Home » Public Forums » GMCnet » air intake hose
| air intake hose [message #303173] |
Wed, 06 July 2016 15:48  |
lqqkatjon
Messages: 2324
Registered: October 2010
Location: St. Cloud, MN
Karma: 5
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one of the projects I have been not making a priority, is to replace my cold air intake hose. I had a 4" dryer vent, hooked between stock air cleaner, and a fiberglass Ram scoop (http://www.appliedgmc.com/prod.itml/icOid/574) in the grill.
that 4" dryer vent was a pain to take on and off to remove the air cleaner, and it was fragile, and just not a good thing. Then I replaced the original air compressor, and the new one ended up directly in the way of the hose routing i had, so I just tossed that hose in the garbage.
So I am trying to figure out best way to mount that ram air scoop, and run a hose to the air cleaner, and hopefully find a hose that when I want to pull the air cleaner off for any reason, It is easily done.
I am thinking of this guy:
https://www.amazon.com/Spectre-Performance-9751-Black-Duct/dp/B001OMM7HM/ref=sr_1_2?ie=UTF8&qid=1467837739&sr=8-2&keywords=automotive+inta ke+hose+4+inch
What have others done. I have heard someone say "corn picker hose" but have not come across where or what that is.
Jon Roche
75 palm beach
EBL EFI, manny headers, Micro Level, rebuilt most of coach now.
St. Cloud, MN
http://lqqkatjon.blogspot.com/
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| Re: air intake hose [message #303174 is a reply to message #303173] |
Wed, 06 July 2016 16:42  |
Carl S.
Messages: 4186
Registered: January 2009
Location: Tucson, AZ.
Karma: 13
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Glad you brought that up Jon. I've got the same issue with my aluminum dryer hose and would like something more suitable. I think it was Ken H that got some sort of hose at Tractor Supply, but I can't remember any specifics on it.
Carl Stouffer
'75 ex Palm Beach
Tucson, AZ.
Chuck Aulgur Reaction Arm Disc Brakes, Quadrabags, 3.70 LSD final drive, Lenzi knuckles/hubs, Dodge Truck 16" X 8" front wheels, Rear American Eagles, Solar battery charging. GMCSJ and GMCMI member
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| Re: air intake hose [message #303176 is a reply to message #303173] |
Wed, 06 July 2016 17:37 |
kingd
Messages: 592
Registered: June 2004
Karma: 2
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Not to start an argument but... A "cold air intake" is probably a reasonable idea, but I
would not recommend a "ram Air intake" on a carberated engine. I don't have wind tunnel testing to
prove this but I would be concerned about correctly sizing the main jets to have the correct
mixture at 45 MPH and lots of throttle and 65 MPH and cruise throttle but lots more RAM.
I have no idea how "factory muscle cars" that came with "Ram Air" dealt with this. I would
suspect a current vehicle with mixture monitoring via an oxygen sensor could deal with this
very well. Most modern vehicles I've seen make an effort to NOT use underhood air to feed the intake.
If it didn't make a difference getting cooler air I don't think the factories would bother
with it.
DAVE KING
lurker, wannabe
Toronto, Ontario, Canada
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| Re: [GMCnet] air intake hose [message #303177 is a reply to message #303173] |
Wed, 06 July 2016 17:47 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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Jon,
What I've used for many years is what's called "Picker Hose" -- possibly
the same as you call "corn picker hose" -- the nomenclature probably varies
with what's grown most in an area. Ours was probably stocked at the John
Deere dealer for cotton pickers. I suspect any farm harvesting equipment
dealer will have it in several sizes. Because it's subjected to very
severe use, it's sturdy stuff with a steel core covered in
rubber-impregnated fabric.
Nothing else I tried before, including hoses from the junkyard, worked well.
Ken H.
On Wed, Jul 6, 2016 at 4:48 PM, Jon Roche wrote:
> one of the projects I have been not making a priority, is to replace my
> cold air intake hose. I had a 4" dryer vent, hooked between stock air
> cleaner, and a fiberglass Ram scoop (
> http://www.appliedgmc.com/prod.itml/icOid/574) in the grill.
