Compression Ratio and Forced Induction
Today I was laying out a plan for turbocharging my G8 V6. Finding the right parts and installing the turbo system does not seem like that difficult a process, but I have a question that could make or break my plans.
With a stock compression ratio of 10.2:1, how is it possible to run any amount of boost without having to run with racing gas or higher? I know some people that run 6 to 9 psi on C.A.P.A Raptor Superchargers and can still run on pump 91/93 octane. From my calculations though, running that much boost would shoot the compression ratio far above a "safe" 12.0:1. (About the max for pump gas, so I have heard). Anyways, there is no way I am going to buy lower compression ratio pistons for the V6 just to turbocharge.
How is it possible to run 6-9 psi of boost on the V6 Alloytec without blowing the engine immediately? I know tuning is necessary and will help with preventing knock but even with a tune if your compression ratio is to high it wont matter anyways.
I have everything else pertaining to this subject basically understood but I can not wrap my mind around this one.
Godspeed my friends.
Current Upgrades In Order Of Installation:
12mm Intake Manifold Insulators (MACE)
K&N, Cold Air Intake
20% Underdrive Power Pulley Kit. (Powerbond from MACE)
Possible Future Upgrades. (Suggestions Welcome):
Ported Stock Exhaust Manifolds. 76mm Throttle Body. Ported Intake Manifold. Tune.