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> WTB: Bosch dual vacuum advance/retard, 1974 2.0l
Medtner3
post Jul 1 2021, 07:33 PM
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I am looking for this part. Bought a used one it worked for a little while then failed. Need a working one
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914werke
post Jul 1 2021, 08:59 PM
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there is a part # on the arm
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914Sixer
post Jul 2 2021, 06:15 AM
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Should have 979 on arm.
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JeffBowlsby
post Jul 2 2021, 09:40 AM
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Vacuum pots are one of the holy grail of the original distributors parts.

Do not know of a source for new.

Found this just now, I wonder if it could be adapted to work and what performance difference there would be?

https://vwparts.aircooled.net/Vacuum-Advanc...-p/07-059-r.htm
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914Sixer
post Jul 2 2021, 10:16 AM
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Jeff,
Think that pot is single port.
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JeffBowlsby
post Jul 2 2021, 10:57 AM
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QUOTE(914Sixer @ Jul 2 2021, 09:16 AM) *

Jeff,
Think that pot is single port.


The 74 only uses one port...the retard port. But I wonder if a port could be retrofitted as long as the internal diaphragm is good.
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Medtner3
post Jul 2 2021, 07:29 PM
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QUOTE(JeffBowlsby @ Jul 2 2021, 11:57 AM) *

QUOTE(914Sixer @ Jul 2 2021, 09:16 AM) *

Jeff,
Think that pot is single port.


The 74 only uses one port...the retard port. But I wonder if a port could be retrofitted as long as the internal diaphragm is good.


My throttle body must have come off of a 73 because I have ports for both advance and retard my car is a 74 though I just put back to FI not long ago
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