James - once under way I would have thought that incoming air pressure would
have forced the exit of hot air anyway it could, like from the bottom even
though that is contrary to normal convection, and this is indicated by the
temp gauge going down and staying down once underway again after a stop.
While stop even the chronically inefficient factory fans have enough oomph
to blow air out from under the arches, and I don't have the RV8 cutouts in
the inner wings. However I have wondered about cutting holes in the
box-sections that go from the holes at the top back of the inner wings to
the A-posts, either into the cavity behind the splash panel with another
hole in that (which will probably just allow water and dirt to fill up the
space behind it (or direct into the arch area. This would allow an air flow
at the top back of the engine compartment which as you said before is
largely stagnant air.
As far as bonnet pressure goes I have noticed that it tends to *lift* at
speeds over 55mph, and there have been several posts in the past about the
bonnet wrapping itself over the screen at higher speeds when the catches
have failed. E-Type Jag louvres seem to extend forward from the base of the
screen slightly *less* then the height of the screen. It would be
interesting to tape some wool to various of those and see which way the
airflow goes at various speeds, and it would also be interesting to tape
some to the unlouvered MGB bonnet at various points along its length and
across its width.
----- Original Message -----
From: "James Nazarian" <jhn3@uakron.edu>
To: "Telewest (PH)" <paul.hunt1@blueyonder.co.uk>; "v8"
<mgb-v8@autox.team.net>
Sent: Wednesday, August 20, 2003 6:32 AM
Subject: Re: timing
> Paul, I was rereading your post and I have another question for the list.
> It occurred to me at some point that I have plenty of air coming into the
> engine bay but I don't think that I have much going out. ...
>
> ... This would also rule out any form of louvering the bonnet as it will
nearly
> all be in high pressure air.
///
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