Fiberglass Cowl Hood venting ideas

[nvrstuk]

Cutting holes in the cowl hood is more of a cosmetic feature than a cooling feature- unless you cut a lot of holes.
Then you have to weigh the fact that you are staring at all these holes you've cut into the back of the cowl evertime you drive it. Personal taste thing here...

Buy the inner fender vents from WH or make your own. They allow a tremendous amount of air to circulate within inches of the source of the most heat in your engine- both sides!

I cut my inner fenders out years ago and the amount of heat trapped under the hood has been reduced tremendously. I have no way of measuring except I don't have to replace the gas struts for the hood regularly anymore as the heat was killing them according to the engineers I talked with.

No holes in the hood to stare at all day either.

 

[nvrstuk]

I was told I need to cut out the back of the cowl for it to cool the engine. So that is part of what I want to possibly match to the sides


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Did you tell us what engine/trans combo you have?

I don't see any reason to vent the hood with the proper cooling system. ALL 5.0's cool with a stock sized radiator, and the rest of the cooling system at 100%. If not, then there's a problem with your cooling system, not your air flow. It helps to have more air moving out of the engine compartment but not needed.

 

[zfbailey23]

So it’s a 302/C4 combo. Same engine & trans that came with it. I did have the engine rebuilt last year Sandy’s 4x4 here in Augusta, Ga.
The engine stays cool, it has a large aluminum radiator in it that has no problem.
I was just thinking having some cooler air coming in for the intake would be beneficial
I think I am going to go with the inner fender vents, bc I like the way the cowl looks w/o the hole.
I do want the “cowl” vents for the side vents to get some fresher air into the cab


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[zfbailey23]

If Scoop's hood cowls were from Bronco Hut, there's a good chance they were made by Jason Gamroth, a member of the Colorado Early Bronco Group on Facebook.

Thanks for this info,
I was able to contact Jason via Facebook
Here’s his FB profile.

Jason Gamroth

Jason Gamroth is on Facebook. Join Facebook to connect with Jason Gamroth and others you may know. Facebook gives people the power to share and makes the world more open and connected.

www.facebook.com

He was great, made these for real quick

Not sure yet if I am going to go with them, but he was great to work with


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[Scoop]

Thanks for this info,
I was able to contact Jason via Facebook
Here’s his FB profile.

http://[URL]https://www.facebook.com/jason.gamroth?mibextid=2JQ9oc

[/URL]

He was great, made these for real quick

Not sure yet if I am going to go with them, but he was great to work with


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Yup, those are the same ones I have.

 

[DirtDonk]

Glad they are still being made. But remember, those are for cabin air, not engine compartment air.
But not a big deal in this situation, since you say that your engine is running cool and fine.
Not really a matter of getting hot air out of the engine compartment at this point.

 

[DirtDonk]

Or did you eliminate your drivers and passengers vents?
If so, then evacuating hot air from right on the top of the cowl, will still help keep the interior cooler, while venting a little extra hot air from under your hood at slower speeds.

Speaking of speeds, has anyone ever tested the quality/quantity/velocity of air being forced in to, versus being forced out of, those vents at different speeds?
Or tested for the same when the openings were facing forward versus facing rearward?
I’d be very curious of those results.

 

[zfbailey23]

Glad they are still being made. But remember, those are for cabin air, not engine compartment air.
But not a big deal in this situation, since you say that your engine is running cool and fine.
Not really a matter of getting hot air out of the engine compartment at this point.

Yeah, that’s why I wanted to get them, bc all the air coming into my cab is from the engine compartment- which isn’t exactly refreshing in these Georgia summers


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[DirtDonk]

How are you sealing the hood to the vents now? If it does not fit tightly up against the stock type rubber seals, you will still need to adjust/tweak that to keep under-hood air where it belongs. Even with the vent super-scoops, you'll still get escaping engine vapors in there.
Oh, and I don't believe fiberglass hoods come drilled for the "cowl lacing" vent seal, but something along those lines should still be installed when it's possible.
Highly recommend sealing things off as well as possible, in addition to adding any improvements to the ducting.
After all, any sealing is a big improvement!

Paul

 

[DirtDonk]

Speaking of improving air quality... If you have not tracked down and sealed EVERY POSSIBLE air intrusion point in the cowl, firewall and floor pan (not to mention the rear corners too!) you're still fighting an uphill battle.
Sometimes takes years to track them all down and plug them.
But boy, oh boy, once you've done it, life is good!

Paul