Turbo Boost and FE

[GasSavers_Gollum]

I don't care what you guys say, turbos take power. They will ALWAYS create SOME restriction in the exhaust, unless we're talking about a setup that's design for very high RPM. This restirction will create backpressure and heat.

It's just like how adding a Catalyric Converter will decrease power and FE in most cars. Excess back pressure created for no reasons usually hurts a well designed exhaust. Adding a turbo to most cars is about the worse thing you can do for your exhaust step, but this is offset by the fact that most turbo specific camshafts have ZERO camshaft overlap between the intake and exhaust. This means that there wouldn't be any scavenging effects anyways.


Let's all keep in mind that most turbo setups on unmodified NA engines have LOWER FE, not higher. It's usually turbo varients from manufactures that actually get comparable highway miles, if not a little better. Usually these setups have comepletely different fuel tables, ECUs, sensors, and camshafts.