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? |
DBCooper |
Oct 30 2013, 12:42 PM
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#2
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14's in the 13's with ATTITUDE Group: Members Posts: 3,079 Joined: 25-August 04 From: Dazed and Confused Member No.: 2,618 Region Association: Northern California |
You say "hesitation on the initial throttle is huge." What does that mean, exactly? Is it always from a "dead stop"? Meaning it falls on its face on the first touch of of the throttle? When you stab the throttle only from low RPM's, or only at high RPM's, or both? Or on a smooth application of the throttle it stumbles at some point as the RPM increases? All of those, or any of them more or less?
Are you using the Weber tech manual? It has (if I remember correctly) some values for the volume of gas from each full squirt of the accelerator pumps. Did you measure that? If not you can get a reasonable idea by watching the stream in each throat as you pump the carbs, but I guess you probably need to know what looks "right" first. to compare. Oh, and another thing that can cause a low-RPM stumble is low float level and not enough fuel in the bowl. |
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