TRBOMP5

Ok, I have a machine shop that has done alot of work for me (my header flange, turbo in and out flanges, downpipe to stock exhaust flange) plus an assload for my work. I talked to him about making a head spacer to lower our compression to whatever we wanted it to be. I heard about this from a Civic guy, and also there is a write up in European Car (sorry japanese guys, but I got the S4 too) about a BADASS GTI that has it done to it too.
Basically you just pull off your head and sandwich this between 2 headgaskets. and voila 8.5:1! (or whatever)
He said if I bring him a head gasket he could make it from that. But it will probably be a chunk unless I can get a pretty good size group buy going (maybe 10 plus)

Ok but here the questions start:

1: Does anybody know all the specs on our cylinders to come up with the proper thickness to lower it to the right compression? (dont forget to add in for the extra head gasket)

2: What all else do you have to do because you've lowered the compression?
(I'm sure just a little tuning on your Stand Alones for all you lucky asses with them)

3:What is the sugested material it should be made out of?

midnightblue97

I have a couple of better suggestion.

Lower compression pistons.

Take some material out of the combustion chamber

shave a little bit off the pistons.

In all reality, the stock compression ratio is more than low enough to support enough boost, with proper tuning (which is really the only thing that will keep your set up reliable in the long run) to make grenades out of your internals long before you will have a need to lower compression.

UCSBgeek

Yeah, if you read Maximum Boost it says pretty clearly the sandwich headgasket thingy is pretty iffy