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ps2375
Samba Member
Joined: April 24, 2014
Posts: 2471
Location: Meridian,ID
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 Posted: Sun Feb 22, 2015 8:32 pm Post subject: |
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| Brian wrote: |
| add to balance? I thought it was removing to balance? |
Depends upon if there is something there to remove. I'm pretty sure when the welded cooling fans are balanced, weight is added(with a weld) as there is not enough of anything to remove. It actually could be done either way when balancing something. |
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SBD
Samba Member
Joined: October 24, 2012
Posts: 3269
Location: SOUTH DAKOTA
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| Posted: Tue Feb 24, 2015 10:50 am Post subject: |
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Sometimes Mallory metal is added to cranks to balance them. Tire/wheel assemblies are normally balanced by adding weight.
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| mark tucker wrote: |
| I wouldent waste $ or thyme on building a small motor. build it big so it dosent have to work hard.remember it's only as fast as your foot alows it to be unless you build a small turd then it just stinks as it squishes up through your toes when you step on it. |
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mark tucker
Samba Member
Joined: April 08, 2009
Posts: 23937
Location: SHALIMAR ,FLORIDA
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| Posted: Tue Feb 24, 2015 10:56 am Post subject: |
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| when you cant lighten something enough or at all you add weight 180 degrees away from the heavy spot. |
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mikedjames
Samba Member
Joined: July 02, 2012
Posts: 2736
Location: Hamble, Hampshire, UK
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| Posted: Wed Feb 25, 2015 2:59 pm Post subject: |
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You can shift a resonance when e.g. the entire crank bows up and down between the bearings by either adding or subtracting mass somewhere in the system.
Some of that mass change like with welded cranks can directly balance other masses.
The crank can still resonate but at a different engine rpm as changing mass does not subtract energy so it is not really a dampener.
Changing the flywheel and pulley masses will move the resonant frequencies of the crank up or down away from a danger spot and may change the way the crank whips around when it resonates.
So going either heavy or light pulley may avoid a particular RPM range that causes a disaster.
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Ancient vehicles and vessels
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Engine 1: 40k miles (rocker shaft clip fell off), Engine 2: 30k miles (rebuild, dropped valve). Engine 3: a JK Preservation Parts "new" engine, aluminium case: 26k miles: new top end.
Gearbox rebuild 2021 by Bears.
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esde
Samba Member
Joined: October 20, 2007
Posts: 5967
Location: central rust belt
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| Posted: Wed Feb 25, 2015 5:28 pm Post subject: |
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| Didn't Fisher Buggies make a true damper at one time? Was it a fluid damper, or a traditional rubber bonded type? |
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vwracerdave
Samba Member
Joined: November 11, 2004
Posts: 15302
Location: Deep in the 405
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| Posted: Wed Feb 25, 2015 6:30 pm Post subject: |
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| esde wrote: |
| Didn't Fisher Buggies make a true damper at one time? Was it a fluid damper, or a traditional rubber bonded type? |
Fisher is an independent company that manufactures harmonic balancers and are not related to the Fisher Buggies that sells VW parts..
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2017 Street Comp Champion - Thunder Valley Raceway Park - Noble, OK
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67 Sunroof
Samba Member
Joined: February 22, 2014
Posts: 1836
Location: Salisbury, MD
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| Posted: Wed Feb 25, 2015 7:29 pm Post subject: |
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| mikedjames wrote: |
You can shift a resonance when e.g. the entire crank bows up and down between the bearings by either adding or subtracting mass somewhere in the system.
Some of that mass change like with welded cranks can directly balance other masses.
The crank can still resonate but at a different engine rpm as changing mass does not subtract energy so it is not really a dampener.
Changing the flywheel and pulley masses will move the resonant frequencies of the crank up or down away from a danger spot and may change the way the crank whips around when it resonates.
So going either heavy or light pulley may avoid a particular RPM range that causes a disaster. |
I agree. It only shifts the resonant frequency up or down. I learned a lot of this from experimenting with car audio back in the day and building boxes.
I read that the heavier pullies put more stress on the crank when launched from a hard start or clutch drops in racing. It caused the crank to twist which seems kinda likely.
The way I saw it was I wanted a street driven (never raced or launched hard) motir and I thought the added mass would keep the inertia up when driving helping me to get .00003 more miles per gallon😝
I don't particularly like a light flywheel for a daily driven car. The rpm's drop too fast and it's hard to shift and drive. I decided to just stay with the stock flywheel and a heavier pulley. Only time will tell. |
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esde
Samba Member
Joined: October 20, 2007
Posts: 5967
Location: central rust belt
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| Posted: Wed Feb 25, 2015 8:16 pm Post subject: |
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| vwracerdave wrote: |
| esde wrote: |
| Didn't Fisher Buggies make a true damper at one time? Was it a fluid damper, or a traditional rubber bonded type? |
Fisher is an independent company that manufactures harmonic balancers and are not related to the Fisher Buggies that sells VW parts.. |
Ok, is there any more info on them? Did people have good luck with them? Why did they stop production?
