Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB - View Single Post - Compression ratio 12.5:1. Bye-bye Super charger & Turbo build?

ryridesmotox · 11-02-2011, 02:48 PM

DI doesn't have any negative effect on boosting anything... At this point the 12.5:1 compression is pretty much the worst thing they could have done. It's going to necessitate one of 2 things... Either Meth/H2O injection or Ethanol or both. But even then I'm guessing that you are only going to be able to run like 8PSI... but you will get good power.

The only good thing about that is... the engine will have a fully forged lower end... It really almost has to... 12.5:1 at 8k rpm or however fast they want to spin this thing... it has to have a forged lower end

11-02-2011, 02:48 PM	#8
ryridesmotox Senior Member Join Date: Oct 2011 Drives: 2010 Chevy Cobalt SS, 59 Ford F100 Location: Carlsbad, Comi-fornia Posts: 127 Thanks: 0 Thanked 0 Times in 0 Posts Mentioned: 0 Post(s)	DI doesn't have any negative effect on boosting anything... At this point the 12.5:1 compression is pretty much the worst thing they could have done. It's going to necessitate one of 2 things... Either Meth/H2O injection or Ethanol or both. But even then I'm guessing that you are only going to be able to run like 8PSI... but you will get good power. The only good thing about that is... the engine will have a fully forged lower end... It really almost has to... 12.5:1 at 8k rpm or however fast they want to spin this thing... it has to have a forged lower end __________________ 2010 Chevy Cobalt SS Treadstone Performance Stage 3 kit: CAI, Charge Pipes, TR8 intercooler, Maf Relocate, 52MM Turbosmart BOV, 3 inch catless downpipe, 3 inch catback, borla XR1 muffler, Exedy Hypersingle, TWM short throw shifter, 24PSI HPtuned by Terminator2 on E85/91