Rb20det Problems

[super_s13]

Hey guys as most of you will know i am putting a rb in my s13 the mech had alot of trouble getting it running but now it seems ok i just worried bout my compression...

I have ben told they have around 150psi although mine only has 100psi in all 6 cylinders so yeah i have a thicker head gasket (metal) would this be the prob the mech says it will be ok because they are all at the same psi so yeah is this to low or not...

Also i have a VG30DET turbo on the rb20 at the moment and am only running stock boost till engine and clutch is run in 7PSI although i have 3'' cooler piping and front mount 600/400/100 i think but its very laggy in a sense that you can hear the turbo start spooling at aroung 3100rpm but nothing happens till 4800rpm could this just be a case of lack of boost with the cooler and piping and will the problem go away after i boost it to 14.7psi after run in Thanks in advance

[Fixxxer]

100psi does sound low, but they are all the same.

The RB20's already run a lowish compression (8.5:1 I think) and the thicker metal head gasket is lowering that even more so it will seem very laggy with a big cooler on there. 14.7psi will go a lot harder

Fixxxer