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? |
Eric_Shea |
Nov 1 2013, 01:06 PM
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#2
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PMB Performance Group: Admin Posts: 19,278 Joined: 3-September 03 From: Salt Lake City, UT Member No.: 1,110 Region Association: Rocky Mountains |
QUOTE Geeks (IMG:style_emoticons/default/ohmy.gif) I'm not the one driving a Volvo! (Ooooo that got you and Rich at the same time!) (IMG:style_emoticons/default/biggrin.gif)QUOTE i'll go pull the jets from the 44s. we'll see how the setup matches the spread sheet. i know for a fact they have 32mm vents in them. Keep in mind the cam can have a large effect on your venturi's. I set Mike's peak HP at 5400 RPM. What's yours? Agree with the timing and the valve adjustment. Very first things to do. Linkage too. I used two M8 fasteners upside down in the vise to set both drop links perfectly to each other. The other big trick was then hooking them up and adjusting the crossbar linkage so the drop links didn't have to move. It's all Paul Abbott stuff. Read through the instructions on his site and be prepared to follow them to a T. The linkage park was one of the biggest changes I noticed. No more erratic idle issues etc. (gee.. why did it idle at 950 at the last stop light and 1200 at this one?) |
DBCooper |
Nov 1 2013, 01:13 PM
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#3
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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 |
QUOTE Geeks (IMG:style_emoticons/default/ohmy.gif) I'm not the one driving a Volvo! (Ooooo that got you and Rich at the same time!) (IMG:style_emoticons/default/biggrin.gif)What? Now I'm offended. Volvos aren't geeky, but carburetor spreadsheets sure are. Keep in mind the cam can have a large effect on your venturi's. I set Mike's peak HP at 5400 RPM. What's yours? 5400? Fuel injection cam? I don't know, it's a guess, but I'd bet he's all-in at 4500, and maybe less. |
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