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Selling my RB26, was built as a full-on item for a 1200hp motor. All work was done by RAMS head service in Windsor, they were responsible for GTR-700's head initially and learnt alot about RB heads from JUN - and were getting better results than them as well.

Parts list:

Custom 1mm oversize stainless valves (when I got the head done in 2004 off the shelf items were not available, made from Ferrea alloy blanks)

Aftermarket valve guides

Apexi V-Max SPL springs, retainers and buckets

Apexi V-Max SPL 280 degree 11.5mm lift cams (also have Tomei 290/11.5 and HKS 300(?)/11.5 cams as well)

Tomei camshaft stud kit

Trust cam gears

New stem seals

Also have ported injector base/manifold to suit head

Labor list

Ported intake + exhaust runners

Profile guides

Polished + cc'd chambers

Unshroud valves in chamber

Flow benched and runner flow equalised

Steam hole modifications/water gallery modifications

Clearanced for high lift cams

Drilled for 1/2inch head studs

Flow figures:

Lift Int Exh

0.05 51.9 46.4

0.1 100.4 94.5

0.15 147.2 134.8

0.2 186 167.5

0.25 221.3 197.2

0.3 252.4 219.5

0.35 277.5 229.7

0.4 292.9 236.8

0.45 304.7 240.8

0.5 309.2 241.8

Have spent over $10,000 on this item (RAMS alone was $5500 with no parts) , had some big plans for my R33 but have gone a different route now. I also have a Harris Engine ported head here too (same people SydneyKid uses and raves on about) and it is nothing compared to this RAMS head.

Benefits of having such a modded head are quicker turbo spooling (or capacity to spool a larger turbo reasonably), more power(!!!) and to a degree lower intake temps (due to less boost needed to make xyz power figure etc).

$8,000 or near offer, located in Sydney. Item is still unused, have mocked engine up a few times for clearancing/ ricer pictures but that's about it.

Couple of pics of the head, 3rd pic is of the ported intake against a standard head to show how much material was removed on the ports.

post-4735-1174713405.jpg

post-4735-1174713439.jpg

post-4735-1174713506.jpg

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https://www.sau.com.au/forums/topic/161673-rb26-race-head/
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