Damper and Flexplate 28 or 50 oz. - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Transmission - Rearend
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 02-22-2006, 04:55 PM
Registered User
 
Join Date: Jan 2006
Location: mexico
Posts: 5
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Damper and Flexplate 28 or 50 oz.

Hi guys.
Do anybody knows the exactly description on 28 oz.and 50 oz. on counterweights on dampers and flexplate for Ford Engines.I tought it was the weight of counterweights but is wrong because is imposible that the counterweight welded on the flexplate weights 28 or 50 oz.
If anybody knows,please let me learn about it.
Thank`s.

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 02-22-2006, 10:38 PM
aka Duke of URL
 
Last wiki edit: Finding vacuum leaks Last photo:
Join Date: Oct 2001
Location: Rockville, MD
Posts: 4,821
Wiki Edits: 1

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Internal Engine:

This category primarily deals with engine balance. If you just built up a new motor, or bought a used one, and it has had a vibration from the minute you first fired it up, chances are the problem is in the balancing of the engine. Ford engines have used a variety of balance factors over the years. All small block Fords, including the 351C and 400M are externally balanced. However the early 221-302's used a 28oz. counterweight factor while recent years all use a 50oz. imbalance.
NOTE: Changed in 1981 production with introduction of 255ci.

Quote:
This means you must use the same crank, harmonic balancer and flywheel or flexplate. The Ford FE's, 429 and 460 engines are all internally balanced, except, for the 410 and 428. Also the Ford truck series (FT) are all externally balanced, so keep this in mind if you are using the heavy duty forged steel cranks from the FT in your FE buildups. Using mismatched harmonic balancers, cranks, or flywheels is guaranteed to cause vibration problems. There is no two ways about it, it will occur, and it will be very noticeable. As a matter of fact, it will result in destroyed bearings in short order.


Quote:
Small block Ford harmonic balancers and flywheels used 28oz counterweights in the early years then switched to 50oz. Mixing the two varieties will cause serious engine balance problems.
-VIBRATION ANALYSIS-FORD MUSCLE-

Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 02-23-2006, 08:12 AM
Registered User
 
Join Date: Jan 2006
Location: mexico
Posts: 5
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Thank`s for the information but like I said,I did solve the problem wich it was the flexplate.The question was where the 28 or 50oz are.On counterweights or where,because if you take off the counterweight that is welded on flexplate,that piece of stell does not weight 28 or 50 oz.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 02-25-2006, 12:19 AM
View 24 albums at Moes Garage
 
Last photo:
Join Date: Feb 2006
Location: Alberta Canada
Posts: 24
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Its called an 'imbalance'...

and is measured at a certain preset rpm at a certain distant from the centre (of axis) of the flywheel.....

- 28 and 50 ounce 'imbalance' - (not counterweight) would therefor refer to xx grams or ounces of weight at x inchs from the center of axis at xxxx rpm.

The actual counterweight 'may' be 2 ounces of weight, but at x inches from axis times engine rpm you would get (28 or 50) ounces of imbalance.

The two terms "counterweight" and "imbalance" are not interchanable as "counterweight" refers to a 'static' weight (non moving) and "imbalance" refers to a 'kinetic' and in this case, 'rotating force'


moe


--------------------------------------------------------

http://spaces.msn.com/moes-garage/
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 02-25-2006, 12:25 AM
View 24 albums at Moes Garage
 
Last photo:
Join Date: Feb 2006
Location: Alberta Canada
Posts: 24
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
----

To further answer your question,
The imbalance is the weight on the flexplate ....



moe


-------------------------------------

http://spaces.msn.com/moes-garage/
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 02-25-2006, 12:29 AM
View 24 albums at Moes Garage
 
Last photo:
Join Date: Feb 2006
Location: Alberta Canada
Posts: 24
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:


"""Small block Ford harmonic balancers and flywheels used 28oz counterweights in the early years then switched to 50oz. Mixing the two varieties will cause serious engine balance problems. """




I dont know who your quoting but they used 28oz/50oz Imbalance not 28oz/50oz counterweights




moe

-------------------------------------

http://spaces.msn.com/moes-garage/
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 02-25-2006, 03:07 AM
aka Duke of URL
 
Last wiki edit: Finding vacuum leaks Last photo:
Join Date: Oct 2001
Location: Rockville, MD
Posts: 4,821
Wiki Edits: 1

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by moefuzz


"""Small block Ford harmonic balancers and flywheels used 28oz counterweights in the early years then switched to 50oz. Mixing the two varieties will cause serious engine balance problems. """

I dont know who your quoting but they used 28oz/50oz Imbalance not 28oz/50oz counterweight.
And correct you are sir. Thanx for the detailed explanation. The quote only added to the reader's confusion.

The actual quote is from FORD MUSCLE MAGAZINE (referring URL in previous post) and I did not catch that detail. I would tip my hat but the resulting glare into your eyes may be the basis for a resulting lawsuit...



Am Looking For Factory/Aftermarket Speed Parts For The MEL (Merc-Edsel-Linc-TBird) Engine Family (383-410-430-462) Produced From 1958 To 1968

Also Early FORD Special Service Tools


-MEL ENGINE FORUM-
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 02-26-2006, 01:53 AM
View 24 albums at Moes Garage
 
Last photo:
Join Date: Feb 2006
Location: Alberta Canada
Posts: 24
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Kultulz,


I checked out the FORD MUSCLE MAGAZINE and there is a lot of good tech there.
With so many articles and so much tech there is bound to be the odd mistake.
(A recent flathead article in a popular Hotrod magazine was loaded with misconceptions..)
But Nobodies emune to screwing up. I take my turn often enough.

As far as the Ford Nuscle Magazine website goes, I checked around to see if there was a "feedback" button to report the mistake but no such luck. Not sure if you have to be a member or what. But Being that it is a Magazines website I expect a good amount of people view that link everyday, It begs for a correction.

By the way, good choice on playing with the MEL stuff. I wish I still had my 65 lincoln with the 462. But it's looonnnng gone.

cheers.


---------------------------------

moe is in the garage

http://spaces.msn.com/MOES-GARAGE/
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 02-27-2006, 06:29 PM
Registered User
 
Join Date: Jan 2006
Location: Chico, CA
Posts: 50
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
The "quote" is wrong in another way also. The 351W did not switch to 50 oz imbalance. It has been 28 oz all it's production life.
Reply With Quote Quick reply to this message

Recent Transmission - Rearend posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may 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
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Small Block Chevy 400 flexplate install novajohnb Engine 2 10-31-2002 03:53 PM


All times are GMT -6. The time now is 11:40 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.