>
> that 4" dryer vent was a pain to take on and off to remove the air
> cleaner, and it was fragile, and just not a good thing. Then I replaced
> the
> original air compressor, and the new one ended up directly in the way of
> the hose routing i had, so I just tossed that hose in the garbage.
>
> So I am trying to figure out best way to mount that ram air scoop, and run
> a hose to the air cleaner, and hopefully find a hose that when I want to
> pull the air cleaner off for any reason, It is easily done.
>
>
> I am thinking of this guy:
>
> https://www.amazon.com/Spectre-Performance-9751-Black-Duct/dp/B001OMM7HM/ref=sr_1_2?ie=UTF8&qid=1467837739&sr=8-2&keywords=automotive+inta ke+hose+4+inch
>
>
> What have others done. I have heard someone say "corn picker hose" but
> have not come across where or what that is.
> --
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: air intake hose [message #303180 is a reply to message #303176] |
Wed, 06 July 2016 18:39 |
mrgmc3
Messages: 210
Registered: September 2013
Location: W Washington
Karma: 2
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Senior Member |
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kingd wrote on Wed, 06 July 2016 17:37Not to start an argument but... A "cold air intake" is probably a reasonable idea, but I
would not recommend a "ram Air intake" on a carberated engine. I don't have wind tunnel testing to
prove this but I would be concerned about correctly sizing the main jets to have the correct
mixture at 45 MPH and lots of throttle and 65 MPH and cruise throttle but lots more RAM.
I have no idea how "factory muscle cars" that came with "Ram Air" dealt with this.
The temperature difference will have a greater impact on a carbureted engine than any "ram" effect. Carburetors are "volume" devices and dispense fuel based on the speed of air across the venturi, and the resulting pressure drop. More airflow = more fuel flow, so additional air gets proportionally additional fuel. The cooler outside air is denser, and all else being equal, would have the effect of a slight drop in elevation, and a slight amount of enleanment. You can use the ideal gas law to calculate the approx. effect based on whatever you think or measure the "new" temperature to be.
And outside air is used by OEMs for just this reason. The cooler air is a couple "free" HP, but only a couple.
Chris Geils - Twin Cities / W Wa
1978 26' Kingsley w/ very few mods; PD9040, aux trans cooler, one repaint in stock colors, R134a, Al rad, Alcoas, 54k mi
[Updated on: Sat, 09 July 2016 22:46] Report message to a moderator |
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| Re: [GMCnet] air intake hose [message #303182 is a reply to message #303180] |
Wed, 06 July 2016 18:50 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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You might look on our sight under Engines and you'll find our remote air
filtr kit.
People order the seperate parts from the kit to set up things the way they
want.
On Wed, Jul 6, 2016 at 4:39 PM, Chris Geils
wrote:
> kingd wrote on Wed, 06 July 2016 17:37
>> Not to start an argument but... A "cold air intake" is probably a
> reasonable idea, but I
>> would not recommend a "ram Air intake" on a carberated engine. I don't
> have wind tunnel testing to
>> prove this but I would be concerned about correctly sizing the main jets
> to have the correct
>> mixture at 45 MPH and lots of throttle and 65 MPH and cruise throttle
> but lots more RAM.
>> I have no idea how "factory muscle cars" that came with "Ram Air" dealt
> with this.
>
>
> The temperature difference will have a greater impact on a carbureted
> engine than any "ram" effect. Carburetors are "volume" devices and dispense
> fuel based on the speed of air across the venturi, and the resulting
> pressure drop. More airflow = more fuel flow, so additional air gets
> proportionally additional fuel. The cooler outside air is denser, and all
> else being equal, would have the effect of a slight drop in elevation, and
> a slight amount of enleanment. You can use the ideal gas law to calculate
> the approx. effect based on whatever you think or measure the "new"
> temperature to be.
>
> And outside air is used by OEMs for just this reason. The cooler air is s
> couple "free" HP, but only a couple.
