Quote:
Originally Posted by pktzygt@yahoo.com
You think so? I've read of multiple people who have cone this swap. Everyone who has actually done it seems to have picked up at least a few MPG's.
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I know it seems plausible. 400lbs is a lot less weight. But I would bet these folks reporting MPG gains from larger engines did not rigorously test in the ABA format that would produce reliable measures of MPG changes. They probably just think the engine is the reason for their changes in MPG when in reality their driving habits changed, or their existing habits fit the BSFC mapping of the new engine better. Nonetheless, a good hypermiler will get better economy in your existing engine than in the one you propose to replace it with. Here's a
link that deals with these themes some more. My suggestion would be smaller engine, better hypermiling, and really good aeromods. The last option will increase your effective HP at highway speeds by reducing drag, which wastes HP. And really good aeromods will save you gas. As long as you don't stomp on the gas pedal all day!
