At 07:01 AM 5/13/96 -0600, you wrote:
>Item Subject: cc:Mail Text
> The Tiger finally emerged from hibernation yesterday, and the
> shakedown cruise was also used to test the theory about raising the
> rear of the hood to get more airflow, as we discussed a few months
> back.
>
> The hood was lifted by placing a 2" roll of duct tape around the
> latch. Tufts of yarn were spaced along the resulting opening, so that
> airflow direction could be tracked. The car is basically stock, with
> the stock fan, shroud, engine, air cleaner, etc. The horn openings
> are not blocked.
>
> Observations:
>
> At rest, just goosing the throttle a bit, produced a noticeable
> airflow out of the gap. Turning on my electric fan at idle did not.
>
> At highway speeds, the center area, about the width of the stock air
> cleaner is turbulent, but I really couldn't say that there was much
> flow in or out. From there outwards, air is just pouring out along
> the back and up the sides. One of the tufts about six inches up the
> side appeared to blown straight out, at 90 degrees to the direction of
> travel.
>
> So it appears that you do get more airflow by raising the hood.
> Perhaps the center should be blocked off for the width of the air
> cleaner because the flow there looks questionable. Still unanswered
> is the main question: Does this added airflow help the cooling? It
> was about 50 F when I was doing this, so nothing could be proved.
>
> Stu Brennan
It sounds like the LAT hood may be a good design, with its outlets
at the
corners. Perhaps someone with an LAT hood could do a tuft test someday. Did you
notice if the air from the interior vents or the heater was warm or odoriferous
from the exhausted engine heat?
Doug Pruitt (301) 975-6419
Maryland
Zort!
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