|
Sponsored Links (Register now to hide all advertisements) |
|
|
Thread Tools | Display Modes |
03-04-2011, 02:05 PM | #1 |
Senior Member
Join Date: May 2010
Location: Cincinnati, OH
Posts: 209
|
Dual updraft carburetors
There's a couple of recent threads related to Webers, Strombergs, dual Strombergs, etc., but to me the look of dual updrafts has always been the stuff. They look like a bargain when you consider the price of the manifold and one or two Tillotsons. I've also heard that they're too much for a stock motor. Who has experience with dual updrafts? Whaddaya think?--Giles in Cincinnati
|
03-04-2011, 02:14 PM | #2 |
Senior Member
Join Date: May 2010
Location: Jordan, MN
Posts: 1,411
|
Re: Dual updraft carburetors
Giles,
I am building an era "hop up" and have a dual updraft manifold with two "B" Zenith carbs set up by Dave Renner @ Renner's Corner. Prior to jetting them, he asked a lot of questions as to my valves, cam, displacement and my expectations of operation. Dave's comment was that the dual set-up was a bit to much carb for my engine with stock jetting. I do have 1.7" intake valves, enlarged intake passages and a .340 lift cam from Bill Stipe. I have yet to put it on the road but it ran pretty well on the engine stand during break-in. I'll know more this spring. Good Day! Dave in MN |
Sponsored Links (Register now to hide all advertisements) |
|
03-04-2011, 03:51 PM | #3 |
Senior Member
Join Date: May 2010
Location: Suttons Bay, Mich.
Posts: 3,392
|
Re: Dual updraft carburetors
I would love to see your setup Dave, how are you running the gas lines? Also the choke rod can't be used right?
__________________
Respecting and Resurrecting Ford Model A's. |
03-04-2011, 03:56 PM | #4 |
Senior Member
Join Date: May 2010
Location: Jordan, MN
Posts: 1,411
|
Re: Dual updraft carburetors
Until I get the engine in the car I am not sure how I will plumb it permanent...I just used rubber gasline for the break-in period. I'll put your name in my log and email you something when I get it installed. If I fall behind, I will put the engine in my driver for the summer so I can get it through the full break-in.
Choke rod: Only one carb is used to choke and adjust the mixture to start. The other GAV is set up with a short adjustment fitting that allows you to adjust the mixture...with the hood open. Dave in MN |
03-04-2011, 04:34 PM | #5 |
Senior Member
Join Date: May 2010
Posts: 265
|
Re: Dual updraft carburetors
I am running dual Zenith updraft carbs on my Slantwindshield. Tour without any problems, high comp head, lightned f/w, and a Mitchell. Post you e-mail and I will forward pictures. Howard
|
03-04-2011, 11:42 PM | #6 |
Senior Member
Join Date: Oct 2010
Posts: 837
|
Re: Dual updraft carburetors
Sponsored Links (Register now to hide all advertisements)
|
03-04-2011, 11:55 PM | #7 | |
Senior Member
Join Date: May 2010
Location: Southern California
Posts: 7,046
|
Re: Dual updraft carburetors
Quote:
Charlie Stephens |
|
03-05-2011, 08:20 AM | #8 |
Senior Member
Join Date: May 2010
Posts: 335
|
Re: Dual updraft carburetors
I'm running two model A zenith carbs side by side. With this set up you can idle one one carb and use the choke rod. It is easy on this installation to design a progressive linkage so that you run on one carb until about 1/2 throttle.
|
03-06-2011, 12:36 AM | #9 |
Senior Member
Join Date: Oct 2010
Posts: 837
|
Re: Dual updraft carburetors
|
03-06-2011, 04:57 PM | #10 |
Senior Member
Join Date: May 2010
Location: Columbus, IN
Posts: 158
|
Re: Dual updraft carburetors
|
03-06-2011, 07:49 PM | #11 |
Member
Join Date: May 2010
Location: Downeast Maine
Posts: 78
|
Re: Dual updraft carburetors
Ron, who makes that intake??
|
03-07-2011, 09:04 AM | #12 |
Senior Member
Join Date: May 2010
Location: Columbus, IN
Posts: 158
|
Re: Dual updraft carburetors
I don't know who made the intake. I bought it at Hershey about 10 years ago.
|
03-07-2011, 09:53 AM | #13 |
Senior Member
Join Date: May 2010
Location: La Mesa Ca
Posts: 1,169
|
Re: Dual updraft carburetors
The side by side updraft intake is a stock A intake with a 90 degree ebow braised on with a flange for the outer carb. The article on how to make one is in Vol.! #4 issue (April '92) of SECRETS OF SPEED by Charlie Yapp. I made the one on my pickup about 15 years ago and it is fantastic.
|
03-07-2011, 11:59 AM | #14 | |
Senior Member
Join Date: May 2010
Location: Jordan, MN
Posts: 1,411
|
Side by side dual updraft carburetors
Quote:
Looks like I'll be putting my other intake from Charlie Yapp on the shelf. Thanks All! Dave in MN |
|
03-07-2011, 02:50 PM | #15 | |
Senior Member
Join Date: May 2010
Location: South California
Posts: 6,188
|
Re: Dual updraft carburetors
Quote:
Who makes that 'two in one' gas line setup. Do you send them measurements/drawing of what you want/need what? |
|
03-09-2011, 04:30 PM | #16 |
Junior Member
Join Date: May 2010
Posts: 5
|
Re: Dual updraft carburetors
Heres Mine
|
03-09-2011, 04:36 PM | #17 |
Senior Member
Join Date: May 2010
Location: ⓉⒺXⒶⓈ
Posts: 2,047
|
Re: Dual updraft carburetors
THAT is prettty smoooooth!
__________________
-------------- Drive it like you know how to fix it! DMAFC / OILERS CC-MC |
03-09-2011, 07:17 PM | #18 |
Senior Member
Join Date: May 2010
Location: Rhode Island
Posts: 649
|
Re: Dual updraft carburetors
Shock, are those dual Zeniths? Any stalling problems?
|
03-09-2011, 08:21 PM | #19 |
Senior Member
Join Date: May 2010
Location: Suttons Bay, Mich.
Posts: 3,392
|
Re: Dual updraft carburetors
Hey Ron, what carbs are those? I am really liking the carb setups here, Shock, that is a great looking motor.
__________________
Respecting and Resurrecting Ford Model A's. |
03-11-2011, 12:34 PM | #20 |
Junior Member
Join Date: May 2010
Posts: 5
|
Re: Dual updraft carburetors
Yes they are regular model A Zeniths......no stalling at all.
Note the plates that I made to index the rear of the carbs out aprox 22 degrees so the floats no longer pivot in the direction of the vehicles travel. |
|
|
Sponsored Links (Register now to hide all advertisements) |
|