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  #1 (permalink)  
Old 09-24-2009, 09:47 PM
Full Throttle Al's Avatar
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Join Date: Jul 2000
Location: Shreveport, LA
Cobra Make, Engine: CSX4083, NOS 427 SOHC, serial number 589. Dyno'd in 1967 at 629HP with single 4v 560 Holley. Now with 4 Webers.
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Old 09-24-2009, 09:49 PM
Full Throttle Al's Avatar
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Join Date: Jul 2000
Location: Shreveport, LA
Cobra Make, Engine: CSX4083, NOS 427 SOHC, serial number 589. Dyno'd in 1967 at 629HP with single 4v 560 Holley. Now with 4 Webers.
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Original SOHC 58mm manifold
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Old 09-24-2009, 10:32 PM
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Join Date: Nov 2003
Location: West Barnstable, MA
Cobra Make, Engine: Shelby CSX4252,aluminum body, 427 side-oiler, Webers
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Many discussions on this forum about Webers from tuning to performance to cost, etc. I have never regretted going with my 48IDA's. When you get into the tuning process, you'll actually hear your engine talk to you and tell you what makes it happy. Stumbles, backfires, carbon deposits on the plugs are the equivalent of a baby crying. It's telling you it's not happy and now the journey begins in giving it what it wants. Once you hit the setup and stuff that throttle to the mat, any doubts you had about whether or not to take the Weber plunge disappears instantly.
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Old 09-30-2009, 01:48 PM
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Join Date: Jul 2000
Location: Shreveport, LA
Cobra Make, Engine: CSX4083, NOS 427 SOHC, serial number 589. Dyno'd in 1967 at 629HP with single 4v 560 Holley. Now with 4 Webers.
Posts: 295
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Rick,
We are both correct. Per the response below from Berg, the mounting pattern for the 58 carb is the same as the 48 IDA but modification of the manifold IS required:

Mr. Sorkey, Our Berg IDA carbs have the same stud pattern as the original Weber 48 IDA. The top of the intake manifold needs to be opened up for the larger throttle plate in our carbs.

Sincerely,
GENE BERG ENTERPRISES

Tim Walker
Parts Manager
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