Phewww..
this is a long read.
After thinking about it I have deceded to do a budget RB30 buildup to put in my R32. I have some things i need clearing up before i buy the parts.
I am going to use the following
RB30E series 2 block with standard pistons, rods, crank
RB25DE head from an R32 frontcut (non VCT)
This should give me a compression ratio of around 8.3:1 from what I have been reading.
The other bits going in the build are:
RB25 sliding performance hiflow
splitfire coilpacks
stock manifolds from RB20
all ancelleries from RB20
FMiC
GTR injectors
RB20ECU remapped
Z32 AFM
I know the turbo is really a bit small for the RB30det and it will only nudge 250rwkw. that's fine with me its the torque i am after and I am a bit sick of revving the guts out of the rb 20.
Things I need to know:
1. The turbo is designed to run 18psi. is this boost pressure to high? I think it should be fine as the static comp of the RB20 is higher and I corrently run the same PSI on it. The last thing I want is to build it to find out it will not like running high PSI Of course I will be upgrading the valve springs to at least RB20 Items.
2. Will the Cefiro cross member allow the engine to sit low enough to close the bonnet? I do not want to have engine mounts fabbed if i can avoid it.
I will be putting the motor in myself but will be having all the assembly done by an engine builder.