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



 VIEW    REPLY TO THIS MESSAGE    PRINT   SAVE 

Talk of 2' SUs 140-160

posted by  someone claiming to be anthony on  Sat Feb 28 22:18 CST 2004 [RELATED]

Hello.
I've had this on my B20 with HS6's... I put it on a dyno, and saw this happening. What I did was cut the big cast-tron tube which connects the 2 carbs, welded it closed. And joined the two carb with a small hose instead (1/4"), just to balance the vacuum at idle. With the 2 carbs running independently (not joined at all) the engine wouldn't idle too well, and the carbs' pistons would go up and down all the time (like vibrate more like.)

My guess is that the carbs aren't perfect, and it's easier to raise one carb than the other... so one decides to flow more than the other and route the mixture through the big-cast balance tube instead.
Hope this helps.





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.