GaryM
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| posted on 8/7/08 at 12:27 PM |
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Jet size numbers - what do they mean?
Does anyone know what the number stamped on a carb jet actually signifies?
I've read that it could be the flow rate in cc/min or alternately opening diameter in 1/100ths of a mm?
Cheers
Gary
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Guinness
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| posted on 8/7/08 at 12:38 PM |
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Yup, my jets were drilled out to 205, using a 2.05mm drill bit.
HTH
Mike
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Mr Whippy
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| posted on 8/7/08 at 12:41 PM |
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I think most jets are in fractions of a inch for the bore
Fame is when your old car is plastered all over the internet
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82 Locost
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| posted on 8/7/08 at 12:43 PM |
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What Guinness said. My 145s are 1.45mm diameter.
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David Jenkins
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| posted on 8/7/08 at 01:07 PM |
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Yes - in most cases, hole size in mm x 100
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rusty nuts
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| posted on 8/7/08 at 06:02 PM |
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Not always the case with Weber carbs though
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David Jenkins
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| posted on 8/7/08 at 06:52 PM |
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True - I assumed that we're talking about bike carbs - but I seem to recall that Weber DGV jets were similarly marked.
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Stu16v
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| posted on 8/7/08 at 08:51 PM |
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The jet markings on Weber carbs have no meaning or logic... 
Dont just build it.....make it!
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