Emissions are identical, see more... (archive)

Once the forced air gets to the cylinder, the systems(exhaust wise) are completely the same. How the forced air gets there is different. Whether the WRX had an SC or turbo has nothing to do with exhaust set up. The suby would need that exhaust regardless of forced induction type.

This two biggest factor for in order SC is 1:cost, 2:simplicity, plain and simple. SC systems cost less and are simpler to install. You can get away with good power gains and not have to use an IC. Turbos almost always need a IC as the heat added to the intake is higer.

RussC

turbos are more effiecient by far than SCs. And can always make more boost. SC are primarily used now because of the exact reason you mention, cost.

I was under the impression that the reason SC's are beginning to be used more on OEM installations now is because of Emissions.

It is VERY difficult to get turbo cars to pass emissions requirements - view the WRX as an example:

Cat between manifold and turbo.
Cat between turbo and downpipe.
Cat in exhaust.

But, yes, Turbos are far more efficient then superchargers, especially the roots-type SC (eatons) that are mostly being used in OEM applications.

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Re: Emissions are identical, see more... Edward Smith 10:50 4/26/2002 (0)

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