This may be a stupid question, I assume everybody knows...

I keep seeing people talk about PR3 etc, this and that, and I see it on part numbers. Is this some sort of version number or revision number for Honda hardware? How does this system work and which parts does it apply to?

Thanks,
zelifcam

 

its an ECU usually found for obd0 or others say pre-obd b16 swaps.....believe it came out of the jdm crx sir. Or was it the integra xsi cant remember it late and im tired as hell...

 

errr, any better answer?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by zelifcam &raquo;</TD></TR><TR><TD CLASS="quote">errr, any better answer?</TD></TR></TABLE>
I don't know the exactly technical term, but you have the idea. PR3-XXX is an identifier of sorts, it is used to associate certain parts, for instance the ITR/B16 heads are the same cast so they share the PR3-X number, it also identifies ECUs, piston, etc used in this mix...As far as the heads castings go, there hasn't been any correlation I have seen between say PR3-3, PR3-4, PR3-2 etc...seems to be fairly rendom.

 

PR3 refers to the ECU/quasi engine code of the 88-91 JDM B16A.

PG6 : 88-89 Integra (all makes)
PM5 : 88-91 Civic/CRX DX
PM6 : 88-91 Civic/CRX SOHC Si
PM7 : 89-91 DOHC ZC (JDM 'EF' ECU)
PM8 : 88-91 CRX HF
PR2 : 89-91 ZC (Euro)
PR3 : 89-91 JDM B16A EF8/9
PR3 -J00 or J51 : 92 JDM Integra B16A EF8/9
PW0 : 89-91 JDM B16A EF8/9 DA6-XSi
PR4 : 90-91 Integra LS/GS
PS9 : 88-91 4 door Civic EX Auto
P05 : 92-95 OBD-1 Civic CX
P06 : 92-95 OBD-1 Civic DX
P07 : 92-95 OBD-1 Civic VX
P08 : 92-95 OBD-1 Civic D15 JDM
P0A : 94-95 OBD-1 Accord EX
P13 : 93-95 OBD-1 Prelude Vtec
P14 : 93-95 OBD-1 Prelude Si (non Vtec)
P27 : 92-95 OBD-1 EG JDM Civic 1600 sohc
P28 : 92-95 OBD-1 Civic Si/Ex
P30 : 92-95 OBD-1 DelSol DOHC Vtec Si/EG SiR
P54-G31 : 1997 Honda Accord 1.8 LS
P61 : 92-93 OBD-1 Integra GSR
P72 : 94-95 OBD-1 Integra GSR
P72 : 96-00 OBD-2 Integra GSR
P73 : 96-00 OBD-2 Integra Type-R (JDM & USDM)
P74/75: 92-95 OBD-1 Integra LS/GS
P75 : 96-00 OBD-2 Integra LS/GS
P2N : 96+ OBD-2 Civic HX Coupe
P2P : 96+ OBD-2 Civic EX Coupe
P2E : 96+ OBD-2 Civic DX Coupe
P2M : 96+ OBD-2 NZ Civic SOHC VTEC
P2T : 99+ OBD-? Civic Si Coupe
P5P : 97-00 OBD-2 Prelude Type-S (JDM ECU)
PBA : 97+ US Acura 1.6EL
PCT : 98+ JDM ITR / CTR
PCX : 99+ OBD-? S2000

The "PR3" part is used on the ECU, the pistons, the head, etc. The B16A part is only used when identifying the block.

 

It's also on ITR heads.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 92b16vx &raquo;</TD></TR><TR><TD CLASS="quote">It's also on ITR heads.</TD></TR></TABLE>

Show me...this is an 01 ITR head...P73

 

Go to this link and look at the part about the ECU numbers.
http://www.hondata.com/techecuid.html

Basically all Honda part numbers are arranged like this:

XXXXX-XXX-XXX

First part is for the part itself (i.e. 37820 = ECU)
The Second Part is for the partuicular part itself (i.e. PR3)
The third part is the revision of that part.

This is true for all parts that Honda makes from ECU's to the little clips that hold your trim on.

Since all ECU's start with 37820 and noone really cares about the revision number people just refer to the identifier number (i.e. PR3)

 

ITR's do also use PR3 heads, same as all B16A's.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BauleyCivic &raquo;</TD></TR><TR><TD CLASS="quote">Show me...this is an 01 ITR head...P73
</TD></TR></TABLE>
I guess I can take one tomorrow, but you'd have to take my word for now,but I know the 96-98's have it because I have seen the two here on post, and a couple others around town.

 

Heh...I completely forgot the part about them being the same cast

So is it really arbitrary if an ITR head is P73 or PR3?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BauleyCivic &raquo;</TD></TR><TR><TD CLASS="quote">Heh...I completely forgot the part about them being the same cast

So is it really arbitrary if an ITR head is P73 or PR3?</TD></TR></TABLE>
Haha, I guess not

 

I am even more confused now.

 

you won't find p73 on any type r engine only on the ecu, the head casting on my jdm 98+ type r is pr3-2, pr3 is also for b16's(like some of the others said)