Has anyone made a functional cowl induction setup?

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64nailhead

64nailhead

G-Body Guru
Dec 1, 2014
916
93
Upstate NY
Meaning instead of air filter sucking hot engine heat.... having filter seal against raised cowl and utilizing the pressurized air at the base of the windshield? If so pics would be great!
Thanks!
There are several schools of thought about how a cowl induction hood functions best. One is what 565 and 83montess have done where they are pulling air in from the cowl to feed the carb. I think that a cowl works best for giving the heat somewhere to go. You might think that means your carb will be feeding on the hot air from the engine compartment but you'll find just the opposite. It will be feeding on the fresh air that is displacing the air that is escaping out the cowl.

If you can appreciate, the car in my avatar makes a TON of engine heat when it's working hard and the air coming out of the cowl will actually heat the windshield. We tried to run with a stock hood and the engine bay temps are just too high - to the point that I have to start pulling timing when city driving.
 
565bbchevy

565bbchevy

Geezer
Aug 8, 2011
6,384
113
Michigan
I think that a cowl works best for giving the heat somewhere to go
I agree and even though I already had functional fender vents I felt it necessary to get more hot air out which is why I made hood vents also for my Monte.
IMG_0357.jpg
 
T

Tony1968

Master Mechanic
Supporting Member
Jul 1, 2018
323
63
NW Indiana
I agree and even though I already had functional fender vents I felt it necessary to get more hot air out which is why I made hood vents also for my Monte.
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There's an old article from the 60's when GM was testing a vette with and without cowl induction and inducted knocked some seconds off I believe 0 to 100mph Zora was involved in that case. I wish I could find it but it's been too many decades since I read it
 
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bracketchev1221

Master Mechanic
Jan 18, 2018
439
63
You’d really have to test it to see if there is any gains. It’s a nice idea in theory but my car slowed down with the air pan.
 
Z

Zspoiler

Apprentice
Jun 3, 2018
85
18
I plan on in the future buying a 2" steel cowl hood. And using The cowl induction set up I used in my 1979 Z-28 RS as seen in a Hot Rod rod magazine from "back in the day:" How to make a hood scoop functional. I use the base and the stock snorkel set up. A air cleaner lid from a Mopar slant 6. The seal from a 1969 Z-28 and or 1970 Chevelle cowl induction set up .Cut to fit.You can use a stock air filter .E-- 1500.And it should look fairly stock, You could probably start out with the stock air filter base and do the same thing.
 
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Z

Zspoiler

Apprentice
Jun 3, 2018
85
18
Cowl induction hoods are fun to watch when it rains and or snows. and watch the rain and or snow flakes do a 180 into the scoop.
 
vanrah

vanrah

G-Body Guru
Apr 16, 2013
757
93
Near Afton, Wisconsin
Greetings Zspoiler & all: Your set up must have something different than mine?? I had thought the same thing until Mother Nature showed me different. Coming back (75 mi) from Car Craft Nat's (2016?). I drove in what weather man say is "training rain" (1-1/2 hours) at 35 40 MPH when most drivers were on the side of road. Heavy rain would be an understatement! So I'm watchin' the rain come off the raised cowl portion of the hood excepting it to turn 180* & I would have pull over to the side of the road too. To my amazement the rain only turned 90* down into the windowshield cowl! Car ran fine, so when I got home I opened the hood excepting a wet air box! To my surprise like ONE drop of water, 99% dry, go figure. Now had I been able to drive faster the higher pressure may have driven the rain into a 180* turn & I would of seen more water enter the air box. But haven't experience that problem either, maybe because it would be a lighter rain when ya can 60-70 MPH. But what I did experience from that torrential down poor (Car Craft Nat's) was humidity vapor getting into the distributor threw the vent (MSD vented cap). And that sets under the air box & is sealed from the open air box. So that moisture was just spray coming up around the engine-trans area kicked up by front tires. From experience, Ole Bob.
Ps: Note hood vents for exiting HOT air, could be bigger!
 

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