Part of the reason why you have more power then is the reason why dragsters
only start their car just before the line, and push the cars up to it.  Cold
engines make more power, as the air density is higher, and you have more air
to assist that extra fuel.  This won't help when the engine is warm.

    I do have an idea as to increasing the mpg, though.  I have long
considered buying one of those "tornados" .  SImply put, it is a non-moving
fan blade that you put in your air intake plenum.  As the air passes though
it ( with little if any restriction), it swirls the air around it, causing
the fuel to aerate (sp) better, and therefore increasing power and mileage.
I saw that the catalog, "The Auto Shop" which is run by Sears, but with
products from Eastwood Company (refinishing prod.s), and everything I have
ever seen in there was high quality.  I would like to get one for my car, but
finances are limited right now.  I have to get one running first.  :-)

David