rb26dett valve/port size.

[Cubes]

Recently I've heard from a few people that the ports and valves are bigger on the rb26 head compared to the r33 rb25 head?!?

From the r32 RB26DETT head i've seen the valve sizes were ~35mm for the inlet and ~29.5mm for the exhaust.

From what I've seen the ports are the same size/design as the R33 rb25.

The only difference with the head is the different cam specs and the solid buckets.

Any 1 care to clear this up for me with first hand experience or knowledge?

[N I B]

RB25 and 26 have very close to the same flow on a flow bench but a 25 head is slightly bigger in some areas.Both heads work very well.

[Cubes]

So the ports are the same cast if you like?!?

Valves are the same size?!

Thnx Steve.