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Weber 40 DFAV people: jetting advice needed... (yes I search

Guest Anonymous

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Guest Anonymous


Hi folks!

The kittens were looking at me with confused eyes. I have a

freshly rebuilt Weber 40/40 DFAV downdraft on my '72. When I bought

the carb I was planning big things for the engine, but I've changed

directions and now need to jet the thing for my slightly-tired stock

motor. I'm sure it's too rich as is. I know, I know, it's a big carb for a


Current jets: 180 main, 185 air, 60 idle

Motor is stock with an E12 head. Shows around 160/160/160/145

compression. I drive almost every day in 50-80 degree temps and do

not live at elevation. What jets should I go with to get a good burn?

How hard is it for a rookie like me to change the jets?

Thanks as always, guys!


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Guest Anonymous


URL: http://www.dansperformanceparts.com/buggy/intake/buggyintake3.htm

You are lucky, as you need to swap only two jets or two air correctors. Cheaper.

If I were you I would buy a whole set of main jets to start. The 2000cc Ford Capri with 32/36 DFAV and 26mm main venturiis runs 4.5 aux venturiis, 1.35 main jets, and 170 air correction jets with f6 emulsion tubes.

If I were you, I would start with 145 and 160 main jets (test both sets) and see what happens with the upper rev's mixture. Remember that for each 5 points your jets go bigger, it's equivalent to 15 points smaller air correct jets. But air correcton jets mostly apply to upper mid and high revs.

Jets are around $5 each.

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Guest Anonymous

There's no better way to find out what's best than to try and see. I didn't know they were that cheap. Thanks!


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