Hello! Log in or Register   |  Help  |  Donate  |  Buy Shirts See all banner ads | Advertise on TheSamba.com  
TheSamba.com
 
Crank balancing
Forum Index -> Performance/Engines/Transmissions Share: Facebook Twitter
Reply to topic
Print View
Quick sort: Show newest posts on top | Show oldest posts on top View previous topic :: View next topic  
Author Message
128vw
Samba Member


Joined: April 05, 2006
Posts: 222
Location: Western Massachusetts
128vw is offline 

PostPosted: Tue Feb 10, 2009 7:43 am    Post subject: Crank balancing Reply with quote

I sent my 84mm crank out to be banced at my local machine shop and they called this AM and said that they could not do it on their machine.
I then called another shop that specializes in crank work and they say they have the same machine and could not do it. Does this take a special macine or what? Who in my area can do it, Western Massachusetts?
Back to top
View user's profile Send private message Gallery Classifieds Feedback
madmike
Samba Member


Joined: July 11, 2005
Posts: 5291
Location: Atlanta,Michigan
madmike is offline 

PostPosted: Tue Feb 10, 2009 8:10 am    Post subject: Reply with quote

Nick is kind of close?? Confused
_________________
'Black Ice'Drag Buggy 'Turbo'
Rail Buggy 1915 turbo
76 Drag/Street bug 2180cc 'Turbo' 11:85 @113 mph"If I go any faster I'll burn up the Hamster" ,gets 28 mpg. also 10/09/22 11.90 @115 mph
"If I'm ever on Life Support,UNPLUG Me, Then Plug me back In see if that Works"
Back to top
View user's profile Send private message Send e-mail Gallery Classifieds Feedback
werka
Samba Member


Joined: August 25, 2006
Posts: 1110
Location: Huntsville, AL
werka is offline 

PostPosted: Tue Feb 10, 2009 9:25 am    Post subject: Reply with quote

There are a couple folks on this forum that do this. I believe NSRacing does. I don't know anything about him, but I am pretty sure he does.

Also, I think most folks do the entire rotating assembly (pulley, crank, rods, flywheel, and pressure plate). Everything is balanced together this way.

There was a thread recently on this (it gets a little out of hand towards the end), but NSR has some posts in it.

http://www.thesamba.com/vw/forum/viewtopic.php?t=340458

See page 3 for nsracing posts. you can pm him off these.
Back to top
View user's profile Send private message Send e-mail Gallery Classifieds Feedback
grimace007
Samba Member


Joined: August 30, 2006
Posts: 2673
Location: swampville, florida
grimace007 is offline 

PostPosted: Tue Feb 10, 2009 1:25 pm    Post subject: Reply with quote

to me that doesnt make sense. i was under the impression that a crank balancer is a crank balancer not for any specific type of crankshaft

we will see what the gods say Wink lol
_________________
Brian
68 sedan

Dallas Air Coolers
perrib wrote:
Hey It is The Samba where well thought out rational answers can take a while and getting side tracked is normal. I was just lucky this time. Smile

cr@M wrote:


No one has any personal responsibility these days. This country is sue happy. Intelligence is no longer a requirement, just an accessory.
Back to top
View user's profile Send private message Send e-mail AIM Address Gallery Classifieds Feedback
128vw
Samba Member


Joined: April 05, 2006
Posts: 222
Location: Western Massachusetts
128vw is offline 

PostPosted: Tue Feb 10, 2009 3:26 pm    Post subject: Reply with quote

They tell me that they support the crank on both ends and drive off the center main. With their set up they have no room to get to the center main because their fixtures are too close together.

I found a shop in Greenfield MA about 40 miles away that says they can do it on their machine. I'll find out. They have a good rep around here. Thanks
Back to top
View user's profile Send private message Gallery Classifieds Feedback
Max Welton
Samba Member


Joined: May 19, 2003
Posts: 10697
Location: Black Forest, CO
Max Welton is offline 

PostPosted: Tue Feb 10, 2009 5:28 pm    Post subject: Reply with quote

grimace007 wrote:
to me that doesnt make sense. i was under the impression that a crank balancer is a crank balancer not for any specific type of crankshaft

That has been my experience. I just took all my rotating parts to the local shop that does V8s for the hot-rod crowd.

But I wouldn't know one balancing machine from another.

