Mark,
??????? 10 years ago when I was running mine on the Arizona portion of RT. 66
during the early summer I experimented a bit and found that cracking my hood
open about 2" would drop the temperature about 15-20 deg against an ambient of
around 90-95 deg. I also blocked any holes in the radiator support that could
be leaking air and creating a flow problem around the radiator. My radiator
then and now is a Ron Davis Racing products aluminum unit.
Best,
Jeff Hefner
B9470028
-----Original Message-----
From: CoolVT@aol.com
To: tigers@autox.team.net
Sent: Sat, 23 Aug 2008 10:08 pm
Subject: [Tigers] Hood scoop and cooling holes
For some time I've wanted to experiment with different scoops and cooling
holes in a hood. I've never wanted to start hacking up my original hood. Now
I've acquired a proper square corner Alpine that I can play with and not feel
guilty.
So, I'm thinking that there has to be something better than the LAT hood for
cooling. I'm trying to remember back to some of the information that been
passed on about this subject. If I remember the information correctly, the LAT
scoop will not really bring in much fresh air because it's at a low pressure
area of the car. It might help more as a means of releasing under hood hot
air.
I don't know what the pressure area is where the hood meets the cowl in
front of the windshield, but if I leave my hood propped open about an inch I
don't see much difference at all in engine temperature. So it makes me wonder
how
much air is escaping.
I'd like something that doesn't look too outrageous, but still might help in
cooling. My thought has been a scoop about twice as wide at the LAT, but
maybe a little lower....resulting in about 50% more open area. Also I'm
wondering if an almost equal sized hole at the rear of the scoop would help.
Seems
like I remember from science class something about the Bernoulli (sp?)
effect. Air coming in the front of the scoop and passing out the rear would
create a low pressure inside of the scoop and suck air out of the engine
compartment? But, if the front of the scoop is really a low pressure area,
how
much
air will really pass through?
So, if you were starting with a clean slate and a hood that you weren't
worried about and still wanted something that looked sort of period correct,
what
would you design that might help in cooling?
Mark L
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