Hey A,
thanks for the long reply, i like the way you think. As far as cash goes im not loaded but if a part can show its merit ill more than happily get it.
The car is aimed at circuit only. Im trying to build basically a rwd gtr with more capacity/torque, lighter weight, the 6 throttle bodies etc. Then see how much i can mix it up with the gtr's in the dry. Obviously in the wet its never going to happen
Looking at atpturbo.com it showed that i could get the GT3076R with a split pulse exhaust housing, is this what you mean by twin scroll? My next problem then would be finding a good split pulse top mount manifold if that was the case. EDIT: turns out i was making it up, the split pulse housing is available only in .78 rear, too small for rb30 id think.
As far as cams specs go i have no doubt what you are saying about the low pressure stuff, but wouldnt real world results of rb26's fitted with high mounts come into play here. And yeah im sure there are a lots of shit single turbo rb26 combo's but try and think of the good ones like the saurus and garage katogani gtr's
Also about the cam profiles, its not a big issue to get a set of aftermarket cams. I dont know heaps about cams but figured if they were for a rb26 round 256 deg and 9mm lift then, they would be basically the same as a rb25 pair with the same specs.
My biggest reason for wanting a single is to remove compromises in the twin turbo system, that is being able to have an external gate, better dump pipe design etc. The fact that i have a rb20 pfc that only allows one afm and 02 sensor also weighs in.
Maybe i should get a gtr loom, gtr pfc, another afm and 02 sensor and throw a pair of those 2530 garret equiv's everyone loves on there. However this might be the easy way