Vented hood thread

[DIGItonium]

Thanks, all. I'm not sure I even need a thermal camera since it's easy to test with the cooling fans running. The front most vent doesn't flow much air at all, but the one in the middle vents lots of air. That should give you guys a ball park.

Overall, I'm liking these vents especially the middle one. If you guys have Aero Jacket cut them out for you, be prepared for lots of prep work to make it look clean. The tech at the body shop did an excellent job cleaning things up and adding additional reinforcements. It should be further improved once grills are added.

[GaleForce]

Originally Posted by DIGItonium

Thanks, all. I'm not sure I even need a thermal camera since it's easy to test with the cooling fans running. The front most vent doesn't flow much air at all, but the one in the middle vents lots of air. That should give you guys a ball park.

Overall, I'm liking these vents especially the middle one. If you guys have Aero Jacket cut them out for you, be prepared for lots of prep work to make it look clean. The tech at the body shop did an excellent job cleaning things up and adding additional reinforcements. It should be further improved once grills are added.

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I wouldn't get Aero Jacket to make the hood for me after seeing what they gave you to work with. Your tech did a great job cleaning up their work. Looks great!

[DIGItonium]

Originally Posted by GaleForce

I wouldn't get Aero Jacket to make the hood for me after seeing what they gave you to work with. Your tech did a great job cleaning up their work. Looks great!

It's a one off kind of thing. I ended up spend way too much on this hood after all is said and done. Issues keep piling up... now my DVD HU is dead after picking up the car. No guarantee the shop is going to cover it.

[GaleForce]

Originally Posted by DIGItonium

It's a one off kind of thing. I ended up spend way too much on this hood after all is said and done. Issues keep piling up... now my DVD HU is dead after picking up the car. No guarantee the shop is going to cover it.

I understand.

Hopefully you get your head unit sorted out ok. Have you checked the fuses?

[wstar]

Originally Posted by DIGItonium

I'm not sure I even need a thermal camera since it's easy to test with the cooling fans running. The front most vent doesn't flow much air at all, but the one in the middle vents lots of air. That should give you guys a ball park.

Yeah but I assume you mean you're looking at the coolant fan flow with the car sitting at a stop. Everything can change pretty dramatically once the aero effects come into play at speed (80mph wind hitting the front grill, flowing over the car in some unknown shape, bouncing off the windshield, etc).

Ideally we'd wind-tunnel this stuff, but that's pretty unlikely to happen given the costs. The yarn thing is really the way to go for at least understanding the airflow on the outside skin of the hood. Differential pressure gauges can tell us for sure where the pressure buildups happen both under and over the hood. Between those two we can probably make some pretty good approximate design choices.

To me, the real tragedy is that the community will have to eventually do this itself instead of some manufacturer doing it with their own resources and time. The ratio of vented hoods being sold by vendors to vendors actually doing research to make sure they're effective is sad.

[Chuck33079]

Originally Posted by wstar

The ratio of vented hoods being sold by vendors to vendors actually doing research to make sure they're effective is sad.

That ratio is directly in line with the ratio of people who want a vented hood because it looks cool to people who want a correctly designed vented hood. Digi's is one of the few I've seen where the vents look like they're in the right place and shaped right.

[wstar]

Originally Posted by Chuck33079

That ratio is directly in line with the ratio of people who want a vented hood because it looks cool to people who want a correctly designed vented hood. Digi's is one of the few I've seen where the vents look like they're in the right place and shaped right.

Well, sure, I could've restated my opinion as a statement about ratios of types of owners too, and I might've done it with sharper words than that, but then the whole forums would come down on top of my head There's nothing wrong with owning/driving a sportscar just for the look-and-feel, but it starts bugging when people throw so many hours and dollars into modding the hell out it with very functional-sounding parts any have no idea whether they're functional or counter-productive...