Rb26 Head Internals Into Rb25 Head

[turbo87]

Have heard of some people running the RB26 head set up in an Rb25 head and was just wondering where the best place was to find the parts and get this done.

[Sydneykid]

Have heard of some people running the RB26 head set up in an Rb25 head and was just wondering where the best place was to find the parts and get this done.

A few years back I upgraded an RB25DE cylinder head. I bought the RB26 parts (valves, valve springs, collets, retainers, followers etc) used on the For Sale forum from one of the heaps of guys who upgrade their standard RB26 stuff. Cost was around $600 for the bits. Then it took a few hours to fit it to the RB25 cylinder head, regrind the valve seats, new seals and gaskets. Plus we ported it, matched he combustion chambers volumes and polished them. The labour and parts cost would be been around $900.

Wouldn't bother doing it again, cheaper to buy a used RB26 cylinder head complete and sell the RB25 one. The new RB31DET (below) has an RB26 cylinder head for that reason.

cheers

[Roy]

But the question is, it may be worth it if you already have the hoo haa that bolts to the head, Exhaust mnaifold, inlet manifold etc.

So the question it, does it make any more power?

[turbo87]

I was thinking along the lines of more revs as well.

At the moment ive got all the bolt ons but the head is fairly std with valve float on anything over 7000rpm.

For a $900 upgrade it may make sense for me, who would be capable of doin the work?

[turbo87]

bump,

who could do this work?

[MR331307]

Your from WOLLONGONG i see

TAke it to HB sales in Fairy Meadow

I got my head done there

and am getting the same conversion on another head there to

And there fairly cheap

ill get the number for you tomorrow

[2rismo]

Aaron Hambridge at APM in Albion Park - Next door to Steve's Speed Shop (next unit over).

VERY switched on guys!

Adrian

[GTRgeoff]

Or just source a NEO engine or head............

Seriously, by the time a lot of these mods are completed an RB26 swap would be cheaper.