Dec 4, 2009 · Right something i havent seen covered before and i just happend to have both in bits on the bench so here we go. The difference between the usual PR3 b16a/b, b18c5/6 and the P72 GSR, b18C4/1 head designs. Difference between the combustion chambers. P72 C4 HEAD (GSR/C1) [/IMG] PR3...

Apr 22, 2005 · GSR head plus B16 = bad combo... its dyno prove that the P72 head is superior to the PR heads in both tq & hp. b16 head flow SLIGHTLY better then p72 but the P72 is a diff casting from the others. the gsr head has better quinch spots in the combustion area & even know up a few points in cr. now B16A + GSR = good combo... a ITR with GSR head ...

Nov 1, 2005 · He's asking for the head code, not ECU.. as far as I know: B16 and ITR heads: PR3 GS-R head: P72 B18B head: P75

Dec 1, 2008 · P72 = GS-R/18C1 in the USDM. P7300 = JDM DC2-R, P73A0 = USDM DC2-R Is the B16B supposed to have a PCT or P73 stamping on the head?

Sep 1, 2010 · In the port, polish and flow cylinder head science (as well as other parts, including 2 stroke and rotary engines), nicer doesn't mean better. Sometimes yes, as tama666 has said.

Apr 22, 2005 · P72 with spring, cams, valve job, & P7P is better then the other heads mod for mod.. if Gsr heads are so good why is everyone sellin them dirt cheap or trading them for a B16 head>?

Aug 23, 2011 · Ok guys I know this has been asked in many threads but me and my friend have searched or the last two days and we keep running into circles!!!! on my head its stamped pr3-1 now throughout my search I found pr3 is all b series. and I have also saw on my head is stamped with 97. now when I...

Jul 26, 2014 · So I bought a p72 head all broken down ready for the machine shop, problem im having is that the hardware is not all there and what is there are rounded head bolts. So I was thinking what should I do?? I have a shop down the street that has a LS integra and I talked to him about pulling the V/C...

Sep 2, 2005 · The only thing really holding back the P72 head is the über crappy intake manifold and dual stage butterfly gayness. Get a Skunk2 IM, port match the runners and to the TB, chip or replace the ECU with a higher, single stage Vtec x-over, and you have a setup that is going to outflow a PR3 head. A CTR/ITR cam setup will ever further impliment that.

Jun 7, 2011 · b16's and type r b18c's have pr3 stamped on the front of the head. Some type r heads are stamped p73. I think that b18c4 (vti/sir) heads have p72 on them. The stud pattern of the c4 inlet manifold is different also. If you compare it side by side with a …