[Shortie771]

I recently read a thread about somebody wanting to increase their compression ratio for improved FE and in it another member suggested something about doing an Atkinson regrind on the cam. I have tried reading up on it, but it left me with nothing but a headache and ran into a lot of debates on Atkinson vs Miller.

I am also interested in increasing the compression ratio on my D16Z6 for better throttle response in the low end and increased FE. I just don't want to increase compression to the point of having to run higher octane fuel, because that kind of defeats the point of getting better FE if I will just have to pay more at the pump. Anybody know what the limit might be on that, without engine knock or retarding the timing? I was thinking about 9.5:1 or 10.0:1 vs my stock 9.2:1.

1) How high of CR can I go without having to run higher octane or retard timing?
2) Could somebody dumb down how Atkinson/Miller setups work and the advantages or disadvantages to them?
3) Would the Atkinson/Miller setup work well with increased compression?
4) Would I even be able to do this with my engine? (pretty sure I have VVT)

Sorry, I know I am kind of all over the place here. Just a lot going on in my head.