Max
_________________
1967 Type-3 Fastback
Under the Knife https://shoptalkforums.com/viewtopic.php?f=24&t=151582
Home Stretch https://www.thesamba.com/vw/forum/viewtopic.php?t=767836
Back to top
View user's profile Send private message Send e-mail Gallery Classifieds Feedback
Bashr52
Samba Member


Joined: July 16, 2006
Posts: 5666
Location: On an island in VA
Bashr52 is offline 

PostPosted: Tue Feb 10, 2009 7:02 pm    Post subject: Reply with quote

IF they can fit cranks from an 8cylinder, a short little vw crank should be no prob?
Back to top
View user's profile Send private message Gallery Classifieds Feedback
nsracing
Samba Member


Joined: November 16, 2003
Posts: 9437
Location: NOVA
nsracing is offline 

PostPosted: Wed Feb 11, 2009 10:31 am    Post subject: Reply with quote

Bashr52 wrote:
IF they can fit cranks from an 8cylinder, a short little vw crank should be no prob?


Some older larger balancers have the "underarm" drive belt. It is between the trunnions. With the shorter VW crank, the arm is too large to fit under to drive the crank.

They can set it up so it is "overarm" drive but probably too lazy for that. Or they do not want to swap narrower belt. Or too lazy to move the trunnions closer together. Who knows.
Back to top
View user's profile Send private message Send e-mail Gallery Classifieds Feedback
Ann Mezger
Samba Member


Joined: October 13, 2003
Posts: 933
Location: Delaware
Ann Mezger is offline 

PostPosted: Wed Feb 11, 2009 12:25 pm    Post subject: Re: Crank balancing Reply with quote

128vw wrote:
I sent my 84mm crank out to be banced at my local machine shop and they called this AM and said that they could not do it on their machine.
I then called another shop that specializes in crank work and they say they have the same machine and could not do it. Does this take a special macine or what? Who in my area can do it, Western Massachusetts?


VW Cranks have needs of their own & when it comes to most machine shops that can do balancing & other work, it would be cost prohibitive to re-set the machines / tooling to perform one time jobs. The places that can do it, may not find it worth the time unless you're willing to pay additional fees which usually outweigh the cost of shipping the part to someone who is already set up for it.
With that in mind, I have Demello Machine Shop do all of my crank work / balancing on the air-cooled VW stuff. Knowing it will be done right is worth the shipping.
_________________
www.vintageperformance.net
Back to top
View user's profile Send private message Visit poster's website Gallery Classifieds Feedback
Jake Raby
Samba Member


Joined: August 23, 2003
Posts: 7433
Location: Aircooled Heaven USA
Jake Raby is offline 

PostPosted: Wed Feb 11, 2009 1:15 pm    Post subject: Reply with quote

The crank is the easiest dynamic component to balance and due to diameter imbalance effects it less than larger diameter components like the flywheel and pressure plate.

I do all my balance work in house, but I won't balance a crankshaft without the rest of the dynamic assembly... Its simply a waste of time.
_________________
Jake Raby
Raby Engine Development
www.rabyenginedevelopment.com
"I've never given anyone Hell, I just told them the truth and they thought it was Hell"
Back to top
View user's profile Send private message Visit poster's website Facebook Gallery Classifieds Feedback
128vw
Samba Member


Joined: April 05, 2006
Posts: 222
Location: Western Massachusetts
128vw is offline 

PostPosted: Thu Feb 12, 2009 11:06 am    Post subject: Reply with quote

Well I had the shop in Greenfield do it. He balanced the pistons, rods,crank, flywheel and clutch all for $200. Did it in 2 days and said that it was not a problem. He couldn't understand what the other shop had for a problem. Maybe they didn't want to take the time to set up their machine for a "little" VW. It's a welded stroker, 84mm, and he said it was not out much at all.

Thanks for the help. Tom
Back to top
View user's profile Send private message Gallery Classifieds Feedback
Display posts from previous:   
Reply to topic    Forum Index -> Performance/Engines/Transmissions All times are Mountain Standard Time/Pacific Daylight Savings Time
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum

About | Help! | Advertise | Donate | Premium Membership | Privacy/Terms of Use | Contact Us | Site Map
Copyright © 1996-2023, Everett Barnes. All Rights Reserved.
Not affiliated with or sponsored by Volkswagen of America | Forum powered by phpBB
Links to eBay or other vendor sites may be affiliate links where the site receives compensation.