Setting float level on Weber IDA carbs.

[Bruce]

[jason]

Buy the Gene Berg tool, $30. Its GB552. Easy to use.

[croSSeduP]

[Art Thraen]

[croSSeduP]

Setting the float level on a 44 IDF is a cinch compared to this. I hope I can come to comprehend this because I just picked up a set of IDA's to put on my motor.
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[gerg]

After looking through the Berg instructions and the HotVWs article, I finally found my Weber Tuning Manual. It says that "Check the float maximum lowering position: The needle must travel a distance equivalent to slightly more than the diameter value (in mm) stamped on its seat."
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Gerg

. . . I got 99 problems and my bus ain't one . . .

'65 Sunroof Beetle
'65 Vert
'60 Singlecab

[gerg]

Thinking through my reply there, if I don't give it some down movement the needle will never open . . . So, is there a 'too far down' setting? Or should I just make sure it goes far enough for the full needle travel?
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Gerg

. . . I got 99 problems and my bus ain't one . . .

'65 Sunroof Beetle
'65 Vert
'60 Singlecab

[Ellis' Bug]

What about that tool that attaches to the outside of the IDA, fuel flows into it and rises to one of two lines. I just got one from Jay Cee I think for about $40. Haven't tried to use it yet but you unscrew a plug on the outside of the carb float bowl and attach this tool to see how high the fuel gets in the float bowl.

Has anyone use this tool. I seem to remember it is a Porsche tool.
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[gerg]

I'm finally checking my new 48s, an old redline kit I bought years ago (unused). The floats are very high out of the box (kinda expected that). When I invert the carb body and use the tool to see how far the float goes up (to the 5.5 spec) I also find that the float will go NO LOWER than that point. I cannot find any spec on the float drop for the 48 IDA. A few references to checking the rise and drop, but no spec of the actual drop.

In other words, when I adjust the tang on the float so that it only rises 5.5 above the body, it will essentially become stationary - there is no drop from that point. I see the other tang for adjusting float drop, but no idea how far to take it?
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Gerg

. . . I got 99 problems and my bus ain't one . . .

'65 Sunroof Beetle
'65 Vert
'60 Singlecab

[Bruce]

With the tools in the pics above, I also made the float spring. Never use it though. I just hang the carb upside-down and measure the 5.5-6mm float height.
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[fusca66]

And the Float spring ( 98013.800 ) says to put in side...have difference if not put? If I dont have :roll:
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Bug 1951 1900cc
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Na duvida não ultrapasse

[Dano382]

Heres a good link. I use a micrometer and from the tab that hits the ball should be .200" This is how Jaycee showed me. Its hard to explain but you might figure it out. You can use a micrometer to measure the other way as well.

http://webers.ru/docs/weber/WeberFloatlevelinginstructions.pdf
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[Bruce]

[gerg]

Wow - I have done IDFs a few times, but I need to do the IDAs on the'vert here very soon.

I don't have any of those tools - and didn't think beforehand about hte float not being on the carb top but in the body.

Always something . . . .
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Gerg

. . . I got 99 problems and my bus ain't one . . .

'65 Sunroof Beetle
'65 Vert
'60 Singlecab

[Mohawk]

Should i measure with or without gasket?
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[tufty65]

Yes thats it
Very good to see the specs clearly.
excellent now i can go and set mine.
Thanks for posting that up.
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Click to view image

[VWXTC4FREE]

Thanks,Bruce .That is exactly what I needed.Those tools are nice and the pics and instuctions were AWESOME! The float depth tool that they dont show in the manuel is what was stumping me.

[Bruce]

Here are the tools I made:

The tool on the left is used to set the distance from the carb top to the tip of the inlet valve like this:

The distance is set by changing the thickness of the gasket between the valve and the carb top. Spec is 25.0mm.

The tool at the far right of the top pic is used to set the distance from the float's tab to the carb top. Although my tool looks adjustable, it is only adjustable to get the setting according to Weber's spec, 24.2mm. Here it is installed:

Then when the carb is turned upside down, the float "rises" to touch the tool like this:

Finally, the last tool is used to measure how much above the carb top the float rises to:

Note the slot machined in it. This is to clear the seam of the float. The tool has this machining on both sides, one is machined so the step is 5.5mm, the other is 6.0mm. The spec is to have the 5.5 touch the float, and have a gap for the 6.0 side.
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[tufty65]

[tufty65]