dbs1vette

I get close to that 150mph mark when road racing and see some lift along with the heat this 416 puts out I'm thinking it might be a worthwhile mod.

The previous owner said the current hood is fg, not cf so not a concern on originality.

I'm debating smaller triangular holes near the side fender with black screen vs some "mamba" vents off a gt500 and putting them in the center of the silver stripes more toward the middle of the hood and about 6-8" back from the windshield. They are about 6" wide and 12" long.

Any input here? I'm a fan of function over form, but think the actual vents painted to match the silver stripe would look much better, just not sure if there would be a significant diff in benefits from the 2 locations?

Hi Volts Z06

At that speed venting the hood makes a big difference and if done properly will yield downforce as opposed to lift. The key is to be able to exhaust as much air as the radiator is flowing (or at least in a perfect world). Most of us who are racing with NASA can take advantage of full aero so when you are running a splitter and wing, venting the hood becomes almost a necessity to properly balance the car at high speed.

You don't make note to whether this is mostly a track car or a street car you occasionally track. I am going to assume the later in which case I would go ahead and do it. You will see some improvement but the real benefit comes when you lean the radiator forward, put an under tray and make the car a true front breather.

dbs1vette

It is the latter. I had a car that was mostly track catch fire and burn last year and that has cooled my jets (and budget) so this car will maybe see 4-5 days of 2 sessions a year.

Hi Volts Z06

I feel your pain. I had the exact same thing happen at the Glen last September (clutch let loose and slave cylinder fed the fire). I'm still waiting for my to be done (and still writing the checks).

Bad Karma

I just bought a hood; that I have to pick up this week and get home (that'll be fun) so I can vent it as well.

Here's what I'm looking at doing on mine:
http://www.hoodlouvers.com/racinghigh-performance/

Unless I really want to get creative and pull out the welder to fab my own center vents (probably go pre-made, but part of me likes to build stuff).

dbs1vette

Well for sure post up some pics of the finished product. I'd like to see what you end up doing.

RDnomorecobra

I was just going to post that link.

Be thoughtful about where to cut. Not too close to the windshield, that is a high pressure area.

brkntrxn

Here is what I did. Start at post #84 for the louver install.

http://forums.corvetteforum.com/auto...6-build-5.html

Contact David Farmer Racing if you want to order a set of the louvers I used.

brkntrxn

duplicate post

dbs1vette

Yeah, trying to figure out just how far back from the windshield to start...

brkntrxn

Your mark is just behind the radiator. You want airflow to come through the radiator and out of the engine compartment as quickly and easily as possible. So whatever louvers or opening you decide upon, you need to think about proximity to airflow through the radiator as your starting point. Not the other way around.

Olitho

I had those louvers for a short while. I did not like them for either function or form. It did not vent the pressure under the hood all that well and my radiator did not get the velocity of flow I was looking for even at speed.

What I switched to is this http://www.trackspecmotorsports.com/info.html I don't see the louvers listed on the website and that is probably because they are brand new. I have first six races on them at Thunderhill two weeks ago and Buttonwillow this past weekend. People come over to check them out and comment positively.

Here is a bad picture of the louvers. This photo does not do them justice. They are really bad *** looking, but more importantly they breath way better than the old louvers I had. He did both the main louvers in the front center and the smaller side louvers. I wanted him to keep it under 600 sq inches per the SCCA GT2 and T1 rules, although I also race ST2. John at Trackspec fit them specifically to my racing Corvette application. He is doing another design for Redtopz who many of you know and respect for his racing abilities.




Here are some more CFD pictures you should consider in your design and selection of your louvered air flow system. I used them in the placement of my louvers.

Olitho

Olitho

If you go to the Trackspec Facebook page here https://www.facebook.com/pages/Track...5927?ref=br_tf you can see some better pictures including a picture of John crewing on my car at the US Majors race at Buttonwillow on Saturday.

Here are some other pictures.

troyguitar

Those trackspec ones look pretty sweet, they must help a lot.

VGLNTE1

What do those run as far as price? Are they universal or made to contour to the c5 hood?

Bad Karma

Thanks for the link (before I ordered, haha). I really like that design especially for the main vent.

Like asked before any idea on their pricing on the vents?

Pumba

The following pictures show my new Black Dog Racing vented CF Kevlar hood for C5s.










With my Tiger Shark front fascia I am a true front breather. Also, I have installed a full undertray that comes back as far as the bottom of the radiator. With these additions, I am hoping to feel more down force at speed and better cooling.

smellya

That would look nice on my c6z

VGLNTE1

I'd hate to see that price tag