Mixture always too rich- weber 44 idf's |
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Mixture always too rich- weber 44 idf's |
tornik550 |
Jul 21 2014, 04:42 PM
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#1
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Senior Member Group: Members Posts: 1,248 Joined: 29-January 07 From: Ohio Member No.: 7,486 Region Association: None |
I have dual weber 44 idf's on my 2258. I was having a problem with one of my cylinders and found that the main circuit had some sort of black booger plugging most of the main circuit of cyl 2 and a small on in cyl 3. I completely cleaned everything and reassembled. The car is driving way better. I set the floats at 11.5 without the gasket.
Now I am having the other problem- my car is always too rich. At idle my a/f ratio is 13:1 which is ok for me. If I try to lean it out any more then I get popping on decel at low rpm's. On the main circuit, I am using 125 mains, f11 et, 210 ac and I am consistently around 10.2:1. I can but smaller mains but it seems like I shouldn't need that small of mains. My setup- idles-50 mains-125 et-f11 ac- 210 vents- 34 Any ideas of how to lean the main circuit? |
rhodyguy |
Jul 22 2014, 11:29 AM
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#2
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Chimp Sanctuary NW. Check it out. Group: Members Posts: 22,080 Joined: 2-March 03 From: Orion's Bell. The BELL! Member No.: 378 Region Association: Galt's Gulch |
good insight jake. thanks!
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r_towle |
Jul 22 2014, 01:39 PM
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#3
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Custom Member Group: Members Posts: 24,574 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States |
good insight jake. thanks! One proven way to deal with a situation like this is to match the vents and jets to the restrictive exhaust/heads/camshaft. It's not magic. Smaller vents and smaller fuel jets will make the setup function biased upon what the driver wants to do, driving style etc. Having an air fuel gauge in situations like this is really helpful, but it can be done the old fashioned way by reading plugs and adjusting as you go. To start with, I would reduce the size of the vents and tune from there. It will be easier to tune down, and cheaper then headers, and exhaust. Just my humble opinion.... Seems there are many opinions about carbs... Seems like a simple issue to me....less air and less fuel for any given engine will make it run less rich.... One point that has not been discussed, or a missed it. Is this a street car, a race car, or a bit of both? Street setup 1-3k rpms typically is quite a bit different then a car tune for 4-6k rpms at the track.. |
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