Carb Setting Nightmare, Always better to do it yourself?? |
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Carb Setting Nightmare, Always better to do it yourself?? |
vesnyder |
Sep 27 2008, 06:29 PM
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#1
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Senior Member Group: Members Posts: 680 Joined: 14-April 05 From: Cleveland, OH Member No.: 3,933 |
I have been having issues with adjusting the carbs on my rebuilt 1911 so I thought I would see what a professional could do. This local mechanic specializes in Porsche's and has recently gotten a dyno so I thought I would have him adjust my Webers. The car was running fine but was rich at higher RPM's as confirmed by his dyno and sensors he was using to adjust. I had 28 mm venturis and 115 mains. It ran good but the rich situation gave me concerns particularly on a rebuilt motor. I went to pick it up after he had the car for several days and he said he was having issues. The car was running like crap, backfiring and missing. He said the carbs were adjusted good but it was either the distributor or the valves??? He had put in 195 mains and 34 mm venturis? Upon further inspection he had a 185 in one of the carbs? WTF? On top of that he charged me $320? I am done with so-called experts. This takes the cake!
BTW I am working with Jogn at AirCooled to fix! |
Borderline |
Sep 29 2008, 10:50 AM
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#2
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Senior Member Group: Members Posts: 720 Joined: 8-February 05 From: San Juan Bautista, CA Member No.: 3,577 Region Association: Northern California |
When I bought my 40's they came with a similar setup but not as purdy. I've found that when synching the carbs it helps to do it twice. The first time is the normal idle adjust and the linkage disconnected. The second time I put a little tension on the throttle cable to bring the engine up off idle so that it is controlled by the throttle linkage (~2k rpm). I then balance the flow a second time by adjusting the linkage lengths. This works well for my setup. Of course, I recall reading somewhere that this type of center pull system doesn't work because of the heat expansion of the engine. So make sure when you do your adjustments that the engine is good and warm!! (IMG:style_emoticons/default/biggrin.gif)
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