seal cowl induction?

[PaulL]

Don't know where you read that, but that couldn't be more wrong. At speed, there will be LOWER static pressure across the hood, creating a vacuum effect that will pull the air from the engine bay out through the duct.

I agree. I have a Seibon hood and 2 problems we have identified are 1. I can fit my hand between the cowl and weather strip by the wind shield and 2. the rear vent is an intake, so at speed causes the pressure in the engine bay to rise. This means that the fans can't pull any air through the radiator. Even in neutral the temperature doesn't start to fall off until my speed drops to say 40 mph!

The first problem may not sound like a problem until you realise that the air by the cowl reverse flows back into the engine bay rather than going up and over the car. You can test this quite simply by taping a few short lengths of wool to the back edge of your hood and watch to see if they get sucked towards the engine or up the screen whilst driving.

post #14
http://www.3sgto.org/f13/overheating...rs-6158-2.html

That's not the only time I have ever read about this either. I have read that the bottom of the windshield contains the most pressure, and the easiest place for the pressure to dissipate is through the rear vent. I've never tested this myself, but I have read a lot of articles about this.