i have a jdm obd-0 b16 i thought i had a regular b16 but i was told buy some guy at a car show it might be a type-r head. the code stamped on the head was pr3-4 what do you think?

 

from what I know type r heads are the same thing as b16 heads, only thing is a type r is a modded or ported head iunno for sure though

 

All b16 heads, and b series type r heads are stamped pr3. Only diff on the R, is a mild polich of the bowls and intake ports, aside from better cams, springs and slightly light valves.

I have seen a dyno off an engine using the exact same valvetrane and cams in both heads on the same block, with a difference of 4hp to the wheels.

 

if all b-series heads are stamped pr-3 why is mine stamped pr3-4? is this a mistake in the stamping or is it just that i have the beter valvetrain in my head?

 

look at the casting stamp on the head above the headers should tell you the year...there are 4 circles with lines in the center and numbers on either side

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Loserkidwac &raquo;</TD></TR><TR><TD CLASS="quote">look at the casting stamp on the head above the headers should tell you the year...there are 4 circles with lines in the center and numbers on either side</TD></TR></TABLE>


the 4 circles on the head read

9/1 /4 1/5 0/9

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ef-b16sedan &raquo;</TD></TR><TR><TD CLASS="quote">


the 4 circles on the head read

9/1 /4 1/5 0/9</TD></TR></TABLE>

no biggie, made 1991 09/15

PR3 heads are stamped pr-( ) what ever number, it doens't matter, its just a designation for where it was designed.

 

so your saying that the "pr3-4" don't mean much? and its not a type-r, just a regular b16 head? or am i just not understanding u?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Deetz &raquo;</TD></TR><TR><TD CLASS="quote">

no biggie, made 1991 09/15

PR3 heads are stamped pr-( ) what ever number, it doens't matter, its just a designation for where it was designed.</TD></TR></TABLE>
How exactly do you interperet these numbers?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RockinthEFhatch &raquo;</TD></TR><TR><TD CLASS="quote">
How exactly do you interperet these numbers?</TD></TR></TABLE>

thats what i'm trying to figure out. i was told buy some guy at a car show that with my head being stamped "pr3-4" meant that it was a type-r head! but i cant really seem to get a clear answer as how to tell what type of head i have with out riping it apart.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ef-b16sedan &raquo;</TD></TR><TR><TD CLASS="quote">

thats what i'm trying to figure out. i was told buy some guy at a car show that with my head being stamped "pr3-4" meant that it was a type-r head! but i cant really seem to get a clear answer as how to tell what type of head i have with out riping it apart.</TD></TR></TABLE>
Wholy smokes, like i said, they are the same head right from the factory casting! Type R had the pr-( ) number stampes also, no different then the ones from a b16a. You can tell the diff by looking at it. Chances are, if yuo have a b16, its just a regular head anyway. The R head is slithly cleaned up, its only like a difference of 4hp anyway.

Here's a pic from my 99 type r head stamped pr3-4, and below shows the 1999 production year in the circles. A b16a head could be stamped the same way as its a pr3-4 also. I have an earlier b16a head stamped pr3-2, but its no different than any other regular b16 head from other years with different stampings

 

ok my fault i guess i miss understood you

 

yea my b16 says pr3-4, you can also tell if its type r if the vtec on the valve cover is capitalized.... dohc VTEC instead of DOHC vtec

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by philkehn &raquo;</TD></TR><TR><TD CLASS="quote">yea my b16 says pr3-4, you can also tell if its type r if the vtec on the valve cover is capitalized.... dohc VTEC instead of DOHC vtec</TD></TR></TABLE>

they can change the Valve covers

mine says PR3-4 8/9 8/ 2/9 /

 

what about pr3-1 with 8/9 9/0 2/3 9/0 .. how do i decipher the code? so it was made in 89? then what do the others mean

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by philkehn &raquo;</TD></TR><TR><TD CLASS="quote">yea my b16 says pr3-4, you can also tell if its type r if the vtec on the valve cover is capitalized.... dohc VTEC instead of DOHC vtec</TD></TR></TABLE>
That's the dumbest thing I've ever heard...

 

pr3-1
pr3-2
pr3-3
pr3-4

none of those are specific to an ITR head only. it could be a b16a head, could be a b17a head, could be a b16b head, could be a b18c5 or jdm b18c-r head.

pr3-[1-4] came on:

88-91 EF9 & EF8 Civic & CRX SiR
92-95 EG6/EG9 Civic SiR
92-96 EG2 USDM Del Sol VTEC (or JDM Del Sol CRX SiR)
92-93 DB2 USDM Integra GSR
96-00 EK4 & EK9 Civic SiR & Type R
96-00 DC2 & DB8 JDM Integra Type R
97-01 DC2 USDM Integra Type R
99-00 USDM Civic Si / Canadian Civic SiR

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by philkehn &raquo;</TD></TR><TR><TD CLASS="quote">yea my b16 says pr3-4, you can also tell if its type r if the vtec on the valve cover is capitalized.... dohc VTEC instead of DOHC vtec</TD></TR></TABLE>

no dont go by that..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by philkehn &raquo;</TD></TR><TR><TD CLASS="quote">yea my b16 says pr3-4, you can also tell if its type r if the vtec on the valve cover is capitalized.... dohc VTEC instead of DOHC vtec</TD></TR></TABLE>
The capitalized ones mean that the valve cover is a jdm valve cover usdm valve covers are not capitalized

And your cylinder head has a prodction date of 1991 witch would obviously mean that it is not a type R cylinder head

And last of all the difference between the 2 heads are that the intake ports on a type R head are slightly larger.....and the type R heads have dual valve springs on both the intake and exhaust side as aposed to the b16 head which only has them on the intake side

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 408ed8 &raquo;</TD></TR><TR><TD CLASS="quote">what about pr3-1 with 8/9 9/0 2/3 9/0 .. how do i decipher the code? so it was made in 89? then what do the others mean </TD></TR></TABLE>

well im thinkin that my head isnt a b16a head anymore and that its a b17 head because i remember when i took it out the cams were b17 gsr cams

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 408ed8 &raquo;</TD></TR><TR><TD CLASS="quote">

well im thinkin that my head isnt a b16a head anymore and that its a b17 head because i remember when i took it out the cams were b17 gsr cams </TD></TR></TABLE>

Nah man here you said your head says<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 408ed8 &raquo;</TD></TR><TR><TD CLASS="quote">what about pr3-1 with 8/9 9/0 2/3 9/0 .. how do i decipher the code? so it was made in 89? then what do the others mean </TD></TR></TABLE>

your head was made in 89 its not a b17

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mr.speaker &raquo;</TD></TR><TR><TD CLASS="quote">no dont go by that.. </TD></TR></TABLE>

isnt that also with the 2nd gen jdm b16a motor from the xsi da and the sir II eg?

 

pr3-4 = 99 civic SI

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JakeSpec420 &raquo;</TD></TR><TR><TD CLASS="quote">pr3-4 = 99 civic SI</TD></TR></TABLE>

umm im sorry but..............you're an idiot.....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by turboZChatch &raquo;</TD></TR><TR><TD CLASS="quote">
your head was made in 89 its not a b17</TD></TR></TABLE>

Thats correct. Not that it matters, but the B17A head is still just a pr3 head also, no difference!