compression decision

Originally Posted by Rid3_FaM0uS

Hey guys im looking for a little bit of insight from those of you whom are a little more forged internal savvy than I. I am trying to figure out what will be my best route as far as a compression change for my block goes. I'm looking to finish my Z right at 800 whp so, I would like to pop the question of 9:1 or 10:1 I guess is as basic as I can ask it. I've been doing some forum crawling here(though now as I type this it never dawned on me to maybe check the 350z forums) and haven't seen anyone provide some real solid(per say) numbers as to when running 10:1 is no longer a good idea and bumping back to 9:1 is the best option. Also while I'm here if someone is good with compressor maps im looking to find out at what point my stage 2 GT2860RS w/ .86A/R will be maxed out psi wise on e85 at both 10:1 and 9:1(I would think in theory these compression differences would change those numbers as it will take more boost to produce equal power from the 9:1 stand point. correct me if I'm wrong though! I don't claim to know it all lol ) thanks Z brothers!