My vtec dohc head has p7s-2 stamped on the side does anyone know what it is from??

 

P72 = GSR.

 

yeah ur right. p72 gsr. redline @ 8

 

What year is the gsr head? Do you guys know?

 

2007

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hung_kuen &raquo;</TD></TR><TR><TD CLASS="quote">What year is the gsr head? Do you guys know?</TD></TR></TABLE>

Pop your hood and look just above the exhaust ports on the left hand side. There should be a series of circles with numbers inside them ie. (9/5).

What numbers do you see?

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by zeimbo &raquo;</TD></TR><TR><TD CLASS="quote">2007</TD></TR></TABLE>

stop ******' with the kid

 

(9/6) (5) (3/1) (9/0)

 

so it's from a 96 gs-r

 

No it's a '90 GSR...(LOL)

Yea he's right though, it's a '96 GSR. Isn't P72-2 obd2a(96+)? And P72 is obd1 (94-95)

 

Whats the diff between a p72-1 and p72-2 cause i seen a head stamped p72-1 and its from a 98 or at least the markings say that by the exhaust port

 

From what i know of P72 GSR heads, they are all the same.

As for the different stamping, i think P72-1 was 94-97 and P72-2 was 98+

 

A GSR head is a GSR head either way. Now if we were taling PR3 then we get into some grey areas. The ITR heads were stamped PR3 as well, but they had a green stripe on them (i believe). Last i checked the GSR head whether it be OBD1 or OBD2 has the same plugs, the IM plugs are different though.

 

Okay i figured it out p72-1 is jdm and -2 is usdm

 

no you didn't.......

I just bought a complete 1997 usdm B18C1 GSR yesterday, it is a P72-1

Like i said in an earlier post, earlier model GSR's had that stamping, later models were stamped P72-2

 

also i dont think there was a JDM motor that uses the p72 casting, they all used PR3 didnt they? None of the JDM motors use the square combustion chambered heads from what i have read. Could be wrong and im up to find out for sure.

 

The JDM B18C did in fact come in a gsr version (called something like sir-g). It has slightly higher compression pistons making 178hp. I had one last year.

Most people know of the B18C type R, that's the one that came with the pr-3 head. Actually to add to this thread, the PR3 also came with different stampings such as pr3-2, pr3-4 and such

 

yea i knew the PR3 cast came with i think three different cast numbers (2,3,4), i was just unsure as to all the JDM GSR specs and what heads they came with. It seems to me as if a P72 GSR head in japan is like a type r head here, on the rarer side.

Like i said i wanted to know, and learning is why i get on this site everyday. glad i have this info in the back of my head now

 

Head Identification Post with PICS!!!

Here is a post that helps discuss all of this

PR3-X and P72-x where X is a check digit from honda. its random as it refers to the serial numbers in the third and fourth in the dates for when the block was produced.

 

GOD CLEAN pics are always key. just to give an example, there is an 86 and a 98 stamped pr3-x head which can easily be confused....

 

no confusion, there was no such thing as a pr3 in 1986, it wasn't even invented yet

the pr3 came out in 1989 as a 1990 model for civic and crx and integra's

 

Okay cause i was gonna say my 96 head says p72-2 but its all clear now

 

bump, just checked, sorry for the confusion on my part. just double check, there were casting numbers for 87 on the 1988-1991 JDM Honda Integra RSi/XSi (DA6/DA8). there were development b16 in 85 with the pr3, casting started in 86 in japan and were a limited production...

 

Good info!!

 

I have never seen any proof of this......

- i have been importing for 15 years now, thousands of engines, never seen one earlier than 1989, not ever!

- i have most Honda brochures from around the world, that gen Integra came out in 1989, not before!

- 1st gen teg's had d series in them

 

Not going to feed the forum monkeys.

hope all info was helpful..