then 90 days ago anyway...lol didn't need a smog to register. I don't think the smog ref would know it's an older motor as long as it has right the right equipment.

Last edited by 91crxturbo; 07-08-2012 at 10:24 PM. Reason: sd
Old 07-08-2012, 10:42 PM
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Default Re: 92 Civic CX with D15b2 swap?

Originally Posted by 91crxturbo
Turns out the car smoged less then 90 days ago anyway...lol didn't need a smog to register. I don't think the smog ref would know it's an older motor as long as it has right the right equipment.
If he looked at the date stamp (like what HPH posted) he would easily know it's an older motor, but we're only talking what, a year older? Any ref would have to have a HUGE stick up their *** to fail as long as it's the same generation, and falls within spec.
Old 07-08-2012, 10:57 PM
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Default Re: 92 Civic CX with D15b2 swap?

I had to remove the heat shield from the exhaust manifold to read it....=D
Old 07-08-2012, 11:15 PM
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Default Re: 92 Civic CX with D15b2 swap?

Originally Posted by 91crxturbo
I had to remove the heat shield from the exhaust manifold to read it....=D
Like I said, a HUGE stick
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