Ram Air Hoods

[MulletMan]

I'm building new RAM air hoods for Z28's and need some opinions.

This hood has a NACA type duct that feeds into the airbox. It's a pin-on and weighs about 10lbs. My car seems to pull harder above 65. I'll get some timeslips to see if it works.

I'm making a few more hoods that have a raised scoop feeding into the airbox. I'll start making bolt-ons if I can create a nice looking design that adds power.

[KnightFire]

These hoods work with OEM equipment as well as pin in?







KnightFire

[Injuneer]

Just to keep things in perspective, "ram air" effect can be calculated from "velocity head". It can be demonstrated that at 100MPH, the maximum possible ram air gain is about 1%, or 3HP on a stock engine. At 65MPH, that gain drops to about 1HP.

Additional gains are possible due to the air being colder than air pulled from under the hood, or close to the hot asphalt.

[MulletMan]

You're right. I'm hoping that the cooler air helps with power. I think that direct flow describes it better.

[Joe 1320]

I like the look, but I feel that most people would want a slightly heavier design that wasn't a simple pin on. That's great for racers, but not the greatest for street.

[Injuneer]

I prefer the direct approach too.....





Would definitely like to find a 10# pin-on version of the Ram Air hood.

[MulletMan]

Injuneer, I like that. It looks like it seals tight. Have you seen an increase in performance?