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Does anyone know if there is a size difference between the 1.6 and 1.9 Weber's or are they both 32/36?
I have a video comparing them with the details in the description:

All the carbs are 32/32 or 32/34, in general:
The 32/32 are base 1.6 (VIN 2)
The 32/34 are 1.6 HO or 1.9 (VIN 4)
The 32/32 are also some times 1.9, I believe this is for the "fuel saver" models?

The telltale between the 1.6 & 1.9 carbs is that the 1.6 carbs always have 2 choke butterflies while the 1.9s always only have 1.
 

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Interesting to see the three carbs.
The jets referred to in the video are the air bleeds, which regulate the amount of air entering the emulsion tubes to mix with the fuel coming up via the main jets in the fuel bowl. The HO carb has smaller air bleeds so that the mixture entering the booster (inner) venturis is richer, to compensate for the bigger main venturis.

Hmmm, is the plural venturis, or venturii?
 

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Why no fuel injection?
I can better tune them, find them more reliable, and they start even faster - assuming you have good compression
 
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