b16 or b18c head

[jdm free]

i saw this n thought it was sorta interesting since ive been told a few times on here to get a jdm b16 head for gsr becuase it flows better


theyr the same?

http://www.we-todd-did-racing.com/files/1010924_bqt4h/pr3vsp72Flowbench.jpg

[underpressure02]

Stock for stock was under the impression the b16 flows better then a gsr.

[CHR!S]

do you happen to know which year heads were compared for this? ive been told by a couple engine builders that a stock gsr head flows better than a stock b16 head. but you can port a b16 head much more than a gsr head, making the b16 head flow more.

[Ion22]

The Gsr head is one of the worst flowing heads because of the Intake Manifold. I was told that the B16 is number two to the B18c or the Jdm ITR Now I could be totaly wrong but that is what I think.

[Hondata8600]

according to that flowbench chart they are almost identical. I dont see why a b16 head would out flow a b18c head. If you are going to swap heads you may as well go with b18c1. It would prolly cost the same as a jdm b16 head anyhow.

I'm am used to k series motor codes, so I hope I got the B series codes correct :)

[jdm free]

do you happen to know which year heads were compared for this? ive been told by a couple engine builders that a stock gsr head flows better than a stock b16 head. but you can port a b16 head much more than a gsr head, making the b16 head flow more.

im not sure wat years they are, i just see this chart every so often on h-t n decided y not just post it up on here.


b16 heads usually can be found cheaper.


theyr not comparing intake manifolds just heads so essentially the i/m has no effect on this chart, atleast thats wat im guessing, but the gsr i/m was made for the gsr head so its probly the best to have when running stock internals

[CHR!S]

theyr not comparing intake manifolds just heads so essentially the i/m has no effect on this chart, atleast thats wat im guessing, but the gsr i/m was made for the gsr head so its probly the best to have when running stock internals

well you cant run any b16 or itr intake manifold on a gsr head, theyre completely different designs. id still get a b16 head because you can make it flow better in the longrun

[Hondata8600]

When two heads are benchmarked you do not compare intake plenums, this would not be comparing apples to apples. You may be able to port the b16 head more than the b18 head, but if the intake plenum is a restriction this will not make much difference - you may as well go with the head that can make use of a larger OE plenum.

[E-Money]

both heads got their advantages and disadvantages.

[na is best!]

hope this claifys some things


B16 (pr3 Stamp Code) Cylinder Head:
-The B16 head and Type-R head are of identical casts.
Both of these cylinder heads are stamped with the code PR-3.

-An ITR head is a ported B16A head from the factory. Both are coded as PR3 heads. So they are the same head but the ITR one (PR3-2) has had better intake valves, stiffer springs, bigger cams, bigger LMD's, bigger ports, steeper valve angles, some bowl blending work done from the factory.(IN OTHER terms, FLOWS BETTER, HOLDS HIGH REVS BETTER!)

-The B16 head flows SLIGHTLY better then the GSR head.

-B16 uses a single stage IM with different flange mounting holes than the GSR. You are able to find more IM to the fit on the b16 for this reason.

-B16 heads are easily obtainable and can be had for pretty cheap versus the ITR.

-The intake port approach into the combustion chamber is less vertical and directs the mixture motion into the chamber differently than the GSR.

-Ways To Identify:
* the green paint by the distributor
* thinner ITR intake valvestem (12% lighter vs GSR/Si)
* minor port work by the valve seat in the ports
* dual valve springs on both sides, notice yellow paint on intake side, blue on exhaust side
* lost motion assembly has a blue dot

Part Numbers for:

CYLINDER HEAD:
-b16 head:12100-P30-020
-Type-R:12100-P73-J00
-GSR:12100-P72-000
-JDM civic Type R:12100-P73-J00

GSR (P72)Cylinder head:

-The GSR head's ports are said to be "straight shot" or more vertical or steeper).

-lower head volume in the GSR head works well with dished pistons in FI applications whereas the ITR head's larger head volume works well in N/A high hp motors using domed pistons that fill in the volume.

-The head volume for the GSR head is at 41.6 cc.
-From EDYN:The GSR head has a larger ID to the intake seat than the B16 head which is intended to feed a 1.8 liter engine...We don't see the differences that some seem to believe exist, with the B16 head being more swirl oriented and the GSR leaning more toward tumble. On the all-out killer heads, our best head based on a B16 casing will outflow an equivalently prepared GSR by perhaps 5 cfm at .500 lift and that's not enough to cause one to out perform the other in the real world. The inside diameter of the seat (of an 00-01 ITR head) is also larger than that of a stock B16 head, allowing higher flow rates necessary to feed a 1.8 liter combination.
-The GSR is also has a DUAL STAGE intake manifold.
-the intake port is a larger with a steeper throat cut valve angle. It has less aerodynamic drag from having less internal surface area than the GSR head and GSR 2 stage IM.
[b][u]

[BCSpeed]

A ported gsr head will work much better on a turbo setup as a ported b16 head will work better on a motor setup.