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<x-charset iso-8859-1>OK, Does the Berg semi-Hemi breath better than a stock head? Keith > Well, I kept the previous discussion limited to the wedge chamber only. > > Power is made in a few ways. One of them is thermal efficiency. > Another is volumetric efficiency, i.e. "breathability." The hemi > heads can flow much more air than a wedge. Although thermal > efficiency does drop (lovely gas mileage on those muscle cars :-), the > gain in breathing offsets that for more power. > ------------------------------------------------ To unsubscribe, E-mail to: <type3-off@vwtype3.org> For more help, see http://vwtype3.org/list/ </x-charset>