Reply to "Turbo Hats for Speedy"

@Stan Galat posted:
So - out of curiosity (and because I'm an engine math geek), I went down a wormhole tonight.

I love it when that happens!

I'm kinda amazed that anyone would assume extra holes or a popped deck-lid would let any air out. Both the fan and the engine are working overtime to remove air from the engine compartment, and the result would always be a negative air pressure there. I can't see the negative pressure created behind the car ever exceeding the negative pressure in the engine compartment. If it did the engine would stop running!

I remember seeing an article about a 356 G-production racer many many years ago. He had to follow SCCA rules about ducting, scoops and stock appearances and found a loophole. He used the right side headlight bucket and ran a straght tube all the way through the passenger compartment into the engine compartment to supply cold fresh air. I'm not sure how effective it was (duct size, length, friction) but it was clever!

1/18/2310:00 AM

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