32-34 PDSIT use in type 3s

[Komissar]

Hello,

I have got myself a pair of used 32/34 PDSIT 2 and 3 carbs and I have a couple of questions regarding them:

1. As far as I knew, 32/34 carbs were a type4 bus thing, (type 3 carbs are 32 only ? ) however, these ones seem to be set up for type 3' ( 24mm venturis, and the tops hve the typ3-only airfilter holders) .
Were any type 3's issued with 32/34 carbs ? If so, what years and for what markets?


2. My carbs seem to have a strange feature on their base, near the throttle shafts, some sort of valve held in place by an elastic metal strip - such as in this picture: (borrowed from thesamba gallery, not actual picture of my carbs)
https://www.thesamba.com/vw/gallery/pix/1104075.jpg

I have found a diagram where this valve is labeled as " valve - hot idle" (no 49)
http://www.thesamba.com/vw/archives/manuals/solex_34_pdsit_2_3/Solex_34_PDSIT_2_3_Carburetor_1.jpg

What exactly does this hot idle valve do ?
_________________
1965 Sunroof Beetle
1972 Type 3 Squareback
1978 Skoda 105S

[Slow 1200]

Yes later carbed type 3s have the 32-34s which are nothing like the ones you find in buses.

If it has the hot idle valve it comes from an automatic type 3, what's the engraved VW number in them? that will tell the story (or most of it )

I don't know the change-over year from 32 to 32-34 but it must have been 70 or 71 at the latest; they were used in markets which had the option of carbed or injected cars, which is pretty much everywhere except for the US

[Komissar]

The engraved numbers (on the outside bottom of the float chamber) are

VW317-1
and
VW316-1

It is good to know that these are for a type 3 application however, I am still confused about the hot idle valve - from what I see, it opens a small passage below the throttle plate thus creating a vacuum leak ... am I missing something ?
_________________
1965 Sunroof Beetle
1972 Type 3 Squareback
1978 Skoda 105S

[Slow 1200]

Those are from 71 automatic, you got a PM