Rb26 Head Flow Figures

[PLAYA]

better in what way? Ports are near identical

26 has more cam options ten fold
26 is solid factory
26 is top feed factory
26 has ITB factory

[RB30-POWER]

much and muchness really from what i understand with port size etc, although people like to argue about a bees dick sometimes, but if your got a hydraulic rb25 head, it's not an rb26 solid, so no comparison in that respect and to convert it to tomei setup, waste of money, when you could have started with the 26 head.

would never use a rb25 head myself on a half serious buildup, dicking around with vct delete, hydraulic lifters etc.

rb26, has better manifolding to start with and easy to access suitable cams on the market.

[charged]

better in what way? Ports are near identical

26 has more cam options ten fold
26 is solid factory
26 is top feed factory
26 has ITB factory

personally I wouldnt have a clue, its just what adam was saying, the engine he was tuning was a fairly mild engine in his words

[TK]

Actually, I beat it everywhere except higher lift on the intakes, by quite a bit on the exhausts:

My stock valve RB25 v's RB26 with 1mm os valves:

Intake
Lift Flow(rb26) flow(rb25)
.1 -- 81.1 -- 89.2
.2 -- 164.9 -- 172.4
.3 -- 232.2 -- 223.4
.4 -- 265.9 -- 257.2
.45 -- 272.7 -- 267.5

Exhaust
.1 -- 75.6 -- 76.7
.2 -- 134.9 -- 140.1
.3 -- 160.9 -- 185.4
.4 -- 173.8 -- 197.8
.45 -- 178.9 -- 199.8

Fuck yeah, gimme some 1mm os valves & I'll go 300+ easy on the intakes & 230-240 on the exhausts.

[PLAYA]

tony ill have the coin for the valves ti retainers and springs in about 2 weeks. I want to get you to show case your godly porting abilities on my 26, can u pm me a approximate price so ill have all money saved by time you are free again.