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Weird Long Stem Venturi / Nozzle


AZGhost623

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Off road racers used those. You can find them on buggies running 44IDF's I forget...something about the amplification signal provided by the booster and when it takes effect.

 

"Shift, Ctrl, Arrow Up, up, up..."

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I've seen the Porsche venturis with the longer stem, and found history on those pretty quickly but never seen a setup on DCOE's before. Asked around a bit, and this was something that was completely custom made, not an off the shelf oem part. Looking at the nozzle, it looks like its pinched in a bit and flarred out at the end like a rocket nozzle... wonder if it had the same effect :) Cool vintage stuff either way....

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From the expert in our shop...

 

When Venturi size is close to the bore size in the carb you lose signal/sensitivity across the mains. These extended nozzles increase the signal/sensitivity and make the carb more tunable.

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