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. |
VaccaRabite |
May 9 2023, 08:33 AM
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#2
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En Garde! Group: Admin Posts: 13,465 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region |
Yeah. 37mm and 34mm vents are HUGE. They make sense for a race car running WOT all the time, but not for a street driven car. Vent size will change your powerband also. I had 44's on the car with (I think) 32 vents and the car made a ton of power above 4K and was a total dog until 3500 rpm. When I necked down to 40s with 28vents powerband moved to a much more usable range.
Start at 28mm. 50 idles. You may need to go up to 55 idles. I tried 60 and started coking up spark plugs. Most of your driving is on the idle jets. I had 120 mains on my 2056 and it liked those. F11 is fine for emulsion tubes. Zach |
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