Register or Log In To remove these advertisements. |
|
|
|
Thread Tools | Display Modes |
02-02-2014, 05:53 PM | #1 |
Registered User
Join Date: Aug 2010
Location: Netherlands, The Hague
Posts: 1,518
|
Cool air in 73-74 model engine bay
he guys,
I recently went from a 86 Chevrolet Suburban to a 74 GMC Suburban. In the 86 I had an opening behind the grill where I hooked up the cold air for the air cleaner: the hole on the left in this pic had this thing in it but the 74 has no openings in the core support behind the grill. I have taken the air cleaner from my 86 hoping to hook the hose up again...but where do you guys get your cold air in these models?
__________________
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 |
02-02-2014, 07:49 PM | #2 |
Registered User
Join Date: Feb 2013
Location: Houston, TX
Posts: 89
|
Re: Cool air in 73-74 model engine bay
Ha is that what those holes were for? Drawing air into the engine for the air intake? I always wondered what the reason was for them. But If there is no spot on the core support to hook up the intake hose, you could just run a aftermarket air cleaner?
|
02-02-2014, 09:31 PM | #3 |
18 Till I Die
Join Date: Mar 2005
Location: Alberta, Canada
Posts: 1,522
|
Re: Cool air in 73-74 model engine bay
Cut a new hole. Holesaw?
__________________
2011 GMC Acadia 1969 GMC BBC LS7 2007 GMC Crew Duramax 1987 Camaro Iroc 350 Tuned Port Injection 42000Km 1987 Chevrolet Silverado 350 TBI 1987 Chevrolet Silverado 350 TBI(yes 2) Take me drunk, I'm too home... |
02-03-2014, 03:00 AM | #4 | |
Registered User
Join Date: Aug 2010
Location: Netherlands, The Hague
Posts: 1,518
|
Re: Cool air in 73-74 model engine bay
Quote:
the problem I have with this type is that they take in the air from under the hood. I run 100% propane all the time and propane doesnt like heat. It expands a lot faster then gasoline. So the more it expands, the worse the filling of the cilinders will be, this loss in power and economy. that is why I like to have cooler air from behind the grill or some other place. Especially in summertime in a traffic jam on a warm black road. @kelsfine69: I would prefer not to cut any holes in my car or any part of it if I dont have to. That is why I am trying to find out how the original cars got their cool air.
__________________
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 |
|
02-03-2014, 04:00 AM | #5 |
Registered User
Join Date: Mar 2013
Location: Netherlands
Posts: 116
|
Re: Cool air in 73-74 model engine bay
Hi Jochen.
Didn't the older models ('73&'74) used snorkels as a filter element? That will mean there is no cold air supply from a hole or tube. As you are running on propane, just cut a hole in the core support like the newer originals. Just so that you can use the stock 'thing' in it. |
02-03-2014, 04:02 AM | #6 |
Registered User
Join Date: Aug 2010
Location: Netherlands, The Hague
Posts: 1,518
|
Re: Cool air in 73-74 model engine bay
he Remon! nice to see you here...
what do you mean by snorkel?
__________________
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 |
02-03-2014, 04:11 AM | #7 |
Registered User
Join Date: Mar 2013
Location: Netherlands
Posts: 116
|
Re: Cool air in 73-74 model engine bay
|
02-03-2014, 10:52 AM | #8 |
Registered User
Join Date: Aug 2010
Location: Netherlands, The Hague
Posts: 1,518
|
Re: Cool air in 73-74 model engine bay
juk, no...that will still get you warm air in a traffic jam under the hood...
I dont really wanna hack into the from core support, but I think its the only way yo go... will be nice summer project.
__________________
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 |
02-03-2014, 11:04 AM | #9 |
The One And Only !!!
Join Date: Jan 2007
Location: Hole in the woods Florida
Posts: 4,567
|
Re: Cool air in 73-74 model engine bay
My all orginal 74 has a round stamped area next to each headlight where it can be cut out for your cold air snorkel to slide into, Look a little closer......
