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



 VIEW    REPLY TO THIS MESSAGE    PRINT   SAVE 

Stroker Cranks. 140-160

posted by  JohnMc on  Mon Jun 27 09:05 CST 2005
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Thu Oct 23 07:42 CST 2014
[RELATED]

The counterweights have nothing to do with the pistons and rods. A crank is balanced without them on - the counterweights counterbalance the rod throws, and nothing else. The pistons all counterbalance each other - they all need to be the same weight. They all go up and down in pairs, for every movement up or down or sideways (rod big ends) there is a corrsponding part going the opposite way somewhere else. A really good balancing job would alwo weigh each end of the rod, to make sure the mass of the big end that goes sideways back and forth is sonsistent as well.

Of course, all those forces aren't quite lined up (the two pistons going up are not in the same location fore/aft as the pistons going down) so a 4 cylinder will always be a little buzzy, regardless of how well are the parts are balanced.
--
I'm JohnMc, and I approved this message.






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.