Ported Rb26 Head Required

[tacker]

lol now ya tell me!

yer as i said i was just to heavy handed utterly my fault

[Duncan]

love that cutaway pic.

there was some interesting info in last issue of race magazine about taking an internal cast of the port to see how smooth the shape is

[tacker]

well i can tell you just a clean out has to improve flow over the rough arsed factory job

Second attempt was done today 16 straight hours worth muttering dont f#$@ this one up, so off to have new valve guides inserted tomorrow.

[The Mafia]

those cutouts are really awesome, thanks for that.

[Richieb]

""""""love that cutaway pic.

there was some interesting info in last issue of race magazine about taking an internal cast of the port to see how smooth the shape is""""""

Exactly..!!, thats the way to get identical-ish ports.

Aaaaanyway Tacker, ya had the nuts to have a go, sometimes it goes wrong, but good one mate all the same, I been there too.

Cool idea the cut-away, nice one.

[Lithium]

Very nice pics, and bummer to see it went wrong first time - gotta gut you.

I was sure I've heard that unless you're going mental with it, theres no point doing any more than maybe a basic tidy up of the ports - no reprofiling or anything as they're so good stock. I know not everything you hear is true, but sure that I've heard that its not uncommon for RH9 cars to not have had any work done to the ports on the cars - just big cams and whatever is needed to fit them and actuate the valves correctly.

[tacker]

not quite true there is a lot to do just to clean up the rough factory job, i found steps in the intake port just under the valve seat of over 1mm in depth.

Then it goes into inner radius for the intake and outer radius for the exhaust etc. There is quite a bit you can do on the intake to reprofile and enlarge the exhaust ports.

but if what has been done this time gives me a10 to 15% increase in flow i will be well chuffed.

pics tonight of finished head

[Duncan]

hmmph if you think factory is rough on a gtr, check out a commodore head one day

[tacker]

lol yer ok but it was rough and thats why i went to far the first time

[sky30]

im intereted to see pics of the new head with the port job.

[tacker]

yep as soon as it comes back from having the new valve guides done i will take a snap

[The Mafia]

hey mate, can you port the new one perfect, and then cut it up and show us what a real port job looks like?

lol

[Duncan]

lol so I wasn't the only one thinking that!