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So I'm looking to add some extra cooling for the engine while on the track and have seen several people mentioning that having vents does indeed work. But not so much info on where is the best place to have these.
I don't want to spend thousands on one of those fancy hoods with the vents built in, so I'm going to get a cheapo stock hood as a spare and customize it with some vents.
So where should these vents go? I was thinking 2 over where the exhaust manifolds are and then another long and skinny one right above the intake running accross the front of the hood in relation to the radiator placement kind of like what's on the Shelby GT500.
I don't currently have a racecar with hood vents. Therefore, I would suggest that a good place to start would be the Team Corvette hoods, and/or the LGM hood for their race series cars (World Challenge). You "might" experiment from there, but that would be an excellent starting point. Check with GSpeed at MSR Cresson. https://www.corvetteforum.com/forums...or-gspeed.html
Last edited by 63Corvette; 07-11-2016 at 11:03 AM.
Here is the Track Spec. I only installed the one but they also have two smaller ones that can mount over the wheel wells. Excellent product and they tell you right where to mount and give a cutout template. The have it for C5 & C6 cars
does that work? the wind going over it doesnt create a higher pressure pocket that prevents air from escaping? i was always told to add a "bubble" or a lump in front of the exit, in order to address the pressure differentials. if you look at the majority of race hoods, they embraced that concept.
not saying i'm right or that was definitive advice i was given. thoughts?
does that work? the wind going over it doesnt create a higher pressure pocket that prevents air from escaping? i was always told to add a "bubble" or a lump in front of the exit, in order to address the pressure differentials. if you look at the majority of race hoods, they embraced that concept.
not saying i'm right or that was definitive advice i was given. thoughts?
does that work? the wind going over it doesnt create a higher pressure pocket that prevents air from escaping? i was always told to add a "bubble" or a lump in front of the exit, in order to address the pressure differentials. if you look at the majority of race hoods, they embraced that concept.
not saying i'm right or that was definitive advice i was given. thoughts?
It works great!!! The pressure differential in the area of the vent is lower on top of the hood than inside the engine compartment. The vent allows a portion of the air that is coming through the radiator a path to escape. It either creates downforce or negates lift, whichever way you want to look at it. It also promotes much better engine cooling due to increased airflow through the radiator due to the pressure differential.
It works great!!! The pressure differential in the area of the vent is lower on top of the hood than inside the engine compartment. The vent allows a portion of the air that is coming through the radiator a path to escape. It either creates downforce or negates lift, whichever way you want to look at it. It also promotes much better engine cooling due to increased airflow through the radiator due to the pressure differential.
Originally Posted by REKCUF
Do either of you have the top of your inner fender cut/vented to evacuate air from the wheel well area through the hood vents?
I have studied the airflow diagrams for the later model Corvettes quite a bit. This is a picture of my race car taken from the foot bridge at Sonoma Raceway. It shows well my Trackspec vent placement. The areas where they sit are the lowest air pressure zones on the hood. I can tell the difference at speed between a vented and unvented hood in understeer. At a Trans Am race I had tire rub at Turn Nine at WSIR. Clearly, all the smoke from the tire rub came out the driver side hood vent and not the side of the wheel well or elsewhere. That provided additional good evidence of the effectiveness of the hood vents in those locations.
m
my son and I made my hood, 3 layers of fiberglass mat. It's a fraction of the weight of a factory hood and I put the vent where I had modified my previous OEM hood. I decided to cheap out on this, and save my money for parts beyond my ability to make myself.
m
my son and I made my hood, 3 layers of fiberglass mat. It's a fraction of the weight of a factory hood and I put the vent where I had modified my previous OEM hood. I decided to cheap out on this, and save my money for parts beyond my ability to make myself.
07-11-2016, 09:55 AM
Hood vent location for track cooling
Check with GSpeed at MSR Cresson. https://www.corvetteforum.com/forums...or-gspeed.html
It works!
