Intake manifold question

[TheDon]

I have two intake manifolds for my singleport 1500CC engine (H engine code so it’s cleaely not OG to my ‘64)

This manifold was on the engine. Big hose with a bolt on the end on the nipple to the right. This manifold has holes in the heat risers from rust

A member from the forum gave me this manifold to use. I need to clean out the heat risers. No holes from rust.


My main question is, what are the pipe nipples for? Big and small

I’m wondering if I do not need the smaller nipple if I can cut it off and weld it shut.
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[TDCTDI]

They were used for a vacuum source for brake booster (bus), emissions (idle solenoid) and/or autostick clutch diaphragm.
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Everybody born before 1975 has a story, good, bad, or indifferent, about a VW.


GOFUNDYOURSELF, quit asking everyone to do it for you!


An air cooled VW will make you a hoarder.


Do something, anything, to your project every day, and you will eventually complete it.

[mukluk]

Big pipe = vacuum takeoff for an Autostick or the brake booster on a Bus.

Small pipe = vacuum takeoff for altitude compensator or throttle positioner.
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1960 Ragtop w/Semaphores "Inga"

[TheDon]

Excellent. Thank you

I’m going to use the intake with the small pipe nipple and if I don’t need it I’ll block off the nipple with a piece of rubber hose
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