I hate my Carbs Much Less, Chris Foley is a God! |
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I hate my Carbs Much Less, Chris Foley is a God! |
Mblizzard |
Oct 30 2013, 12:13 PM
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#1
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Advanced Member Group: Members Posts: 3,033 Joined: 28-January 13 From: Knoxville Tn Member No.: 15,438 Region Association: South East States |
Well after much playing and changing I have to say I hate my carbs. I have done every jet size and I can't really get it to run well on anything but 70 idle jets and that is way to rich. With 60s it runs not quite as rich but the hesitation on the initial throttle is huge.
Have played with the adjustments and I think I have it running well but it never performs well. 2056 just built, 44 IDFs, 60 idle jets, 28 vents, 135 mains, F-11 emulsion tubs, 175 air correction jets. Timing at 27 to 30. SVDA Dizzy with electronic ignition. Valves recent set and rechecked. Synced at idle and 1500 rpm. Runs well at higher rev and pulls strong but I can't get rid of that hesitation. I know there will always be some but at times from a dead stop it almost stalls. What am I missing? (IMG:style_emoticons/default/headbang.gif) (IMG:style_emoticons/default/headbang.gif) Gone through all of the Weber tech trouble shooting steps and I can't find anything that says I have something wrong. Is there an adjustment on the accelerator pump? Or do I need to up the accelerator jet? I will be going back to FI at some point but these carbs should work better than they do. Taking it to Eurohaus tomorrow maybe they will have better luck. Suggestions? |
r_towle |
Oct 30 2013, 05:14 PM
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#2
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Custom Member Group: Members Posts: 24,591 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States |
Stock FI camshaft, jets to large, and throttle plates too large with a very slow port speed are clear factual evidence that the opinions you have listened to May not always be right.
40mm is good up to about 2.4 liter, but then you need custom vents to keep up. How do you know it's running lean? Do you have an Air fuel gauge? Running 50 idles is pretty typical on a 40 mm carb. With the larger amount of air moving by the jet, you cannot help but suck in more fuel than a properly tuned 40mm carb, though at a lower speed. It may be reality that in order to try and compensate for the larger throttle plates, and lower port speed, you may need more fuel to make up for it, but I have a really hard time believing that.... But what do I know. |
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