1957 283/270hp dual quads drag testing on a 350

Ed Wright · 09-03-2009, 09:33 AM

I ran the same setup on a 265" in the '60s and early '70s. Some guys made a wire hook to hold them wide open. I tried that, but good ol' Red Anderson made me take mine off. The car ran the same both ways. If you think that is the problem, tie the weights up to see if it actually is. I saw guys drill holes in the thick (heavy) weights to lighten them, they came with two different weights. Mine all had the thin weights. I would be suprised if that is your problem.

Good luck, Ed

wheezer · 09-03-2009, 10:36 AM

I'll try the wire open suggestion. The real trick is getting the rear booster venturies flowing fuel without leaning out and stumbling more than before with the weights swinging loosly based on the air flow signal. The throttle linkage is set to open both carbs together. What are the other possible explainations for this mid range stumbling? Thanks for the help.

Bob Pagano · 09-03-2009, 11:48 AM

To much fuel presure

Ed Carpenter · 09-03-2009, 08:27 PM

Mike Braswell runs this setup on his 57' Chevy Super Stocker. He reads this forum he may chim in.

55 Chevy · 09-03-2009, 11:42 PM

Do you run wedge plates between the carbs & the spacer/manifold? Because of the small bowls in the WCFB they may run out of gas for a split second then perk up when it gets fuel again. The angle plate helps with this.

09-03-2009, 09:33 AM	#1
Ed Wright Veteran Member Join Date: Mar 2005 Location: Sand Springs, OK Posts: 8,132 Likes: 896 Liked 390 Times in 170 Posts	Re: 1957 283/270hp dual quads drag testing on a 350 I ran the same setup on a 265" in the '60s and early '70s. Some guys made a wire hook to hold them wide open. I tried that, but good ol' Red Anderson made me take mine off. The car ran the same both ways. If you think that is the problem, tie the weights up to see if it actually is. I saw guys drill holes in the thick (heavy) weights to lighten them, they came with two different weights. Mine all had the thin weights. I would be suprised if that is your problem. Good luck, Ed __________________ Ed Wright 4156 SS/JA

09-03-2009, 10:36 AM	#2
wheezer Junior Member Join Date: Sep 2009 Location: Dallas/FtWorth Posts: 13 Likes: 0 Liked 0 Times in 0 Posts	Re: 1957 283/270hp dual quads drag testing on a 350 I'll try the wire open suggestion. The real trick is getting the rear booster venturies flowing fuel without leaning out and stumbling more than before with the weights swinging loosly based on the air flow signal. The throttle linkage is set to open both carbs together. What are the other possible explainations for this mid range stumbling? Thanks for the help.

09-03-2009, 11:48 AM	#3
Bob Pagano VIP Member Join Date: Jun 2002 Location: New Holland, PA Mooresville,NC Posts: 1,163 Likes: 249 Liked 16 Times in 11 Posts	Re: 1957 283/270hp dual quads drag testing on a 350 To much fuel presure __________________ Bob Pagano A/SA

09-03-2009, 08:27 PM	#4
Ed Carpenter Live Reporter Join Date: May 2006 Location: Dripping Springs, Tx Posts: 2,710 Likes: 187 Liked 520 Times in 132 Posts	Re: 1957 283/270hp dual quads drag testing on a 350 Mike Braswell runs this setup on his 57' Chevy Super Stocker. He reads this forum he may chim in. __________________ Ed Carpenter 2005 Chevy Cobalt A/SM Race Engine Development

09-03-2009, 11:42 PM	#5
55 Chevy Member Join Date: Feb 2008 Location: Calgary,Alberta area Posts: 229 Likes: 23 Liked 20 Times in 15 Posts	Re: 1957 283/270hp dual quads drag testing on a 350 Do you run wedge plates between the carbs & the spacer/manifold? Because of the small bowls in the WCFB they may run out of gas for a split second then perk up when it gets fuel again. The angle plate helps with this.