> --
> Chris Geils - Twin Cities
> 1978 26' Kingsley w/ very few mods; Headers, Progressive Dynamics 9040,
> aux trans cooler, one repaint in stock colors, R134a, Al rad, 49k mi
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: [GMCnet] air intake hose [message #303186 is a reply to message #303173] |
Wed, 06 July 2016 20:45 |
Kosier
Messages: 834
Registered: February 2008
Karma: 1
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Senior Member |
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John,
I have that very hose on my coach, along with their remote air cleaner
element and carb bonnet.
This is on a Cadillac which allowed me to only have a small bump in the
engine lid. I have the
element located in front of the LH inner fender with an assortment of
fittings and connectors.
Gary Kosier
77PB w/500Cad
Newark, Ohio
--------------------------------------------------
From: "Jon Roche"
Sent: Wednesday, July 06, 2016 4:48 PM
To:
Subject: [GMCnet] air intake hose
> one of the projects I have been not making a priority, is to replace my
> cold air intake hose. I had a 4" dryer vent, hooked between stock air
> cleaner, and a fiberglass Ram scoop
> (http://www.appliedgmc.com/prod.itml/icOid/574) in the grill.
>
> that 4" dryer vent was a pain to take on and off to remove the air
> cleaner, and it was fragile, and just not a good thing. Then I replaced
> the
> original air compressor, and the new one ended up directly in the way of
> the hose routing i had, so I just tossed that hose in the garbage.
>
> So I am trying to figure out best way to mount that ram air scoop, and run
> a hose to the air cleaner, and hopefully find a hose that when I want to
> pull the air cleaner off for any reason, It is easily done.
>
>
> I am thinking of this guy:
> https://www.amazon.com/Spectre-Performance-9751-Black-Duct/dp/B001OMM7HM/ref=sr_1_2?ie=UTF8&qid=1467837739&sr=8-2&keywords=automotive+inta ke+hose+4+inch
>
>
> What have others done. I have heard someone say "corn picker hose" but
> have not come across where or what that is.
> --
> Jon Roche
> 75 palm beach
> St. Cloud, MN
> http://lqqkatjon.blogspot.com/
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
_______________________________________________
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| Re: air intake hose [message #303234 is a reply to message #303173] |
Thu, 07 July 2016 15:22 |
KB
Messages: 1262
Registered: September 2009
Karma: 0
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Senior Member |
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I recently found this stuff at home depot:
http://www.homedepot.com/p/FLEX-Drain-4-in-x-21-in-Polypropylene-Flexible-Elbow-Connector-57010/202745379
I haven't tried it as an engine intake, but it was perfect for making a fresh air vent for the cockpit,
and it's really inexpensive. There are various couplers and end pieces available for it too.
Karen
1975 26'
lqqkatjon wrote on Wed, 06 July 2016 13:48one of the projects I have been not making a priority, is to replace my cold air intake hose. I had a 4" dryer vent, hooked between stock air cleaner, and a fiberglass Ram scoop (http://www.appliedgmc.com/prod.itml/icOid/574) in the grill.
that 4" dryer vent was a pain to take on and off to remove the air cleaner, and it was fragile, and just not a good thing. Then I replaced the original air compressor, and the new one ended up directly in the way of the hose routing i had, so I just tossed that hose in the garbage.
So I am trying to figure out best way to mount that ram air scoop, and run a hose to the air cleaner, and hopefully find a hose that when I want to pull the air cleaner off for any reason, It is easily done.
I am thinking of this guy:
https://www.amazon.com/Spectre-Performance-9751-Black-Duct/dp/B001OMM7HM/ref=sr_1_2?ie=UTF8&qid=1467837739&sr=8-2&keywords=automotive+inta ke+hose+4+inch
What have others done. I have heard someone say "corn picker hose" but have not come across where or what that is.
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| Re: air intake hose [message #303361 is a reply to message #303347] |
Sun, 10 July 2016 11:47 |
tphipps
Messages: 3005
Registered: August 2004
Location: Spanish Fort, AL
Karma: 9
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Senior Member |
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Karen, radiator cap is a stant (I believe) and easy to remove. One on my coach.
