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#1 |
Registered User
Join Date: Aug 2010
Location: Netherlands, The Hague
Posts: 1,518
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Air intake: under the hood or behind the grill?
I have been having some discussion lately and I was wondering what you guys think?
What would be the best place for air intake: - under the hood (see my first picture) or - an intake behind the grill connected by a hose? (see second picture) both pictures are from my car. The second is how I bought it, the first is after I had it fit with an LPG system. It now runs on liquid natural gas. which costs less than half the price of regular fuel. and we took 80% of the eco-stuf of the engine. No use for it in th Netherlands. I think the intake like it was should be better: 1. because air from behind the grill is always cooler 2. less dirt/oil/etc from under the hood is sucked into the airfilter 3. works like a forced air intake on highway? => better performance? I think? what do you think?
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My dreamride / project:1977 GMC C15 Suburban In storage: Monster - 1974 GMC Suburban 25hundred Sold : Chevrolet Suburban K20 Silverado 1986 Guide: real HID projectors for 4x6 headlights link: DIY LED TAILLIGHTS |
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#2 |
Registered User
Join Date: Jul 2010
Location: Georgetown, KY
Posts: 183
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Re: Air intake: under the hood or behind the grill?
You're correct that the original way is the better method of air intake. I don't know anything about vehicles that run on LP gas, what is the hose overtop of the air filter for?
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Andrew 1987 V20 Scottsdale 383 TBI, SM465, NP208, 14FF, 4.10 1988 C1500 Scottsdale 305, 700R4, 3.08 1986 K30 Custom Deluxe 6.2, SM465, NP205, 14FF, 4.10 |
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#3 |
Account Suspended
Join Date: Dec 2007
Location: Unnapreciative, Trollville
Posts: 2,079
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Re: Air intake: under the hood or behind the grill?
The stock configuration gives you much cooler air so its like a tad of free power vs the open element under the hood. but the accordian shape of the inlet tube screws up air flow, but its still better as long as you dont have some fire-breather that need huge volumes of air.
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#4 |
BAD BOW-Silverado XST
Join Date: May 2000
Location: Senior Member from Austin, TX
Posts: 6,431
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Re: Air intake: under the hood or behind the grill?
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#5 |
Account Suspended
Join Date: Dec 2007
Location: Unnapreciative, Trollville
Posts: 2,079
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Re: Air intake: under the hood or behind the grill?
I like that!
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#6 |
Registered User
Join Date: May 2009
Location: Motor City
Posts: 9,193
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Re: Air intake: under the hood or behind the grill?
Cool air at the grill is always better than hot underhood air.
K
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Chevrolet Flint Assembly 1979-1986 GM Full Size Truck Engineering 1986 - 2019 Intro from an Old Assembly Guy: http://67-72chevytrucks.com/vboard/s...d.php?t=342926 My Pontiac story: http://forums.maxperformanceinc.com/...d.php?t=560524 Chevelle intro: http://www.superchevy.com/features/s...hevy-chevelle/ |
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#7 |
Registered User
Join Date: Aug 2010
Location: Netherlands, The Hague
Posts: 1,518
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Re: Air intake: under the hood or behind the grill?
thank for all the replies! Thats what I thought.
@gchemist: very, very cool! alright. Did you design this yourself? or did you build it by yourself? I recognize some parts as being standard airduct material. But like the filterhouse? did you buy or build that?
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My dreamride / project:1977 GMC C15 Suburban In storage: Monster - 1974 GMC Suburban 25hundred Sold : Chevrolet Suburban K20 Silverado 1986 Guide: real HID projectors for 4x6 headlights link: DIY LED TAILLIGHTS Last edited by kikkegek; 09-08-2010 at 07:26 AM. |
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#8 | |
Registered User
Join Date: Aug 2010
Location: Netherlands, The Hague
Posts: 1,518
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Re: Air intake: under the hood or behind the grill?
Quote:
They sell this for my setup here in the netherlands: ![]() ![]()
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My dreamride / project:1977 GMC C15 Suburban In storage: Monster - 1974 GMC Suburban 25hundred Sold : Chevrolet Suburban K20 Silverado 1986 Guide: real HID projectors for 4x6 headlights link: DIY LED TAILLIGHTS |
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#9 |
Registered User
Join Date: Mar 2009
Location: MD
Posts: 417
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Re: Air intake: under the hood or behind the grill?
Do you get better fuel milage with the LPG system? Is the performance any better or worse than gasoline?
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2006 Silverado Crew Cab 1500 4x4 5.3L automatic 1986 M1008 CUCV 6.2L Detroit Diesel TH400 4.56 Detroit Locker rear NP208 1973 K20 "Silverado" 350ci, HEI, TH350, NP203 with 2wd conversion, A/C, power windows,tilt wheel, dual tanks. My '73ish K20 thread My 5yo son claims it as his. 1987 V20 Custom Deluxe 350 TH400 NP208 "farm truck" getting parted out. 2016 Nissan Altima grocery getter/commuter |
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#10 | |
Registered User
Join Date: Aug 2010
Location: Netherlands, The Hague
Posts: 1,518
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Re: Air intake: under the hood or behind the grill?
Quote:
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My dreamride / project:1977 GMC C15 Suburban In storage: Monster - 1974 GMC Suburban 25hundred Sold : Chevrolet Suburban K20 Silverado 1986 Guide: real HID projectors for 4x6 headlights link: DIY LED TAILLIGHTS |
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#11 | |
BAD BOW-Silverado XST
Join Date: May 2000
Location: Senior Member from Austin, TX
Posts: 6,431
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Re: Air intake: under the hood or behind the grill?
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#12 | |
Registered User
Join Date: Aug 2010
Location: Netherlands, The Hague
Posts: 1,518
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Re: Air intake: under the hood or behind the grill?
Quote:
do you also have a Quadrajet 4bl? if yes? which model ram-air-box is yours?
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My dreamride / project:1977 GMC C15 Suburban In storage: Monster - 1974 GMC Suburban 25hundred Sold : Chevrolet Suburban K20 Silverado 1986 Guide: real HID projectors for 4x6 headlights link: DIY LED TAILLIGHTS Last edited by kikkegek; 09-09-2010 at 02:05 AM. |
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