A good chin spoiler, blocking air from getting behind the radiator, will
cause a vacuum behind the radiator, helping to pull the air through.
On the wide mouth TR3 specifically, you have the lower 1/3 of the
radiator not even in the air flow, (the section below the bottom sheet
metal within the grill mouth) so a chin spoiler will be particularly
effective.
Neat racers trick on a TR3 is to leave the hinge pins in the back of the
bonnet loose. The bonnet will lift at the back, providing some
additional cooling. Unfortunately, you'll need some pretty high speeds
to get that much lift. So..... Lower pressure pretty close to the
windscreen is right. The scuttle vent at the base of the windscreen
blows nicely at fairly low (40mph) speeds.
Jack, a TR3, a TR8, a Saab and a Subie
> -----Original Message-----
> From: owner-mgb-v8@autox.team.net
> [mailto:owner-mgb-v8@autox.team.net] On Behalf Of Paul
> Willoughby's Home
> Sent: Wednesday, August 20, 2003 6:22 AM
> To: Telewest (PH); James Nazarian; v8
> Subject: Re: was timing, now Engine Compartment Hot Air Exit
>
>
> Don't stop now gentlemen. This is an issue important to us
> all. I am dealing with it on my V8 TR3.
>
> I have always heard that raising the hood by the windshield
> lets the hot air escape. It was a common quick fix for
> Sunbeam Tigers so it's got a proven track record. However,
> many Chevy vehicles have the famous cowl induction hood,
> which is basically a 2 inch gap by the windshield that let's
> cool air in. It seems contrary to the raise the hood Tiger
> theory. Unless, of course, the cowl induction is ducted
> straight to the carburetor, which would use engine vacuum to
> pull the cool air in.
>
> I have added cut-outs to my inner fenders, exiting into the
> wheel wells. I have heard that this IS effective. Alas, the
> car is not running yet, so no details for you all.
>
> Anyone else have experience with removing heat from the
> engine compartment?
>
> Wouldn't a high CFM fan, force the air out, no matter what,
> for instance out the back, underneath the car?
>
> Paul Willoughby
> Torrance, CA
> 56 TR3 5.0L HO
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