The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1967 - 1972 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 10-14-2006, 08:28 AM   #1
pkj
Senior Member
 
Join Date: Jun 2006
Location: waycross ga.
Posts: 438
fresh air intakes?

i have noticed that the fresh air tubes on the new fuel injection engines have extra cavitys for air volumn built on the sides of them. what are these for? performance? economy? sound controll? it seems all the big factory motors have these and i would like to know what the benifit of these are. thanks, pkj
pkj is offline   Reply With Quote
Old 10-15-2006, 03:50 AM   #2
Werewolf
Woof?
 
Werewolf's Avatar
 
Join Date: Jun 2005
Location: Raleigh, NC
Posts: 276
Re: fresh air intakes?

They're there to deaden the typical BWAAAAA sound you get when you gun it. Fuel injection motors make a lot more racket without 'em when you get on the gas. Most cars have them these days.
__________________
1968 LWB CST BB
2004 Avalanche Z71 LT3.
2003 S-10 ZR2 (hers).
1997 Astro
1992 Caprice wagon, 500k stock miles. Nursing wounds after a bad wreck.
1997 Saturn - need gas mileage from something!
Werewolf is offline   Reply With Quote
Old 10-15-2006, 10:53 AM   #3
Longhorn Man
its all about the +6 inches
 
Longhorn Man's Avatar
 
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
Re: fresh air intakes?

yep, noise control... and they ususlly slow the car down.... hardly measurable... but it does though.
Longhorn Man is offline   Reply With Quote
Old 10-15-2006, 03:04 PM   #4
Werewolf
Woof?
 
Werewolf's Avatar
 
Join Date: Jun 2005
Location: Raleigh, NC
Posts: 276
Re: fresh air intakes?

Because they introduce distortion into the air flow, whereas smooth tubes allow for the smooth flow of air into the engine. But yeah, only good for a few horsepower.
__________________
1968 LWB CST BB
2004 Avalanche Z71 LT3.
2003 S-10 ZR2 (hers).
1997 Astro
1992 Caprice wagon, 500k stock miles. Nursing wounds after a bad wreck.
1997 Saturn - need gas mileage from something!
Werewolf is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 05:47 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com