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Author Topic:   KP
posted August 20, 2004 12:52 PM
We have to run a 32/36 weber on our 2300. I'm trying to get better performance from the carb if I can. Under the air corrector jets there are emulsion tubes? How do they work? Some kind of high speed air bleed?

posted August 21, 2004 05:51 AM
Sorta...emulsion tubes are where the actual mixing of the air and fuel take place. The holes behave something like a flute does with music. Bigger holes down lower do one thing to the fuel curve, and larger holes up higher counteract the effect of the lower holes.
It's very much a balancing act there and is VERY delicate in the sizes that are needed for each specific carb no matter what brand, size, etc.
Generally, the Webers do a good job there for most 4cyl applications, it's the idle feed restrictions, jetting and power valve circuits that make more a difference than the emulsion bleeds.
But I'll admit, honestly, that Webers are by far the smallest percentage of carbs we've done.
If I've mispoken or stated something incorrectly, I'd hope experts like Earl Parker or others would help correct me.

Hope that helps, tho.

posted August 21, 2004 08:10 AM
Thanks...Everyone I've talked to say that tuning the tubes make little to no difference in horsepower and especially lap times. I've also been told the idle jets(restrictions) are responsible for 75% of the acceleration on these carbs. How is that possible? Thanks again!

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