Hey, this whole DOHC, SOHC thing, I don't know... SOHC making 504kW at the wheels isnt so bad, to my way of thinking.
RB30E heads are prone to cracking mainly in the VL's. VL's standard were released with small radiators, Aircon models have a thicker core, not to mention if you bleed the airpockets from the head you should be fine.
I find, much like a point made earlier, that the SOHC is a cheaper, easier and to me the smarter way to go, especially if we are talking drag application, I mean, they make the big power. You can make the head bolts bigger if you like, build it strong, spew boost down it and hold on. These engines are really not given the credit they deserve. Much like the heads.
Im not here to tread on anyones toes, nor can I really say I have the "real world" experience to argue, but when the results are there to be seen, why argue? hehe. I admit it is a pity head work costs so much, but $4 flapper wheel is all ill need for my polish and as for porting tools, I have my fair access to those.
I have a stock rb30e atm, Im experimenting with a td04l from a 2L wrx engine bolted straight on, I feel safe the injectors, AFM and ECU etc will cope, im more concerned about chocking my exhaust. Small boost, standard compression, running Premium Unleaded with a real nice polish.
Any views on this idea are appreciated.