Here are some pics from the gallery
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vwracerdave
Samba Member
Joined: November 11, 2004
Posts: 15302
Location: Deep in the 405
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| Posted: Wed Feb 25, 2015 8:27 pm Post subject: |
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| esde wrote: |
| Ok, is there any more info on them? Did people have good luck with them? Why did they stop production? |
When they got to the $400 price range people quit buying them.
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2017 Street Comp Champion - Thunder Valley Raceway Park - Noble, OK
2010 Sportsman ET Champion - Mid-America Dragway - Arkansas City, KS
1997 Sportsman ET Champion - Thunder Valley Raceway Park - Noble ,OK
Featured in Dec. 2001 HOT VW's Magazine page 63
Watch my racing video's http://www.youtube.com/user/okvwracer/videos |
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67 Sunroof
Samba Member
Joined: February 22, 2014
Posts: 1836
Location: Salisbury, MD
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| Posted: Wed Feb 25, 2015 9:01 pm Post subject: |
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| Ooooooh, that's purdy! Yeah, at $400 peeps couldn't justify the price I guess. |
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[email protected]
Samba Member
Joined: August 03, 2002
Posts: 12785
Location: Salt Lake City, Utah
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| Posted: Wed Feb 25, 2015 9:06 pm Post subject: |
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VW guys have always been too cheap. I have 2 of those pulleys, they are awesome.
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chrisflstf
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Joined: February 10, 2004
Posts: 3439
Location: San Diego
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| Posted: Wed Feb 25, 2015 11:18 pm Post subject: |
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Want to sell one?  |
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jason
Samba Member
Joined: August 07, 2002
Posts: 3444
Location: Garage
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| Posted: Fri Feb 27, 2015 9:18 am Post subject: |
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| Who made them I'm confused? Fisher buggies or Fisher dampers? Looking for one. |
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ps2375
Samba Member
Joined: April 24, 2014
Posts: 2471
Location: Meridian,ID
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| Posted: Fri Feb 27, 2015 9:44 am Post subject: |
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| jason wrote: |
| Who made them I'm confused? Fisher buggies or Fisher dampers? Looking for one. |
Go up 2/3 of this page. Pretty clearly put. |
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[email protected]
Samba Member
Joined: August 03, 2002
Posts: 12785
Location: Salt Lake City, Utah
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| Posted: Fri Feb 27, 2015 9:53 am Post subject: |
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Fisher Dampers made them. They closed shop, gone.
They were not at all associated with Fisher buggies.
You will likely not find any out there, we only sold around 20 of them. I have 2 and a buddy of mine has one. So there are 17 left, since neither of us is selling.
It tells a lot that most VW guys are not willing to pay the money for items until after they are NLA. I have seen this with a lot of great products.
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Steve Arndt
Samba Member
Joined: August 01, 2005
Posts: 1780
Location: Boise, Idaho
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| Posted: Fri Feb 27, 2015 12:18 pm Post subject: |
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Those are pics of my engine and pulley. Still working nice. My bearings look perfect every time I've checked  |
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Steve Arndt
Samba Member
Joined: August 01, 2005
Posts: 1780
Location: Boise, Idaho
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| Posted: Fri Feb 27, 2015 12:20 pm Post subject: |
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| I joke with people that I have a 400 dollar pulley mounted on a 300 dollar CB crankshaft |
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[email protected]
Samba Member
Joined: August 03, 2002
Posts: 12785
Location: Salt Lake City, Utah
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| Posted: Fri Feb 27, 2015 12:36 pm Post subject: |
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You idiot, I was trying to keep your identity on the down low. Now you'll be innundated with purchase offers on your pulley
| Steve Arndt wrote: |
| Those are pics of my engine and pulley. Still working nice. My bearings look perfect every time I've checked |
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It's just advice, do whatever you want with it!
Please do NOT send me Private Messages through the Samba PM System (I will not see them). Send me an e-mail to john at aircooled dot net
"Like" our Facebook page at
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SoCalJes
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Joined: November 02, 2011
Posts: 1093
Location: Broward, FL
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| Posted: Fri Feb 27, 2015 1:04 pm Post subject: |
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^^^
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Jesse
71 Ghia
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Just because it didn't come that way, doesn't mean it shouldn't have. |
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jason
Samba Member
Joined: August 07, 2002
Posts: 3444
Location: Garage
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| Posted: Fri Feb 27, 2015 1:48 pm Post subject: |
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| Thanks ps2375 but reading it again won't unconfuse me. It only says they are two seperates companies. Thanks John. |
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