The message to which you are about to reply is shown first. GO TO REPLY FORM



 VIEW    REPLY TO THIS MESSAGE    PRINT   SAVE 

b20b dizzy - vacuum RETARD ???? 140-160 1970

posted by  someone claiming to be Rhys on  Wed Jan 22 20:04 CST 2003 [RELATED]

First off I set the timing to factory spec - maybe a degree or two more if gas and carbon build-up will allow it, and disconnect the vacuum retard every time. Its purpose is to reduce peak combustion temperatures and lower Nox formation - sort of an early method before convertors came along. All it did was increase fuel consumption, exhaust valve temperature, and lower power output. Many times I have tuned up customer cars, told them about my little modification, and a year later the car comes in with the damn thing hooked up and the customer telling about this other mechanic who loudly proclaimed "Ya got ta have vacuum advance - evrrybuddy knows thet!" Sure. If only it was.
Originally it was hooked to manifold vacuum on D-jet and K-jet, and to the rear carb on B20B at the port below the throttle plate.






USERNAME
Use "claim to be" below if you don't want to log in.
PASSWORD
I don't have an account. Sign me up.
CLAIM TO BE
Use only if you don't want to login (post anonymously).
ENTER CAPTCHA CODE
This is required for posting anonymously.
OPTIONS notify by email
Available only to user accounts.
SUBJECT
MODEL/YEAR
MESSAGE

DICTIONARY
LABEL(S) +
IMAGE URL *
[IMAGE LIBRARY (UPLOAD/SELECT)]

* = Field is optional.

+ = Enter space delimited labels for this post. An example entry: 240 muffler


©Jarrod Stenberg 1997-2022. All material except where indicated.


All participants agree to these terms.

Brickboard.com is not affiliated with nor sponsored by AB Volvo, Volvo Car Corporation, Volvo Cars of North America, Inc. or Ford Motor Company. Brickboard.com is a Volvo owner/enthusiast site, similar to a club, and does not intend to pose as an official Volvo site. The official Volvo site can be found here.