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Discussion Starter · #1 ·
Do the vents in the VIS, HKS, A51, etc, work to actually dissipate heat out of the engine bay? The topic of hot engine bays because of turbos has been discussed, so is it worth it to buy a vented hood to help circulated air?
 

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im not sure...the only reason why i dont want one is because rain might get in there... :oops:
 

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I would say only if you took the underbody pannel off, then air has to be forced from under the car, through the engine and out the vent, if someone did a hood with a scooby type vent then i could see keeping the engine cool. I too wonder about rain in the engine bay, I can see that vents can cause an extremly dirty engine bay.

David
 

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trd hoods for supras have the rainguards, they channel water to the front of the engine. Many pepz said they never have had any issues with rain .
 

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Discussion Starter · #5 ·
IS3FINALLYmd said:
trd hoods for supras have the rainguards, they channel water to the front of the engine. Many pepz said they never have had any issues with rain .
Yeah, I have also seen a Varcies(sp) hood on a GS. You bolt up the rain guard with the attached bolts and it channels the rain down around the radiator. I am in SoCal, so not much rain.
 

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i'll try to find a way t otake underhood temps stock, & then after i try the new hood.... any one know a good way to do this other than with a say little basic digital thermometer etc...? kitchen cooking thermometer...?

seriously...?


I am also figureing out how to create a little "rain tray" for the vents in tha hood....removeable is nice... :wink: .


really tho water in the engine bay is not really a big deal unless it is ALOT, & or pouring on the air filter etc... but the amount of water that will get in on a vented hood should not cause problems.... motors ran "open" for along time underneath & at the sides etc...etc, & they survived....they will get dirty as hell but should run fine...connectors & such are sealed much better than they were.... but i will still try to fabricate SOMETHING out of a bit of CF layup to help keep it semi clean

i'm thinking articulating louvers out of CF that will roll open to vent & roll flat to seal..... :crazy:

" the Incredible Carbon Fiber articulating-louver vented hood"


:lol: :lol: :crazy:
 

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edgy said:
i'll try to find a way t otake underhood temps stock, & then after i try the new hood.... any one know a good way to do this other than with a say little basic digital thermometer etc...? kitchen cooking thermometer...?

seriously...?


I am also figureing out how to create a little "rain tray" for the vents in tha hood....removeable is nice... :wink: .


really tho water in the engine bay is not really a big deal unless it is ALOT, & or pouring on the air filter etc... but the amount of water that will get in on a vented hood should not cause problems.... motors ran "open" for along time underneath & at the sides etc...etc, & they survived....they will get dirty as hell but should run fine...connectors & such are sealed much better than they were.... but i will still try to fabricate SOMETHING out of a bit of CF layup to help keep it semi clean

i'm thinking articulating louvers out of CF that will roll open to vent & roll flat to seal..... :crazy:

" the Incredible Carbon Fiber articulating-louver vented hood"


:lol: :lol: :crazy:
thermocouples/thermistors...tape or epoxy them down
 

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Airflow over the vent openings actually draws heat out (creates vacuum)not air pushing up from the bottom.
To prove this, blow across the top of a hot cup of coffee instead of blowing into the cup. You'll see the coffee cools much faster.

Physics! :crazy:
 

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It does help. but you have to tolerate the look of it.

laws of aerodynamics is that the hood area of a vehicle in motion becomes a low pressure area. Low pressure is created when the air at that part of the car is moving faster than other area

so the frontal area.. (bumper/ grill) air is moving slower than the hood area. since there is more drag..

the higher speed of the air in the hood area will create a slight vaccume to draw out air. inside the engine is hot air so it will draw out some heat.

Also since heat raises vent on hood will also let out heat when car is not in motion.

Look up aerodynamics and low pressure on the net you will see a bunch of articles about it.
 

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Discussion Starter · #10 ·
I have thought about getting the TRD hood, it is the best quality cf hood out there, bot no vents.

Thanks for the help. Ed let us know if you find out anything.
 
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