Dellorto SHA Jet Measurement?

Question:

what does the size number actually refer to on a Dellorto SHA jet?

100ths mm? 1000ths inch?, gauge?

Re: Dellorto SHA Jet Measurement?

Interesting question.

The only thing for sure is that the bigger the number, the bigger the hole in the jet.

Re: Dellorto SHA Jet Measurement?

mms

Re: Dellorto SHA Jet Measurement?

a 100 jet has a 1mm dia hole in it

Re: Dellorto SHA Jet Measurement?

ive always wondered that. well then what about bing? Is it the same system? ive heard it is not.

Re: Dellorto SHA Jet Measurement?

"a 100 jet has a 1mm dia hole in it"

That would make sense as Dellorto are metric. It could make drilling out jets with metric bits close to shop-bought jets.

Re: Dellorto SHA Jet Measurement?

The various carb manufacturers can set up any system they want.

Some old Amal carbs had the jets measured in oz of gas in x numbers of minutes with a standing head. Say for instance if you had a standing head of fluid at 1 ft above the jet and then when you let the fluid through and you got 35 oz in 5 minutes then they could call it a size 35.

I like the actual measurement system better.

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