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Old 11-25-2007, 11:53 PM
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Join Date: Oct 2001
Location: Linkenheim, BW
Cobra Make, Engine: Sorry "just" a 68 Shelby GT500
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Quote:
Originally Posted by priobe
dlampe / 68gt500,

I have tried many different config to the carbs and yeild the same results

Here is config # 1

42 choke
120 idle holder
65 mains
210 air corrector
f-11 / F-16 / F-7 Etube
180 main
oo bleed

When you look at the LM1 everything looks great but all of a sudden you spikes that go to 22 on the LM (in and out / up and down like a mis fire

Next setup

60 holder
60 jet
f-7 / f-11 /f-16
210 air corrector
180 main
42 choke

Same result

I know most people with the webers run:

37 choke
60 idle
120 holder
F-7 e tube
210 corrector
160 main
50 bleed
.....
When I gradually easy into the throttle it is fine but drive normal and it happens.

Your problem sounds almost exactly like the one I was having.

A huge flat spot on transition.

The one change, that did the trick for me was to drill the 3rd transition hole.

Here is my setup:
idle 65
idle holder 110
Emulsion tube F7
3rd transition hole drilled
Main 140
Main air correction 120
Venturis 40 mm

As you can see my setup is way leaner than yours - still no flat spots.
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Mike
68 GT 500
(Germany)
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