Bill,
The purpose of an intercooler is to improve volumetric efficiency. Since the
air/fuel ratio is about 15:1, that means primarily the amount of air you can
stuff into the cylinder. The temperature of the fuel is nominally only 1/15
as important. Also, the discussion here is fuel efficiency not power, which
are not usually optimized simultaneously. Again, I point to the specific
example of the Honda 1.5L engine. Better fuel efficiency was obtained by
using fuel temp of 180F and air 158F.
Does anyone have experience with the change in gas mileage by just blocking
the intake manifold heat riser? I wouldn't be surprised if blocking the heat
riser dropped the fuel mileage by 25%. On the other hand, more heat isn't
likely to improve mileage by 25%.
My $0.02
Bob
-----Original Message-----
From: New Mexico Books [mailto:newmexicobooks@bacavalley.com]
Sent: Tuesday, October 15, 2002 3:19 PM
To: tigers@autox.team.net
Subject: Re: Fuel vapour, non tiger
FYI All: Heating fuel to improve vaporization reduces power available from
the
fuel charge. This is reason that supercharged/turbocharged engines have an
"intercooler" to cool the charge before it enters the combustion chamber.
Pull
up "intercooler" on the net for more info. Cheers...Bill Carroll...
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