source for engine heat hood extraction vents



source for engine heat hood extraction vents

Postby grumpyvette » June 12th, 2014, 4:31 pm

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adding a high rise hood allows a much larger choice in intake designs that will fit under the hood, but does little to reduce engine heat trapped under the hood, and while I know I'll hear screams from those purists the fact is that hood vents to reduce under hood head and reduce front end lift on race corvettes have been used for decades.
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keep in mind that if you can increase the radiator fans efficiency "and thats done partially by reducing and resistance to air flow exiting the engine compartment" you can increase the air flow mass absorbing heat as air passes over the radiator fin surface.
remember the c4 corvette sucks air from under the car, so at lower travel speeds the electrical fans are responsible for the vast majority of the air flowing thru the radiator, as vehicle speeds increase a increased air pressure builds under the cars nose increasing air flow rates thru the radiator.

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adding hood vents like these pictured above are mostly for show, and in my opinion some styles just look bad! (as in CRAPPY)but any decent size vent will help lower engine heat (MARGINALLY AT LEAST ) if they are to small to be ideal
if you have a good source for vents that you think might look good please post some links, but keep in mind the panel that you cut below is limited in size to about 9" wide and 12" long on each side


http://www.hoodlouvers.com/products.html
adding a larger area hood vented panel to each rear panel area thats about 9" x 12" indicated ,increased air flow rates enough to lower engine temps a measurable amount,plus it tends too lower front end lift at high speeds, especially at high track speeds, larger vents like these will help lower engine heat and they are large enough to be closer too ideal
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the rear panels are almost placed as if designed as a good location for heat to exit the engine compartment if the proper vents are added
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IF YOU CAN,T SMOKE THE TIRES AT WILL,FROM A 60 MPH ROLLING START YOUR ENGINE NEEDS MORE WORK!!"!
IF YOU CAN , YOU NEED BETTER TIRES AND YOUR SUSPENSION NEEDS MORE WORK!!
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Re: source for engine heat hood extraction vents

Postby 87vette81big » June 12th, 2014, 5:57 pm

Callaway Motors had the best looking Hood Vents on the C4 1987-91 TT.
Ducted air to those twin intercoolers.
Opposite of your intentions Grumpy removing hot air.
But comes to mind as timeless styling.
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Re: source for engine heat hood extraction vents

Postby grumpyvette » June 21st, 2014, 2:52 pm

theres an interesting post on metal vent grill screen
Vaughn wrote:Your local welding shop should be able to show you a catalog of different metals available.

....

Buying small batches is possible (but they usually don't like it), they can send out samples to those firms to show the customer what he is getting before he commits to it.

For example:
http://www.mcnichols.com/gallery/product-photos

A few of the ones I found sort of interesting:
http://www.mcnichols.com/images/mediabi ... CD%7D.jpeg
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http://www.mcnichols.com/images/mediabi ... 2F%7D.jpeg
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http://www.mcnichols.com/images/mediabi ... B0%7D.jpeg
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http://www.mcnichols.com/images/mediabi ... B2%7D.jpeg
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http://www.mcnichols.com/images/mediabi ... 4E%7D.jpeg
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IF YOU CAN,T SMOKE THE TIRES AT WILL,FROM A 60 MPH ROLLING START YOUR ENGINE NEEDS MORE WORK!!"!
IF YOU CAN , YOU NEED BETTER TIRES AND YOUR SUSPENSION NEEDS MORE WORK!!
grumpyvette

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Re: source for engine heat hood extraction vents

Postby grumpyvette » May 22nd, 2015, 12:05 pm

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I've wanted to cut out the areas indicated and install hear extraction venting as I know from previous cars that adding the vents can drop under hood temps by 20F-40F
I found a source for chrome or stainless perforated steel sheet cut to approximately the correct size for heat hood extraction vents, now I just need to figure out a cosmetically pleasing and functionally strong way to install the perforated vent panels in the hood, so if you have and Ideas please post them
IF YOU CAN,T SMOKE THE TIRES AT WILL,FROM A 60 MPH ROLLING START YOUR ENGINE NEEDS MORE WORK!!"!
IF YOU CAN , YOU NEED BETTER TIRES AND YOUR SUSPENSION NEEDS MORE WORK!!
grumpyvette

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Posts: 14105
Joined: September 14th, 2008, 1:40 pm
Location: florida


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