Well said. (No arguments from me.)
Only item...on removing the rubber flap, the cooling potential isn't altered
and the actual intake air temp was reduced by about 18 degrees.
- Bernd
> Dont forget, the less air that is forced through the radiator, the less
cooling the
> radiator will do. It is true that you can re-route air around the radiator
to make
> the enging compartment cooler. But this will make it hard for the radiator
to work
> properly.
>
> The best way to keep the intake temp cool is to relocate the air filter
outside the
> engine compartment. Why do all these companies make $200 + kits which
position the
> air filter inside the engibe bay? I have always made my own intake systems,
and
> put the filter as low and front as possible.
>
> Another thing to think about is air always flows from high pressure area to
low
> pressure area.
>
> If you want to see what the serious people are doing (and by serious, I mean
the
> guys who are running nine and ten second quarter miles, not the guys who cut
holes
> in everything and run fifteen and sixteen second quarter miles) take a look
at the
> Spoon, STR, and other drag cars and pay attention to the air _outlet_ vents
at the
> rear edge of the front wheel wells, as well as the air _outlet_ on the back
side of
> the radiator on the hood.
> These people have learned that the secret to increased cooling and cooler
running
> engines is to get the air _out_ of the engine compartment more efficiently,
not
> rerouting air around the radiator and cutting holes, adding ram air hoods,
etc...
>
> Cowl hoods are the only way to go for cooling the engine compartment IMO. If
you
> have a ram air hood, you better have it sealed and connected to the intake to
avoid
> raising the air pressure under the hood.
>
> Hope this helps!!
>
> --
> -=Mike Kuriger
> 1991 Isuzu Impulse RS 1.8
> 2000 Dodge Durango SLT 4x4 4.7 (cowl hood soon!!)
>
>
> bernd@texas.net wrote:
>
> > I'm not trying to sway you away from the custom hoods (they DO look good on
our
> > trucks) and I did notice a 15 degree drop in underhood temperature from my
Cowl
> > Hood.
> >
> > Fortunately, someone else from the list has proven a good way to reduce the
> > intake temp with a intake tube by removing the rubber flap next to the
radiator
> > (passenger-side).
> >
>
>
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