Ram air or cowl induction?

Both are going to be better over stock.

And seriously man!?

Hoods are all about the looks! :shigrin
Pick the one you think looks cooler. I'm going... COWL!

I'm thinking the drag (wind resistance) I get from my hood overshawdows any gains I get from the ram air (which is ported right to the CAI), and there's a hit to my mpg. But I continue to send people to the chiropracter as they twist their heads for one last look! :gringreen

I think ram air over cowl as it directs the cool air right over the air intake. These are cold air induction hoods, not ram air. There is no ram air effect. As was said above...any hp gains are negligible...it's all about the looks. That said, consider the cowl induction or even a stick on hood scoops if there's one you like. You'll save big bucks.

Well, I have a carbon fiber ram air, that I just listed for sale in the classified section (sorry for the plug!), but I just bought a cervinis 2.5 cowl hood that is being painted top and bottom...

Hope to pick up the cervinis hood this Friday - I will get some pictures up.

As for the benefits of one vs. the other...I have a CAI and noticed no difference with the carbon fiber ram air.

Ragnar said:

I think ram air over cowl as it directs the cool air right over the air intake. These are cold air induction hoods, not ram air. There is no ram air effect. As was said above...any hp gains are negligible...it's all about the looks. That said, consider the cowl induction or even a stick on hood scoops if there's one you like. You'll save big bucks.

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Thanks guys for the input. I know these aren't true ram air hoods,but that's what they call them. I'm thinking a cowl hood would reduce the drag on the car a little and reduce the temperature under the hood. I love the look of both types of hoods. I think I'll go with Cervini's 2.5" cowl hood.

A raised cowl definately gives the car an aggressive look. I'm sure you'll like it. Now you have to consider hood pins. These aftermarket hoods tend to float in a strong headwind or at high speeds. Also beware of hood struts. They tend to bow fiberglass hoods when closed so I don't recommend them.

Ragnar said:

A raised cowl definately gives the car an aggressive look. I'm sure you'll like it. Now you have to consider hood pins. These aftermarket hoods tend to float in a strong headwind or at high speeds. Also beware of hood struts. They tend to bow fiberglass hoods when closed so I don't recommend them.

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Thanks for the tips. I don't want hood struts. I like the looks of the Shelby style hood pins.
I hope they work with a fiberglass hood.

Superdave7 said:

I'm thinking the drag (wind resistance) I get from my hood overshawdows any gains I get from the ram air (which is ported right to the CAI), and there's a hit to my mpg. But I continue to send people to the chiropracter as they twist their heads for one last look! :gringreen

Click to expand...

:thumbup::drool::drool::drool::drool::drool: :thumbsup:
Nice hood! I don't think I have seen a ram air hood with heat vents.
the Trufiber GT-S hood is now on my wish list.

A_STANG_THING said:

Thanks guys for the input. I know these aren't true ram air hoods,but that's what they call them. I'm thinking a cowl hood would reduce the drag on the car a little and reduce the temperature under the hood. I love the look of both types of hoods. I think I'll go with Cervini's 2.5" cowl hood.

Click to expand...

AST - I'd definitely recommend checking out Steeda's and Trufiber's cowl induction hoods as well. I'm gonna go with the Trufiber 2" cowl induction hood. :drool:

Stage 3 Motorsports 2005-09 Mustang Steeda Street Hood
Stage 3 Motorsports 2005-09 Mustang 3" Cowl Heat Extraction Hood
Stage 3 Motorsports 2005-09 Mustang 2" Cowl Heat Extraction Hood

(My favorite is the last one )

Preston951 said:

AST - I'd definitely recommend checking out Steeda's and Trufiber's cowl induction hoods as well. I'm gonna go with the Trufiber 2" cowl induction hood. :drool:

Stage 3 Motorsports 2005-09 Mustang Steeda Street Hood
Stage 3 Motorsports 2005-09 Mustang 3" Cowl Heat Extraction Hood
Stage 3 Motorsports 2005-09 Mustang 2" Cowl Heat Extraction Hood

(My favorite is the last one )

Click to expand...

Some guys said their trufiber hoods needed alot of prep work. I'd rather pay a little more for the hood than a lot at the bodyshop.

ram air or cowl induction



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I can tell you this: When I clean the air filter off of my CAI, the only portion that gets visibly dirty is the top part which faces the opening from the cold-air ducts. I don't know about HP gains, but I can tell you with certainty that the air my car breathes is NOT from under the hood; more so when you are driving even at slow speeds.

cervini cowl 4inch, but I would not go any higher than 3 inch for regular street use

I have further evidence the ram air inlet under the hood directs cold air to the air intake, resulting in more air. I recently began using an AEM dry filter instead of a Green oiled filter that came with my CAI and tune. Apparently the dry filter lets in more air and my car became borderline lean. But during the summer months at highway speeds I do not trip a lean code. Only during the winter months at highway speeds do I trip a lean code. This makes some sense as the cold winter air is more dense, therefore I'm pushing more air into the air intake and triggering the lean code. This started happening only after I began using the AEM filter. Nothing else changed. My filter also has the bulk of the dirt on the top of the filter directly under the air inlet from the hood.

I can't say I've felt any difference. But the car's computer can in fact measure the difference.