Vented hood thread

[redondoaveb]

Originally Posted by PharmDZ

Has anyone tried these out? I'm going to get my front end repainted/worked on soon and kind of wanted to pick up just the side vents to a least have some extra venting/cooling. Think it would still be worth it? I just don't know if I like the look of the center vent - although obviously it would be more functional.

370Z Hood Vent kit

Yep, a bunch of people.
Yay! Trackspec!

[Hotrodz]

Originally Posted by PharmDZ

Has anyone tried these out? I'm going to get my front end repainted/worked on soon and kind of wanted to pick up just the side vents to a least have some extra venting/cooling. Think it would still be worth it? I just don't know if I like the look of the center vent - although obviously it would be more functional.

370Z Hood Vent kit

LOL, yep there quite a few folks that have these including myself. They are a quality product!

Sent from my SM-G965U using Tapatalk

[Elmo370z]

I want

[filip00]

Let me bring this thread up. I've been thinking about hood vents lately and I'm not set on doing it yet, so help me out with your thoughts.

I'd go with two different pairs of scoops, ones to intake the air, the others to release it.

These for the intake:


and these two for release:


The positioning (excuse the rough sketch) would be as such (size somewhat correct)


It seems to me like it would work from a functional perspective, and aesthetically I think it would be OK.

Any thoughts on why this idea is really bad?

[Spooler]

Get the Tracspec. Make sure to get all three vents. The middle one removes a ton of heat front the radiator.

[filip00]

Hmm, those are going to cost an arm and leg shipped to me (Europe). Also, they don't seem to have an intake side, just exit direction. Is it as effective?

[Spooler]

Originally Posted by filip00

Hmm, those are going to cost an arm and leg shipped to me (Europe). Also, they don't seem to have an intake side, just exit direction. Is it as effective?

They work like a champ. I drive my TT 370z in over 100 deg weather with no problems. Without them, I would overheat in slow moving traffic for sure with the massive intercooler I have up front.

[Rusty]

I have the Tracspec vents too. Work great.

Those 2 inlets you have at the rear won't work like you think.

[OptionZero]

Originally Posted by Rusty

I have the Tracspec vents too. Work great.

Those 2 inlets you have at the rear won't work like you think.

I’m no engineer, but …yeah, those triangular shapes are what are called NACA ducts and are supposed to be the best shape for drawing air in

The hood I’ve seen for both the z34 and r35 all have those positioned further forward to suck in cold air

Any opening in the rear should be designed to let hot air out

[Averying]

Also skeptical about the two inlet vents at the back of the hood. Sure there is relatively higher pressure there at the base of the windshield but you want to be pulling air from the front of the car, through the coolers, and out the hood.

Trackspec vents are the go to, and they tell you where to place them for best cooling.

Sent from my iPhone using Tapatalk

[Spooler]

The expensive vented carbon fiber hoods aren't that great either for how much you pay for them.

[OptionZero]

Prices seem to have increased by 30-50% despite the yen being weak
I got my Varis for mid-teens and now it’s over $2k

For pure function, trackspec vents are more efficient

[filip00]

^I was convinced this makes most sense, but then at the same time, a lot of stock cars like GTR, M3 and similar, have NACA ducts positioned to the back, near the windshield.

I'm still thinking about what to do here, I'll do some cardboard cutouts and see various fitments on the hood, both on the hood and beneath it, to see where it's easiest to cut, what seems to be good position to draw the air out, and what is aesthetically pleasing.

[OptionZero]

I don't want to get too far afield down "GTR hoods" but NONE of the reputable companies (high end JDM or OEM/Nismo/N-Attack) have the NACA ducts positioned at the REAR of the hood

They are much closer to the middle, if toward the front (usually in combination with additional release vents)

I've attached images of the Z1 Time Attack 370Z (custom) as well as a Super Taikyu Z34 (Ings+1 hood).

or we can use are brains

cold air in through the front
air flow front to back cools engine/removes heat
hot air escapes up and out the back, and possibly side if you have venting there

there's really no sense in putting an air INLET at the back of the hood, unless you have a convoluted physics defying setup underneath

but i don't have an engineering degree

[cooltoy]

Originally Posted by OptionZero

or we can use our brains

My favorite part of the post.