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TwoSeven
11th July 2005, 19:04
Does anyone have some links to formula for calculating fuel flow rates from main/pilot/needle jet sizes etc.

pref. for both mikuni and keihin jets (saves me having to convert).

Cheers
Hitcher
11th July 2005, 20:55
Try this for starters:

http://www.answers.com/topic/carburetor
TwoSeven
11th July 2005, 22:35
Thats pulled from the wikipedia.

I actually need to be able to calcualte the fuel flow given the size of the needle and needle jet used (and main jet).
Hitcher
11th July 2005, 22:47
Thats pulled from the wikipedia.

I actually need to be able to calcualte the fuel flow given the size of the needle and needle jet used (and main jet).
Sorry. I thought there was a link from that page to a fluid flow formula.

My (rusty) knowledge of fluid dynamics suggests that that may be a rather complex calculation, unless there's a convenient ready reckoner for this exercise.

Fluid flow through a nozzle is complex and (from memory) is quite different when there's a vacuum involved and for liquids of differing viscosities.

Hopefully somebody will know a simple way of working this out.