Originally Posted by
Stewi
First off, He's jerking you around if he meant that seriously. Steel is super cheap. A block of steel big enough to cut that spacer out of is about $60-70 at most, maybe $150 if its stainless. Then maybe another $200-$250 to cut it so your talking $400 max. You could probably have anyone who makes 4G63 exhaust manifold flanges to cut you one since they would already have a CNC program to cut it, all they would need to adjust is the material thickness values in the software, the other variables would be the same.
Secondly. AWESOME Setup! It looks really clean and well thought out.
What type of stage 3 cam is that RPW? Isnt it made for turbo? Typically a more aggressive cam will cause the car to make LESS vacuum at idle. When I switched out my HKS 272's for GSC S2's my vacuum went down about 3-4mm/hg. It could be possible your cam timing is off a bit, aftermarket cams should be degreed using a degree wheel for precise accuracy. I know from other users experiences on EVOM that the GSC's need to be about 4-5 degrees retarded to be at their true " 0 " mark. I installed them normal and was pulling about 21mm/hg and after I retarded them to -4/-4 I was at 18mm/hg