65 66 67 OLDSMOBILE F85 CUTLASS 88 REMAN 2BBL CARB

65superrocket · December 14th, 2008, 11:31 AM

Hello new to the site. Was looking at a remanufactured carb on e-bay as a spare and was wondering if any one knew what the tube coming out the top side of the carb throat is. My original 2G Rochester does not have this. My car is a 65 OLDS DELTA 88. 425 HI COMP ENGINE.Here's the link. Thanks.

http://cgi.ebay.com/ebay motors/NEW-65-66-67-OLDSMOBILE-F85-CUTLASS-88-REMAN-2BBL-CARB_W0QQcmdZViewItemQQ_trksidZp1713Q2em153Q2el126 2QQcategoryZ33550QQihZ026QQitemZ390016604489QQtcZp hoto

66 Olznut · December 14th, 2008, 11:39 AM

Looks like a float bowl vent tube to me......

Danny Wiseley · December 14th, 2008, 12:22 PM

I see the bowl vent tube (with angle cut) too. Are you referring to the short tube with the black cap on the rear of the carburetor? That's a "clean-air" tap for the choke. Air is drawn from that connector through the tubing in the choke stove in the manifold, then over the bimetallic spring in the choke housing by a vacuum passage behind the spring.
DW

65superrocket · December 14th, 2008, 02:54 PM

Yes, it's the tube at the back of the carb with the black cap. So this is a clean air intake pipe for the choke? My original carb does not have this. The choke stove pipe and plate connect to the intake manifold then to the choke. Is anythng suppose to connect to this fresh air pipe? or is it just a vent to draw air in? Thanks.

Danny Wiseley · December 14th, 2008, 10:21 PM

The later models used that connection as a source of clean air for the choke. The air flows out through that tube, down to the choke stove, then up to the choke coil, then through the port leading to vacuum below the butterflies.

65superrocket · December 15th, 2008, 06:52 PM

If I leave the cap on this pipe can I connect this carb as my original is connected with the threaded stove fitting at the choke? Thanks.

December 14th, 2008, 11:31 AM	#1 (permalink)
65superrocket Registered User Join Date: Sep 2008 Posts: 17	65 66 67 OLDSMOBILE F85 CUTLASS 88 REMAN 2BBL CARB Hello new to the site. Was looking at a remanufactured carb on e-bay as a spare and was wondering if any one knew what the tube coming out the top side of the carb throat is. My original 2G Rochester does not have this. My car is a 65 OLDS DELTA 88. 425 HI COMP ENGINE.Here's the link. Thanks. http://cgi.ebay.com/ebay motors/NEW-65-66-67-OLDSMOBILE-F85-CUTLASS-88-REMAN-2BBL-CARB_W0QQcmdZViewItemQQ_trksidZp1713Q2em153Q2el126 2QQcategoryZ33550QQihZ026QQitemZ390016604489QQtcZp hoto

December 14th, 2008, 11:39 AM	#2 (permalink)
66 Olznut Ca's Only Official OLZNUT Join Date: Mar 2007 Location: Sunny So Cal Posts: 120	Looks like a float bowl vent tube to me...... __________________ '66 442 in the body shop now, 400 E block waiting to go in.........

December 14th, 2008, 12:22 PM	#3 (permalink)
Danny Wiseley Registered User Join Date: Mar 2007 Location: West of Lubbock, TX Posts: 160	I see the bowl vent tube (with angle cut) too. Are you referring to the short tube with the black cap on the rear of the carburetor? That's a "clean-air" tap for the choke. Air is drawn from that connector through the tubing in the choke stove in the manifold, then over the bimetallic spring in the choke housing by a vacuum passage behind the spring. DW Last edited by Danny Wiseley; December 14th, 2008 at 01:21 PM.. Reason: To complete reply after interruption. . .

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December 14th, 2008, 02:54 PM	#4 (permalink)
65superrocket Registered User Join Date: Sep 2008 Posts: 17	Yes, it's the tube at the back of the carb with the black cap. So this is a clean air intake pipe for the choke? My original carb does not have this. The choke stove pipe and plate connect to the intake manifold then to the choke. Is anythng suppose to connect to this fresh air pipe? or is it just a vent to draw air in? Thanks.

December 14th, 2008, 10:21 PM	#5 (permalink)
Danny Wiseley Registered User Join Date: Mar 2007 Location: West of Lubbock, TX Posts: 160	The later models used that connection as a source of clean air for the choke. The air flows out through that tube, down to the choke stove, then up to the choke coil, then through the port leading to vacuum below the butterflies.

December 15th, 2008, 06:52 PM	#6 (permalink)
65superrocket Registered User Join Date: Sep 2008 Posts: 17	If I leave the cap on this pipe can I connect this carb as my original is connected with the threaded stove fitting at the choke? Thanks.