On Wed, Jun 11, 2008 at 6:20 PM, Levi Pearson <[EMAIL PROTECTED]> wrote: > Given two gasoline-powered cars where the only difference was an > appropriately tuned turbo, and mpg was measured at cruise at the same > speed, I'm pretty sure mileage would be close to identical, for > reasons I discussed at great length. If you can provide data points > to the contrary, I would be interested to see them and hear the > explanation for the difference.
The data points were gathered in my 99 Passat on the freeway between St. George and Provo, a trip I've made _many_ times. All other things being as equal as possible (temperature, wind, etc) setting the cruise at about 93 (which placed the RPM range right where the turbo started to produce good boost, but a few hundred RPM below where the variable lift on the valves started sucking in _lots_ of gas) produced mileage over 35 mpg for the tank I filled in St. George and topped off on arriving home. These were the _only_ trips on which I achieved over 31 the entire time I owned the car. These trips I happened to have a good front door, so I went significantly faster than my normal freeway cruising speed of around 80. A normal trip I would yield around 29. I keep track of these things a lot. Drives my wife nuts. -- Alex Esplin /* PLUG: http://plug.org, #utah on irc.freenode.net Unsubscribe: http://plug.org/mailman/options/plug Don't fear the penguin. */
