scoop direction - The 1947 - Present Chevrolet & GMC Truck Message Board Network

ya it is a classic · 06-30-2011, 04:53 AM

hey guys so i made a cowl(yes homemade, next time ill spend the $120!) anyways so i got bored and wanted to build a scoop for it also. its just goin to be a box pretty much. i put a 4in air cleaner in there. so after i dinked around for about 45 minutes getting my pieces of poster board the right size i saw a square bucket that was THE EXACT SIZE as my scoop mockup. anyways i dont have any metal now anyways so i cut the bucket up and bolted it on. looks kinda cool but im not sure which way to face it. do i put it so the scoop is facing front? or do i flip it around cause i have a functional cowl? does the cowl even do anything? it looks good facing front and thats how i put it but that kinda defeates the purpose of the cowl. becides looking BA! or should just take it off cause the scoop looks kinda funky. (its a bucket!) also its on a 350. ya kinda dumb that i did it but i was bored and wanted to make something. thanks for your input.
-chad

*project 67 sub* · 06-30-2011, 05:07 AM

any pics of said bucket scoop??

ya it is a classic · 06-30-2011, 05:16 AM

Quote:

Originally Posted by project 67 sub

any pics of said bucket scoop??

haha ill get some for ya tomorrow. i must say its pretty cool in a wierd way.
-chad

*project 67 sub* · 06-30-2011, 05:18 AM

haha for sure

67_C-30 · 06-30-2011, 07:25 AM

I'd say "ta' not to"!

**special-K** · 06-30-2011, 07:46 AM

Any cowl induction hood would be all the way back to the "cowl" and takes air by using the air off the windshield turbulence. Just sitting in the middle off the hood it will act more as a heat vent (outlet). With forward facing scoops,taking in rain is a concern. Are you sure about this?

ChevLoRay · 06-30-2011, 02:18 PM

special-K is right. The air moving over the hood of a vehicle creates a higher-pressure at the base of the windshield. That increased pressure is what makes cowl induction work. Look at a side view of your hood/windshield. Visualize the air moving from front to back, and as it is forced over the hood, it runs into the windshield. That impact makes the air swirl in a clockwise direction. If your cowl induction is opened, the air movement will be right into the direction of the back side of the engine, and you should have something that will direct that air movement into your intake system.

Oh, here's something else to visualize....whirrled peas.

**truckster** · 06-30-2011, 02:23 PM

I agree with everything said so far. But to clarify, you'll only get the benefit of cowl induction if you have a relatively sealed airflow between the open edge of the hood and the air cleaner.

ChevLoRay · 06-30-2011, 02:46 PM

Guess I should have stated so....good call. If anyone has any doubts, check out the first Z-28's, that Smokey Yunick and Grumpy Jenkins set up. It wasn't pretty, but they won races.

ya it is a classic · 07-02-2011, 01:32 AM

good info guys. i took the scoop off the next day. i was just really bored that night. anyways if i did do that i would need like an airbox thats sealed onto the cowl opening and goes down into the engine?(if im reading that right, truckster) i know how a cowl works but is it even worth it to fabricate something like that? im always on the quest for more HP for free so any advice/ideas would be takin into consideration.
-chad

ChevLoRay · 07-02-2011, 11:36 AM

Most street usage is just an open element air filter. In my opinion, you wouldn't have to duct the air to the carburetor unless you were doing some racing....and it was allowed to be altered in the class you ran.

06-30-2011, 04:53 AM	#1
ya it is a classic Registered User Join Date: Nov 2009 Location: conrad, montana Posts: 253	scoop direction hey guys so i made a cowl(yes homemade, next time ill spend the $120!) anyways so i got bored and wanted to build a scoop for it also. its just goin to be a box pretty much. i put a 4in air cleaner in there. so after i dinked around for about 45 minutes getting my pieces of poster board the right size i saw a square bucket that was THE EXACT SIZE as my scoop mockup. anyways i dont have any metal now anyways so i cut the bucket up and bolted it on. looks kinda cool but im not sure which way to face it. do i put it so the scoop is facing front? or do i flip it around cause i have a functional cowl? does the cowl even do anything? it looks good facing front and thats how i put it but that kinda defeates the purpose of the cowl. becides looking BA! or should just take it off cause the scoop looks kinda funky. (its a bucket!) also its on a 350. ya kinda dumb that i did it but i was bored and wanted to make something. thanks for your input. -chad

06-30-2011, 05:07 AM	#2
project 67 sub Account Suspended Join Date: Mar 2007 Location: san bernardino ca. everywhere Posts: 3,938	Re: scoop direction any pics of said bucket scoop??