__________________
93 Jeep XJ 88 Buick La Sabra Toys; 88 TA-GTA in the works.... 97 GMC Ext. Cab 502 Crate 5 Spd......Sucks Gas But Haulz Azz ! The primary function of an Engineer is to make it difficult for the Fabricator and impossible for the Mechanic. "Why go out preserved when you can go out beat up, worn out, sliding in sideways screaming, Holy Sh!t What A Ride" !!!
|
02-03-2014, 11:14 AM | #10 |
Account Suspended
Join Date: Apr 2009
Location: hazard, ky
Posts: 1,674
|
Re: Cool air in 73-74 model engine bay
you can run ducts under the bumper
|
02-03-2014, 11:40 AM | #11 |
Registered User
Join Date: Aug 2010
Location: Netherlands, The Hague
Posts: 1,518
|
Re: Cool air in 73-74 model engine bay
this is a pic from previous owner when he was restoring it several years ago...no holes, see...no prestamped holes either:
__________________
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 |
02-03-2014, 01:51 PM | #12 |
Registered User
Join Date: Feb 2013
Location: Cary, NC
Posts: 816
|
Re: Cool air in 73-74 model engine bay
Can you run the intake over to the corner of the fender where the battery is or is that still going to be too hot? How different are the newer core supports compared to the pre 80's?
__________________
Austin 1996 Chevrolet K1500 Silverado 1979 Chevrolet K10 Scottsdale - Carolina K10 - My 4.8L Twin turbo build - Project Short Stroke - Instagram - TheBlueBomber1996 |
02-03-2014, 04:22 PM | #13 |
Registered User
Join Date: Apr 2001
Location: DALLAS,TX
Posts: 22,066
|
Re: Cool air in 73-74 model engine bay
My old 74 had the same 'round stamped areas' in between the headlights & radiator.
__________________
67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. |
02-03-2014, 04:29 PM | #14 |
Registered User
Join Date: Aug 2010
Location: Netherlands, The Hague
Posts: 1,518
|
Re: Cool air in 73-74 model engine bay
Maybe the GMCs just dont?
Or I Got te super custom. Maybe those holes are in the fancier editions?
__________________
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 |
02-03-2014, 05:00 PM | #15 |
www.73-87chevytrucks.com
Join Date: Dec 1999
Location: Birmingham, AL
Posts: 6,935
|
Re: Cool air in 73-74 model engine bay
1973-1975 didn't have cold air from the core support. They just had a fluted end on the air cleaner.
1976 introduced the cold air snorkle/intake, or Outside Air...
__________________
Chris Lucas 1973 Chevy C-10 1978 GMC Jimmy (2WD) - SOLD 1987 R10 twin turbo LS 1991 R3500 SRW CrewCab 1985 K5 diesel swapped project 1989 K5 2WD conversion w/ Vette susp Project Captkaos Customs 73-87chevytrucks.com |
02-03-2014, 07:46 PM | #16 | |
The One And Only !!!
Join Date: Jan 2007
Location: Hole in the woods Florida
Posts: 4,567
|
Re: Cool air in 73-74 model engine bay
Quote:
Or just maybe, Your rig was wrecked at some point and another core installed ? My truck is a plan jane C10 work truck, My new aftermarket replacement core has the same stamped areas on both sides as well.....
__________________
93 Jeep XJ 88 Buick La Sabra Toys; 88 TA-GTA in the works.... 97 GMC Ext. Cab 502 Crate 5 Spd......Sucks Gas But Haulz Azz ! The primary function of an Engineer is to make it difficult for the Fabricator and impossible for the Mechanic. "Why go out preserved when you can go out beat up, worn out, sliding in sideways screaming, Holy Sh!t What A Ride" !!!
|
|
02-03-2014, 09:17 PM | #17 |
BMW & ASE Master Certified
Join Date: Feb 2004
Location: Houston, Texas
Posts: 1,266
|
Re: Cool air in 73-74 model engine bay
I did dual intake air box out of some 4" flexible drier vent tubing and plastic gutter drain adapter.. Riveted it to my air box once I cut it and shaped it to fit the factory cleaner... Basically replicated ramair box but without spending 300$. The other end if the drier vent went to the factory plastic round adapter in the core support with the front face either removed or holes drilled in it.
I couldn't use the setup with the 90 suburban clip as it doesn't have those holes.
__________________
1987 Silverado - L83 5.3 w/ 6L80e ,A/C,P/W,P/L,TILT, HID projectors, Wilwood C-10 Pro Spindles w/ 2018 silverado front brakes & C-5 Corvette Rear Disc Brakes 1999 BMW 528i - 5.7 LS1 w/ 4l60e, Ford 8.8 IRS w31 spline posi & FX-r projector retrofit New project: 2006 BMW x5 6cyl AWD to L83 6l80e 4wd to 2WD / RWD A poor man buy's it twice finally got my domain name back, 87chevy.com.... site rework in progress |
Bookmarks |
Thread Tools | |
Display Modes | |
|
|