Bob said: (quoted from post at 13:55:39 03/27/08) There used to be all sorts of gizmos that swirled and did this and that to the fuel MIXTURE after the carburetor, SUPPOSEDLY giving better mileage. Nowdays, the gasoline is injected just before the intake valve (actually sprayed AT the intake valve by each fuel injector).
What the hell good do you suppose it does to swirl the AIR ahead of the throttle plate(s), LONG before the fuel is even injected, does to improve gas mileage?
HOW do you figure "spinning" the AIR before the throttle plates has ANYTHING to do with how the air/fuel mixture will mix AFTER the throttle plates, AT the intake valve area?
While we'e at it, can I interst you in some "ocean front property" in Arizona???
Now they are even coming out with direct injected cars too, where the fuel is spayed directly into the combustion chamber like a halfway modern diesel.
I did put true duals on my pickup and it downshifts less on hills (I drive the same route on the highway quite often) and feels a tad snappier but I didn't see much difference on milage. My old muffler resembled a 20 gallon drum and couldn't have done much for moving the exhaust down the line.
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