06-30-2011, 05:18 AM	#4
project 67 sub Account Suspended Join Date: Mar 2007 Location: san bernardino ca. everywhere Posts: 3,938	Re: scoop direction haha for sure

06-30-2011, 07:25 AM	#5
67_C-30 I have a radical idea! Join Date: Jan 2005 Location: Sweet Home Alabama! Posts: 6,513	Re: scoop direction I'd say "ta' not to"! __________________ '67 C-30 Dually Pickup 6.2 Turbo Diesel, NP435 ‘72 C-10 SWB , 350 4bbl, TH350 '69 C-10 SWB , 250 L6, 3 OTT '69 GMC C3500, dump truck, 351 V6, NP435 '84 M1009 CUCV Military Blazer 67 C-30 Turbodiesel build thread http://67-72chevytrucks.com/vboard/s...d.php?t=254096 My trucks http://s226.photobucket.com/albums/d...ediafilter=all Member of the 1-Ton Club!

06-30-2011, 07:46 AM	#6
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,852	Re: scoop direction Any cowl induction hood would be all the way back to the "cowl" and takes air by using the air off the windshield turbulence. Just sitting in the middle off the hood it will act more as a heat vent (outlet). With forward facing scoops,taking in rain is a concern. Are you sure about this? __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

06-30-2011, 02:18 PM	#7
ChevLoRay Old Skool Club Join Date: Jun 2001 Location: Benton, AR "The Heart of Arkansas" Posts: 10,880	Re: scoop direction special-K is right. The air moving over the hood of a vehicle creates a higher-pressure at the base of the windshield. That increased pressure is what makes cowl induction work. Look at a side view of your hood/windshield. Visualize the air moving from front to back, and as it is forced over the hood, it runs into the windshield. That impact makes the air swirl in a clockwise direction. If your cowl induction is opened, the air movement will be right into the direction of the back side of the engine, and you should have something that will direct that air movement into your intake system. Oh, here's something else to visualize....whirrled peas. __________________ Member Nr. 2770 '96 GMC Sportside; 4.3/SLT - Daily driven....constantly needs washed. '69 C-10 SWB; 350/TH400 - in limbo The older I get, the better I was.

06-30-2011, 02:23 PM	#8
truckster Senior Member Join Date: Jan 2001 Location: Orem, Utah Posts: 7,957	Re: scoop direction I agree with everything said so far. But to clarify, you'll only get the benefit of cowl induction if you have a relatively sealed airflow between the open edge of the hood and the air cleaner.

06-30-2011, 02:46 PM	#9
ChevLoRay Old Skool Club Join Date: Jun 2001 Location: Benton, AR "The Heart of Arkansas" Posts: 10,880	Re: scoop direction Guess I should have stated so....good call. If anyone has any doubts, check out the first Z-28's, that Smokey Yunick and Grumpy Jenkins set up. It wasn't pretty, but they won races. __________________ Member Nr. 2770 '96 GMC Sportside; 4.3/SLT - Daily driven....constantly needs washed. '69 C-10 SWB; 350/TH400 - in limbo The older I get, the better I was.

07-02-2011, 01:32 AM	#10
ya it is a classic Registered User Join Date: Nov 2009 Location: conrad, montana Posts: 253	Re: scoop direction good info guys. i took the scoop off the next day. i was just really bored that night. anyways if i did do that i would need like an airbox thats sealed onto the cowl opening and goes down into the engine?(if im reading that right, truckster) i know how a cowl works but is it even worth it to fabricate something like that? im always on the quest for more HP for free so any advice/ideas would be takin into consideration. -chad

07-02-2011, 11:36 AM	#11
ChevLoRay Old Skool Club Join Date: Jun 2001 Location: Benton, AR "The Heart of Arkansas" Posts: 10,880	Re: scoop direction Most street usage is just an open element air filter. In my opinion, you wouldn't have to duct the air to the carburetor unless you were doing some racing....and it was allowed to be altered in the class you ran. __________________ Member Nr. 2770 '96 GMC Sportside; 4.3/SLT - Daily driven....constantly needs washed. '69 C-10 SWB; 350/TH400 - in limbo The older I get, the better I was.



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