2056 mild carb settings, new tune advice needed |
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2056 mild carb settings, new tune advice needed |
RFoulds |
May 8 2023, 05:58 PM
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#1
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Green Teen 66 Group: Members Posts: 837 Joined: 10-August 09 From: La Quinta, CA Member No.: 10,656 Region Association: Southwest Region |
Now that the milder 2056 is in the car, I could use some advice on carb tune.
compression is at 8.8:1, valves are 44/38, cam is Webcam 86a. Weber IDF 40's have 37mm venturis, 135 mains airjets 200 F11 emulsion tube I am told by the builder that I should step down to 34 venturis, but, have no idea where else to start. Car will go to a good tuner soon enough, just want o have a good starting point. |
nditiz1 |
May 8 2023, 06:22 PM
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#2
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Senior Member Group: Members Posts: 1,190 Joined: 26-May 15 From: Mount Airy, Maryland Member No.: 18,763 Region Association: MidAtlantic Region |
I would start with 115 mains, 28 vents, 50 idle.
Once you get the baseline for the engine then you can move up and down with the vents and mains. Vents will move your powerband. The higher vents you go the less punch off the line you will have, BUT you will carry the power to redline, whereas with 28s you will have a lot of punch, but fall on its face ~4700 |
930cabman |
May 9 2023, 05:57 AM
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#3
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Advanced Member Group: Members Posts: 3,138 Joined: 12-November 20 From: Buffalo Member No.: 24,877 Region Association: North East States |
I would start with 115 mains, 28 vents, 50 idle. Once you get the baseline for the engine then you can move up and down with the vents and mains. Vents will move your powerband. The higher vents you go the less punch off the line you will have, BUT you will carry the power to redline, whereas with 28s you will have a lot of punch, but fall on its face ~4700 (IMG:style_emoticons/default/agree.gif) Starting small generally works better in my experience. With a 37 venturi you may not be getting the necessary signal. My recent 2056 with similar specs runs great with 28 vents. I have considered 30's but too many other fish to fry these days |
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