Go Back   The Ford Barn > General Discussion > Early V8 (1932-53)

Sponsored Links (Register now to hide all advertisements)

Reply
 
Thread Tools Display Modes
Old 11-02-2014, 07:09 AM   #1
BILL WZOREK
Senior Member
 
BILL WZOREK's Avatar
 
Join Date: May 2010
Location: Florence Ma.
Posts: 2,404
Default Still a New "B" here~~~

Lately there has been talk on here about Balancing Crank /Rods / Flywheel / Pistons
Basically the spinning mass ~
Could some one please explain using small words ( Like in school I am still sitting at the back of the class room ) How each part of this is done.
BILL WZOREK is offline   Reply With Quote
Old 11-02-2014, 08:39 AM   #2
A bones
Senior Member
 
A bones's Avatar
 
Join Date: May 2010
Location: CLAYTON DE
Posts: 1,017
Default Re: Still a New "B" here~~~

Morning Bill, try cllicking on this site lots info including Reds + Car Craft. https://www.google.com/#q=how+to+balance+a+v8+engine
__________________
Enjoy yer day. Tom
Hate can't fix what it started.
A bones is offline   Reply With Quote
Sponsored Links (Register now to hide all advertisements)
Old 11-02-2014, 08:53 AM   #3
JSeery
Senior Member
 
JSeery's Avatar
 
Join Date: Nov 2012
Location: Wichita KS
Posts: 15,099
Default Re: Still a New "B" here~~~

In little words (and over simplified) you weight all the parts (pistons, rings, rods, piston pins, etc.) individually and get them to match each other. So, you would weigh all the pistons, find the lightest one and then get all the other pistons to match that weight. And so on with all the individual parts. Then you add up the weight for one cylinder (again, piston, pin, rings, rods, etc.) and use a math formula to come up with what is called a bob-weight. This weight is placed on each crank throw to the represent the weight of the parts that would be there in the engine. The crank is placed in a balancing machine and spun at different rpm. The machine tells you where the crank is out of balance and weight is added or removed to get it into balance. Then you can add things like a flywheel and balance it as part of the assembly, and so on. The only part that is different are the rods, they have to not only match weight as a whole, but for each end. So, all the small ends have to match and all the large ends have to match. That is a simplified version of it.

If you are interested in detail you might want to read some of the links A bones posted.
JSeery is offline   Reply With Quote
Old 11-02-2014, 09:13 AM   #4
Mart
Senior Member
 
Mart's Avatar
 
Join Date: May 2010
Location: Solihull, England.
Posts: 6,724
Default Re: Still a New "B" here~~~

There was a very good description of the balancing process on the Old Henry rebuild thread.

Mart.
Mart is offline   Reply With Quote
Old 11-02-2014, 11:08 AM   #5
BILL WZOREK
Senior Member
 
BILL WZOREK's Avatar
 
Join Date: May 2010
Location: Florence Ma.
Posts: 2,404
Default Re: Still a New "B" here~~~

Quote:
Originally Posted by JSeery View Post
In little words (and over simplified) you weight all the parts (pistons, rings, rods, piston pins, etc.) individually and get them to match each other. So, you would weigh all the pistons, find the lightest one and then get all the other pistons to match that weight. And so on with all the individual parts. Then you add up the weight for one cylinder (again, piston, pin, rings, rods, etc.) and use a math formula to come up with what is called a bob-weight. This weight is placed on each crank throw to the represent the weight of the parts that would be there in the engine. The crank is placed in a balancing machine and spun at different rpm. The machine tells you where the crank is out of balance and weight is added or removed to get it into balance. Then you can add things like a flywheel and balance it as part of the assembly, and so on. The only part that is different are the rods, they have to not only match weight as a whole, but for each end. So, all the small ends have to match and all the large ends have to match. That is a simplified version of it.

If you are interested in detail you might want to read some of the links A bones posted.
So the crank Balancing machine is more then just a lathe / Does any one have a picture of one??
BILL WZOREK is offline   Reply With Quote
Old 11-02-2014, 11:44 AM   #6
JSeery
Senior Member
 
JSeery's Avatar
 
Join Date: Nov 2012
Location: Wichita KS
Posts: 15,099
Default Re: Still a New "B" here~~~

Sponsored Links (Register now to hide all advertisements)
Posted some balance machines and some of the bob-weights, might give you an idea of what is going on. The balance machine has to tell you where the out of balance issue is.
Attached Images
File Type: jpg th320JDC3B.jpg (9.2 KB, 26 views)
File Type: jpg hc_eliminator-250x250.jpg (22.9 KB, 26 views)
File Type: jpg balancing.jpg (64.6 KB, 29 views)
File Type: jpg crank%20balancing.jpg (54.8 KB, 32 views)
JSeery is offline   Reply With Quote
Old 11-02-2014, 12:05 PM   #7
Kurt in NJ
Senior Member
 
Kurt in NJ's Avatar
 
Join Date: May 2010
Location: on the Littlefield
Posts: 5,246
Default Re: Still a New "B" here~~~

Here is a video of the process--
https://www.youtube.com/watch?v=ReknvNVg5m8

here is one you can make yourself--
http://antiqueautoranch.com/montana5...ter/page4.html
Kurt in NJ is offline   Reply With Quote
Old 11-02-2014, 12:19 PM   #8
JSeery
Senior Member
 
JSeery's Avatar
 
Join Date: Nov 2012
Location: Wichita KS
Posts: 15,099
Default Re: Still a New "B" here~~~

Thanks interesting. Here is a video on the whole process.
https://www.youtube.com/watch?v=M_PeWKnTchI
JSeery is offline   Reply With Quote
Old 11-02-2014, 02:16 PM   #9
51 MERC-CT
Senior Member
 
51 MERC-CT's Avatar
 
Join Date: May 2010
Location: East Hartford, Ct
Posts: 5,025
Default Re: Still a New "B" here~~~

How do Ya' balance a flathead?
__________________
DON'T RECALL DOING SOMETHING FOR MYSELF BASED ON SOMEONE ELSE'S LIKES OR DISLIKES
51 MERC-CT is offline   Reply With Quote
Old 11-03-2014, 07:03 AM   #10
BILL WZOREK
Senior Member
 
BILL WZOREK's Avatar
 
Join Date: May 2010
Location: Florence Ma.
Posts: 2,404
Default Re: Still a New "B" here~~~

Quote:
Originally Posted by 51 MERC-CT View Post
How do Ya' balance a flathead?
This has to be a American built Flathead ~~ the counter weights
are in #'s and not Kilo's LOL
BILL WZOREK is offline   Reply With Quote
Old 11-04-2014, 07:39 AM   #11
dean333
Senior Member
 
dean333's Avatar
 
Join Date: Jun 2012
Location: Shorewood Illinois
Posts: 357
Send a message via Yahoo to dean333
Default Re: Still a New "B" here~~~

Fabulous video in post #8, I never knew! Thanks!
__________________
Tim Carlig
dean333 is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Sponsored Links (Register now to hide all advertisements)


All times are GMT -5. The time now is 04:12 AM.