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Author
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Topic: U-shaped tube on the headers?
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streetstang67
Gearhead Posts: 396
From: SC, USA
Registered: Nov 2002
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posted 02-15-2004 09:03 PM
   
I was noticing how long it takes for my car to warm up and wondered if this tube on the header with nothing hooked to it is supposed to be used to help the car warm up? Its a small (mabye 3/8") U-shaped tube welded to the back primary on the pass. side. What is this supposed to be for?------------------
'67 coupe: 289 bored .030 over, c-4 tranny
Holley 600 carb, edelbrock performer intake, Crane XR-i ignition, hooker comp headers, dual flowmaster exhuast C-4 (stock) 3.55s with traclok
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Fastymz
Moderator Posts: 14201
From: Reno Nv USA MEM#1240
Registered: Apr 2001
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posted 02-15-2004 09:08 PM
There would another tube thats runs from the exhaust manifold to the stock air cleaner which would have a flap that would allow the air going into the carb to be warmed from the heat of the exhaust manifold.------------------
SCOOP oddly obsessed with big scoops on little Mustangs 65 coupe,351w,C4,Big Boss 429 hood scoop,8" 3.40 TracLoc. My Pics
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streetstang67
Gearhead Posts: 396
From: SC, USA
Registered: Nov 2002
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posted 02-15-2004 09:21 PM
How can I hook all that up? Is it useful? Should I do it?
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ted
Journeyman Posts: 37
From: Central Texas
Registered: May 2003
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posted 02-15-2004 10:31 PM
Just 3/8"? Sounds like it would be the "stove" for the automatic choke that would allow warm air to be pulled up the carb to help the automatic choke's bimetal coil heat up quicker. A lot of the factory carbs and many of the Holley's had this feature incorporated within them.Usually the hose running to the air cleaner with a flapper valve would be much larger (on the order of 1? or 2") and that is used primarily to prevent icing in the carburetor during the initial warmup period or under steady cruise conditions where the dewpoint temperature is greater than ambient temperature.
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Rory McNeil
Gearhead Posts: 1311
From: Surrey, B.C. Canada
Registered: Nov 2000
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posted 02-16-2004 02:15 AM
Yeah, it sounds like the same U shaped tube that the Hooker headers on my old 428CJ 70 Mach 1 had. It was welded to the last header tube on the passenger side, close to the flange. It`s meant to replace the holes that the stock exh. manifolds had to provide heated air for the automatic choke. The only other thing it`s usefull for is tearing skin of your wrists while changing spark plugs!------------------
78 Fairmont 428 4 speed 10.20@130mph
80 Fairmont 302 5 speed 12.8@105mph
85 Mustang NHRA Stocker 302 5speed. 13.04@101mph
59 Meteor (Canadian Ford) 2 dr sedan 332, auto
74 F350 ramp truck 390 4spd
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kcode
Gearhead Posts: 2760
From: alvaton,ky,usa Suburb of Bowling Green, M&M #79, MCA #29208
Registered: Jun 99
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posted 02-16-2004 01:12 PM
Rory is correct, the U tube will only work with the old style heat actuated chokes for the carb. One end went to the fitting on the carb that went to the choke coil, the other went to a source that would suck filtered air. Mike
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Fastymz
Moderator Posts: 14201
From: Reno Nv USA MEM#1240
Registered: Apr 2001
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posted 02-16-2004 03:25 PM
Sorry guys I missed this part  "Its a small (mabye 3/8")". ------------------
SCOOP oddly obsessed with big scoops on little Mustangs 65 coupe,351w,C4,Big Boss 429 hood scoop,8" 3.40 TracLoc. My Pics
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streetstang67
Gearhead Posts: 396
From: SC, USA
Registered: Nov 2002
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posted 02-16-2004 04:49 PM
I have a holley with electric choke and a dress up kit. What should I do?------------------
'67 coupe: 289 bored .030 over, c-4 tranny
Holley 600 carb, edelbrock performer intake, Crane XR-i ignition, hooker comp headers, dual flowmaster exhuast C-4 (stock) 3.55s with traclok
IP: Logged |
Fastymz
Moderator Posts: 14201
From: Reno Nv USA MEM#1240
Registered: Apr 2001
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posted 02-16-2004 04:51 PM
How long does it take your car to warm now ?
Does it not run good until it gets cold or why do you wnat it to warm up faster ?------------------
SCOOP oddly obsessed with big scoops on little Mustangs 65 coupe,351w,C4,Big Boss 429 hood scoop,8" 3.40 TracLoc. My Pics
IP: Logged |
streetstang67
Gearhead Posts: 396
From: SC, USA
Registered: Nov 2002
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posted 02-16-2004 07:25 PM
It takes forever for the choke to turn off, that the reason I was wondering. I was pretty sure that tube was used for turning the choke off sooner, and thats what I need to do.------------------
'67 coupe: 289 bored .030 over, c-4 tranny
Holley 600 carb, edelbrock performer intake, Crane XR-i ignition, hooker comp headers, dual flowmaster exhuast C-4 (stock) 3.55s with traclok
IP: Logged |
Fastymz
Moderator Posts: 14201
From: Reno Nv USA MEM#1240
Registered: Apr 2001
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posted 02-16-2004 07:44 PM
You can adjust your electric choke to go off, or open sooner. Does the motor get warm now before the choke is off, or open ?
If so then the choke needs to be adjusted.------------------
SCOOP oddly obsessed with big scoops on little Mustangs 65 coupe,351w,C4,Big Boss 429 hood scoop,8" 3.40 TracLoc. My Pics [This message has been edited by Fastymz (edited 02-16-2004).]
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streetstang67
Gearhead Posts: 396
From: SC, USA
Registered: Nov 2002
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posted 02-16-2004 08:28 PM
it needs to be adjusted, how do I do that?
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Fastymz
Moderator Posts: 14201
From: Reno Nv USA MEM#1240
Registered: Apr 2001
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posted 02-16-2004 08:35 PM
First does the choke stay closed after the motor is warmed up ?
If so there is a black dail on the choke side of the carb. It should have the words richer and leaner tuning the the dail will make the choke open more soon or stay closed longer.But if the motor is not warm yet and the choke opens to soon, it will stumble alittle until it warms up.------------------
SCOOP oddly obsessed with big scoops on little Mustangs 65 coupe,351w,C4,Big Boss 429 hood scoop,8" 3.40 TracLoc. My Pics
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