well. i'm building an RB30DE in N/A trim that I'm using an Rb26 head to make.
It's going to the machinist on Monday.
I'll let you know what's involved.
but so far it's 800 for my RB30 block. 2100 for a blown RB26 that I'm pulling all that I need from (sensors, itb's head, cams, ignition parts, etc. etc.). It also comes with a pair of HKS cams and cam gears on the side (so 4 cams total).
and 900 for Spool RB30 rods. probably another 1200 for pistons. 300 for bearings. 1500 for machining.
and then i need a transmission and engine management and water/oil pump and some other misc bits... another 1000
RB30 building is not cheap. But I'm sure it will be fun.
I actually might sell the 4 cams and get 2 really long and high cams to make some real power.
in reality, for an RB30DE (without a turbo setup) of this magnitude, you're looking at 8 to 10k Canadian.
In regards to turbo, my engine here could handle well over 650 - 700 hp. But then the oil pump and all that start to become a problem. as well as fuel delivery, and ignition strength.
anything over 600 is where it really starts to add up, and we haven't even talked about clutch or flywheel assemblies, and the 1000 dollar oil pumps required to feed the engine.