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Reload this Page Tube running to carb

Carburetors Carb discussion and questions. Upgrading a Third Gen carburetor, swapping TBI to carburetor, or TPI to carburetor? Need LG4 or H.O. info? Post it here.

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Old 06-06-2009, 06:02 PM   #1
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Join Date: Oct 2002
Location: NJ
Posts: 130
Car: '89 Camaro Rs/ '87 Z28
Engine: 305 c.i. TBI/ 305 c.i. 4bbl
Transmission: 700r4/T5
Axle/Gears: 3.73 posi/ 3.73 posi

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Tube running to carb
I recently bought an 87 z28 305 T5 Carbed. What is the tube that runs from under the air cleaner to the passenger side fender? After the car is turned off sometimes it will blow air through it up to the carb. Whats the purpose of this? Emission related garbage like all the other garbage under the hood? I hate all the clutter haha.
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Old 06-07-2009, 01:47 AM   #2
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Join Date: Mar 2000
Location: Littleton, CO USA
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Car: 82 Berlinetta(2)/57 Bel Air
Engine: 86 LG4-> ZZ3(LS1)/mild 396
Transmission: TH700(T56)/TH400
Axle/Gears: 10-bolt 3.23(4.10)/8.2" 10-bolt4.11

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It's to help prevent boiling of the fuel in the carb bowl when the engine is shut off hot. With the high under-hood temperatures of our cars, it's a pretty good thing to have.
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Old 06-07-2009, 12:31 PM   #3
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Join Date: Oct 2002
Location: NJ
Posts: 130
Car: '89 Camaro Rs/ '87 Z28
Engine: 305 c.i. TBI/ 305 c.i. 4bbl
Transmission: 700r4/T5
Axle/Gears: 3.73 posi/ 3.73 posi

Classifieds Rating: (1)
Re: Tube running to carb
Quote:
Originally Posted by five7kid View Post
It's to help prevent boiling of the fuel in the carb bowl when the engine is shut off hot. With the high under-hood temperatures of our cars, it's a pretty good thing to have.
Ok so its something uselful. thats surprising, haha. Thanks for the info!
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Old 06-29-2009, 11:50 PM   #4
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Join Date: Oct 2002
Location: NJ
Posts: 130
Car: '89 Camaro Rs/ '87 Z28
Engine: 305 c.i. TBI/ 305 c.i. 4bbl
Transmission: 700r4/T5
Axle/Gears: 3.73 posi/ 3.73 posi

Classifieds Rating: (1)
Re: Tube running to carb
One last question about it. Occasionally it will seem to run forever unless I turn the IGN to acc and then to off a couple times. that will eventually shut it off. Does it usually run for a long time. Im just worried if it would drain the battery
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Old 06-30-2009, 04:25 PM   #5
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Join Date: Mar 2000
Location: Littleton, CO USA
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Car: 82 Berlinetta(2)/57 Bel Air
Engine: 86 LG4-> ZZ3(LS1)/mild 396
Transmission: TH700(T56)/TH400
Axle/Gears: 10-bolt 3.23(4.10)/8.2" 10-bolt4.11

Classifieds Rating: (3)
It runs until the coolant temperature gets below the switch preset point. On mine, the switch is in the heater hose coming off the water pump. Since coolant isn't circulating except by cooling effect (cooler water more dense, goes down, etc.), it can take awhile for the temp to drop, especially if you shut it off hot (the radiator fan doesn't come on until 238 degrees F).

FWIW, mine never ran the battery down.
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Old 07-02-2009, 06:08 PM   #6
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Join Date: Oct 2002
Location: NJ
Posts: 130
Car: '89 Camaro Rs/ '87 Z28
Engine: 305 c.i. TBI/ 305 c.i. 4bbl
Transmission: 700r4/T5
Axle/Gears: 3.73 posi/ 3.73 posi

Classifieds Rating: (1)
Re: Tube running to carb
ok thanks for the info! Gives me a little peace of mind haha
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Old 07-02-2009, 06:51 PM   #7
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Car: 1987 Camaro LT
Engine: LG4 305 4bbl. w/dual snorkle
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Re: Tube running to carb
Wow the blower motor on an 87. First one I now know about. I knew about the L69's with them.
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Old 07-02-2009, 06:54 PM   #8
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Join Date: Jun 2006
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Car: 1987 Camaro LT
Engine: LG4 305 4bbl. w/dual snorkle
Transmission: 700R4
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Re: Tube running to carb
http://www.thirdgen.org/techboard/hi...lower-kit.html (L69 Blower Kit)

Yea the above thread has a picture of the blower unit you are talking about. It's pretty cool.
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Reload this Page Tube running to carb
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