Tom, MS II
2012 Phoenix Cruiser model 2552
KA4CSG
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| Re: air intake hose [message #304882 is a reply to message #303173] |
Thu, 04 August 2016 10:18 |
lqqkatjon
Messages: 2324
Registered: October 2010
Location: St. Cloud, MN
Karma: 5
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Senior Member |
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FYI.
I did order and install the Spectre air intake hose:
https://www.amazon.com/Spectre-Performance-9751-Black-Duct/dp/B001OMM7HM/ref=sr_1_2?ie=UTF8&qid=1470323692&sr=8-2&keywords=intake+hose+4%2 2
It worked pretty well. Time will tell, but i think it should last. The end pieces are rubber and pliable, but were the right size for the air horn, and the intake. It was just the right length to reach to where i put my air duct in the middle row far driver side of the grill. if you were going to try to reach under the bumper, it may come up a little short. It accordions really nice. I ended up routing it to the driver side of the aluminum tri-strut that goes from frame to the body, then forward. I do not run fender liners, so I am not sure if there is a clearance problem if you run fender liners. trying to run it between that strut and the alternator, it just did not line up right. As it sits, the stupid air intake aims itself right into that strut, so it is in the way a little bit how I have it.
used two quick release hose clamps to hold it to the air duct, and the intake assembly:
https://www.amazon.com/Ideal-Air-380122-Release-Stainless-Clamps/dp/B00CJIG10O/ref=sr_1_2?ie=UTF8&qid=1470323725&sr=8-2&keywords=quick+hos e+clamps
Jon Roche
75 palm beach
EBL EFI, manny headers, Micro Level, rebuilt most of coach now.
St. Cloud, MN
http://lqqkatjon.blogspot.com/
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| Re: air intake hose [message #304892 is a reply to message #303173] |
Thu, 04 August 2016 12:23 |
mrgmc3
Messages: 210
Registered: September 2013
Location: W Washington
Karma: 2
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Senior Member |
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Something to consider if you are running a cold air inlet hose and a stock air cleaner; the "thermac" system will try to defeat your efforts. There is a little vacuum motor on the air cleaner snorkel that is fed by a vacuum hose. That hose goes to a temp sensor inside the air cleaner, then on to the vacuum source (manifold). The system tries to maintain an inlet air temperature of about 100F. The temp sensor in the air cleaner manipulates the vacuum signal to the snorkel motor to accomplish this, by varying the warm or cold air source entering the inlet duct. The two sources of inlet air are the open end of the snorkel (or cold outside air if so equipped) and the exhaust manifold shroud and hot air tube, if equipped. The design purpose is to allow early warm up of inlet air after a cold start, as well as to pre-heat inlet air during periods when carburetor icing can occur (32-40F and high humidity).
The bottom line for this explanation is that if you are running cold air to the snorkel, but do not remove the normally-closed thermac motor you will ingest very little cold air! If the thermac motor has its vacuum source removed it will pull air from the exhaust-heated inlet all the time. You can bypass the temp sensor and run straight vacuum to the thermac motor, but you'll get heated air at WOT, as vacuum drops. The only sure fire way to get snorkel outside air is to remove the thermac motor and wire the inlet diverter valve open, or use an air cleaner without this device.
Chris Geils - Twin Cities / W Wa
1978 26' Kingsley w/ very few mods; PD9040, aux trans cooler, one repaint in stock colors, R134a, Al rad, Alcoas, 54k mi
[Updated on: Thu, 04 August 2016 12:25] Report message to a moderator |
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| Re: air intake hose [message #304916 is a reply to message #303173] |
Thu, 04 August 2016 20:49 |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
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Senior Member |
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Sort of. With working stock setup, when you floor it vac drops and door OPENS to cold air by spring giving cold air max power when needed. The default is open. Leaving it stock gives you best of both ---faster warm up--- tolerates leaner part throttle setup --- no icing potential--cold air POWER when WOT.
John Lebetski
Woodstock, IL
77 Eleganza II
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