Need some input on vents for hoods.

drgolfnut · 10-22-2005, 08:17 PM

After STFA, I've seen many CF hoods with vents from FI and VIS. Is there any specific why the vents are generally in the front and towards the sides? Athey trying to get air flow over the top of the bumper into the engine compartment? Or do you just want vents near the back to have exit of hot air, instead of inflow of cool air? I've been staring at my engine and trying to determine where vents can be placed that woulnd't put any electrical parts at risk. I might just have an body shop hack up my hood and try it. Weight savings is not a big issue for me so I don't need CF. Any thoughts or suggestions?

ajrettke · 10-22-2005, 08:52 PM

Have one vent on the front right to allow more air infow into the air intake (if you have an open-air filter...not a airbox).
I think all the others are more for bling than anything else, but I could be wrong.

golfrsi · 10-22-2005, 09:45 PM

weather. yes water does get into them, but has not cause any issues with electronics.

EE:OutofBounds · 10-22-2005, 10:02 PM

which hood?

golfrsi · 10-22-2005, 10:06 PM

As someone who works in carbon every day, II prob could have made it on a carbon hood, and I'm sure it would have been easier than the metal, but I really didn't care about the weight savings vs. the sturdyness of the oem unit....

here are some pics of the fab process (2 different hoods)....

drgolfnut · 10-22-2005, 10:16 PM

Then I went out to my car to see if those sites made sense. It seems that the water would drip down right over the airbox, and on the other side has nothing too fragile.
I dont suppose if you placed a vent near the back center, you can create some sort of "rain gutter" to funnel the rain to a better spot.

drgolfnut · 10-22-2005, 10:17 PM

are those heating ducts? Where did you get those?

golfrsi · 10-22-2005, 10:18 PM

golfrsi · 10-22-2005, 10:22 PM

could slap it on the back,,,, it's all going to do the same job of getting rid of that extremely hot air, just personally it's gonna look like ass back there....

from a working standpoint, no actual numbers to show underhood temps are significanty lower, but at min. when I run the car and get out and feel over the vents it is very hot, so I know they are doing there job.

boostinmr2 · 10-22-2005, 11:12 PM

That looks like a 85-89 mr2. The same vent holes can be found on a 91-95 non-turbo mr2.

10-22-2005, 08:17 PM	#1
drgolfnut AudiWorld Senior Member Account #: 24874 Join Date: Sep 2001 Posts: 2,719	Need some input on vents for hoods. After STFA, I've seen many CF hoods with vents from FI and VIS. Is there any specific why the vents are generally in the front and towards the sides? Athey trying to get air flow over the top of the bumper into the engine compartment? Or do you just want vents near the back to have exit of hot air, instead of inflow of cool air? I've been staring at my engine and trying to determine where vents can be placed that woulnd't put any electrical parts at risk. I might just have an body shop hack up my hood and try it. Weight savings is not a big issue for me so I don't need CF. Any thoughts or suggestions? __________________ HERS: Level10, ASP3 custom tuned for X-1 intake, ER ICs, Bilstein PSS9s, Brembo GT 355, Stasis rear, piggie pipes and modified Miltek, Work Emotions, Matrix OCK, all assembled and cared for by WMS. HIS: casablanca widebody avant, ASP GT28RS, tuning for 91 octane in process, also babied by WMS.

10-22-2005, 08:52 PM	#2
ajrettke New Member Account #: 92548 Join Date: May 2005 Posts: 175	I would.. Have one vent on the front right to allow more air infow into the air intake (if you have an open-air filter...not a airbox). I think all the others are more for bling than anything else, but I could be wrong. __________________

10-22-2005, 09:45 PM	#3
golfrsi AudiWorld Senior Member Account #: 46784 Join Date: Nov 2002 Location: Philadelphia, PA Posts: 3,788	I went for the vents, allowing hot air to escape.... placement has been zero issue with my Northeast weather. yes water does get into them, but has not cause any issues with electronics.

10-22-2005, 10:02 PM	#4
EE:OutofBounds Elder Member Account #: 23890 Join Date: Aug 2001 Posts: 14,300	those are custom vents/ducts fabbed into the CF hood right? which hood? __________________ Out of Bounds Rideshop (908) 232-4500 (Nike SB, Supra, Diamond, Krew, Burton, Rome, Grenade, etc) Out of Bounds MySpace

10-22-2005, 10:06 PM	#5
golfrsi AudiWorld Senior Member Account #: 46784 Join Date: Nov 2002 Location: Philadelphia, PA Posts: 3,788	all steel work..... here are some in progress pics.... As someone who works in carbon every day, II prob could have made it on a carbon hood, and I'm sure it would have been easier than the metal, but I really didn't care about the weight savings vs. the sturdyness of the oem unit.... here are some pics of the fab process (2 different hoods)....

10-22-2005, 10:16 PM	#6
drgolfnut AudiWorld Senior Member Account #: 24874 Join Date: Sep 2001 Posts: 2,719	I saw pix of this car in my archive search... Then I went out to my car to see if those sites made sense. It seems that the water would drip down right over the airbox, and on the other side has nothing too fragile. I dont suppose if you placed a vent near the back center, you can create some sort of "rain gutter" to funnel the rain to a better spot. __________________ HERS: Level10, ASP3 custom tuned for X-1 intake, ER ICs, Bilstein PSS9s, Brembo GT 355, Stasis rear, piggie pipes and modified Miltek, Work Emotions, Matrix OCK, all assembled and cared for by WMS. HIS: casablanca widebody avant, ASP GT28RS, tuning for 91 octane in process, also babied by WMS.

10-22-2005, 10:17 PM	#7
drgolfnut AudiWorld Senior Member Account #: 24874 Join Date: Sep 2001 Posts: 2,719	not to sound sarcastic but... are those heating ducts? Where did you get those? __________________ HERS: Level10, ASP3 custom tuned for X-1 intake, ER ICs, Bilstein PSS9s, Brembo GT 355, Stasis rear, piggie pipes and modified Miltek, Work Emotions, Matrix OCK, all assembled and cared for by WMS. HIS: casablanca widebody avant, ASP GT28RS, tuning for 91 octane in process, also babied by WMS.

10-22-2005, 10:18 PM	#8
golfrsi AudiWorld Senior Member Account #: 46784 Join Date: Nov 2002 Location: Philadelphia, PA Posts: 3,788	rear decklid of a Toyota MR2 turbo....

10-22-2005, 10:22 PM	#9
golfrsi AudiWorld Senior Member Account #: 46784 Join Date: Nov 2002 Location: Philadelphia, PA Posts: 3,788	for me it was just allowing heat to escape,,,, but asthetics were equally important. I guess you could slap it on the back,,,, it's all going to do the same job of getting rid of that extremely hot air, just personally it's gonna look like ass back there.... from a working standpoint, no actual numbers to show underhood temps are significanty lower, but at min. when I run the car and get out and feel over the vents it is very hot, so I know they are doing there job.

10-22-2005, 11:12 PM	#10
boostinmr2 New Member Account #: 53976 Join Date: Apr 2003 Posts: 219	not to rain on your parade, but that's not a mr2 turbo engine lid. That looks like a 85-89 mr2. The same vent holes can be found on a 91-95 non-turbo mr2.

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