Cowl high pressure area, anyone getting air from there?

[KAILUAZ]

Does anyone get fresh air for your carb or EFI from the cowl. Not a cowl hood, I mean the actual cowl area in front of the windshield? I've been reading this is a good area as the air naturally wants to go down and not up and over the windshield like you think it would.
Thoughts?

 

[KAILUAZ]

No one?

 

[BLOWN 5.0 FOX]

I think I speak for everyone when I say....
wait whaaaaaaaaa??

 

[ebk06]

I think I speak for everyone when I say....
wait whaaaaaaaaa??

werd lol You read its a good area? A good area for what?

 

[Ghost001]

I guess you're talking about getting air through the cowl vent, by cutting a hole in the firewall in front of the cowl area.

In other words, take the air that would normally be vented into the cockpit when the "Vent" is turned on, and redirect that air into the engine bay.

It seems like it would work, although I wouldn't want to cut a big hole in my firewall.

The firewall is weak enough already, and I use it to support my strut tower brace.

I guess, another option, would be to take the air that would be blowing out your vents in the cockpit, and somehow re-direct that air to the engine bay. However, I don't know how you'd do that, without cutting a hole in the firewall.

I would guess that a cowl hood would work better.

 

[KAILUAZ]

Yes taking the air from the cowl area, I guess I should have known few Stang owners would know what I'm talking about. I see this idea is too far out of the box for most.

 

[85Vertible]

I am not sure what comments you are looking for but people have been using the stock cowl to vent out excess heat for as long as I can remember. Its not so "out of the box" as you call it. Its that much more effective methods exist so its just not done anymore. If you think about how much air is forced though your cabin vents without the help of a fan, its not much. If you want to draw in air for a carb or efi in that manner, it would be less effective than say a stock dual snorkel breather. I agree with Ghost, I would rather not cut into my firewall when there are easier options.

 

[93 LX]

NASCAR has been doing this fo ryears. It does pressurize the intake air flow however I think the effects you arte looking for happen at high speed, not too much for normal driving. I tried it on my 82 Capri but saw little improvement in ETs or in normal driving throtle response.

Allen

 

[Ghost001]

I'm looking at a photo of my engine bay, and I don't see any nice, convenient, large area for a decent-size hole.

It looks like there's way more room for a hole in the standard location, the passenger side of the engine bay, near the passenger side fender well.

In that photo of yours, it looks like that tube is not very large in diameter (it's sort of flat too), so I'm thinking it may be better to use a larger diameter tube in the standard location, on the passenger side of the engine bay, near the passenger side fender well.

You could even have 2 holes, because there's plenty of room in the standard location.

Unless the air in the cowl is more pressurized than I'm imagining, and I'm no expert on that subject, it seems like it would be better to use larger hole(s) in the standard location, rather than cutting a smallish hole in the firewall.

Also, if you used the cowl, it seems like you'd have a hard time fitting a decent size air filter in the cowl. Unless you use one of those old fashioned disk-shaped filters that sits in the engine bay, over the engine.

Still, it's an interesting idea.

 

[93 LX]

on my 82 Capri I made a large extension vent from the rear of the air cleaner that went to the firewall, used a GM F-body flexable tubr to connect the air cleaner to the opening I cut in the firewall and pop riveted a flange that the flewable tub could attach to. Lots of cut fingers bening sheet metal but like I said I did not see any improvement. I assume the Chevy boys did with their cowl induction hoods from years gone by. Oh well....

Allen

 

[KAILUAZ]

A few pics

 

[KAILUAZ]

Not a Stang but the same concept:
View attachment 343615
View attachment 343617

 

[KAILUAZ]

View attachment 343609
View attachment 343611
View attachment 343613

 

[skunk21]

you aren't going to get much of a responce to ? about this since I don't think many have tried it. like the others have posted cutting up the fire wall for some onproven gains is nuts, the nets gains from this on a street car isn't worth the trouble one would go through to make this work. nascar uses this to force air into the carbs but the body is also wind tunnel tested and designed to do this I believe, also they run at high speed where the aero comes more into play, plus they run more wide open throttle.

running a cowl hood to remove the heat under the hood is much better but if your looking for a cooler air don't run cai with an open element that is in the engine bay. running a ram air type hood, stock airbox with a K&N or a cai if you have to with element in the fender and save your thoughts for a power adder or good H/C/I combo to get more power vs worrying about the cowl vent for added hp.

 

[ninety15.0]

Those pictures posted about should give you a decent idea of the amount of work required to do this. Secondly...notice that all those cars are carbed. I dont think this is a good idea for an injected car. Some of those setups have a filter element inside the cowl area. Looks like this would have to be a purely custom setup...one that may not be worth your time or money. Performance increases can be had in other areas with less fussing around. I like the idea for a roundy round car though!