Weber Emulsion tubes

[karl_2ltGC]

Whats the story, ive searched forums and found nothing. So far what i know is there tubes made of brass with different holes in em and differnt sizes/shap of tube....

But whats the effect and why?
Like how is a thing tube differnt to a thick one?
And how is having holes ip the top of the tube diffrent to having ones down the bottom?
How does the number of holes affect stuff, or the size of the holes?
What the hell are the numbers meant to mean....like F66 or F93?

Cheers Karl

[Billzilla]

*Banging the rust from the memory box*

The emulsion tubes mix the fuel from the main jets down the bottom of the tube with the air correction jets at the top of the tube.
The float level in the carby sets not only the level of the fuel for constant feed but also how far the fuel level sits around the emulsion tubes. As the engine power picks up (a combination of revs & throttle to give airspeed & hence vacuum through the carby) the fuel level drops.
This is where the holes in the side of the emulsion tubes come in - They alter the mixture as the fuel level outside them goes up & down, and also how much extra air is let in over the air corretion jets at the top.
I can't remember how the positioning of the holes affects the mixture, but I'm sure someone will come up with an answer.
The 'F' numbers mean nothing, they don't follow any sensible order as to what they do. But an F16 emulsion tube is pretty common and usually safe to start fiddling with.

[RealizE]

As the fuel level inside the e-tube lowers, the result is that more air holes are uncovered, and thus more air is released into the fuel. Changing the pattern of the holes means you can alter the mixtures strength according to throttle opening. So, as the level changes (with throttle opening), having more/or less holes at particular points in the tube will determine how much air is being emulsified with the fuel.

[karl_2ltGC]

After a bit of searchin I found a great site that explains it well :D

http://jimsvw.xenetech.com/Tech_How_To_s/Emulsion_Tubes_again___/emulsion_tubes_again___.html

[RealizE]

If you want to know the what the different tubes are good for, i can copy out a page from my weber book when i get home.

It has a list of all the tubes and how the differ in operation - eg F* brings in more fuel at this time to provide this characteristic...

[karl_2ltGC]

Realize that would be sweet, not unlike candy :D
Please scan away... feel free to scan more stuff :D
I'm rather enjoying rejetting the weber and im keen to learn everthing i can

[HoonBoy]

There is plenty of good weber info on dave andrews website, although it is for DCOE the principles shoudl be the same

Dave Andrews Site (http://hometown.aol.com/dvandrews)
Dave Andrews Weber Page (http://hometown.aol.com/dvandrews/webers.htm)

[RealizE]

Here ya go nigga!