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Author Topic: New Zipper's dual-piston cam tensioners  (Read 24011 times)

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HILLSIDECYCLE.COM

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New Zipper's dual-piston cam tensioners
« on: May 17, 2012, 08:45:59 AM »

Part # 413-901.
These look to be a very well thought out product, for the hydraulic cam chain set-ups.
Scott
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Twolanerider

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Re: New Zipper's dual-piston cam tensioners
« Reply #1 on: May 17, 2012, 11:06:18 AM »

Or....  a manufacturer's/advertiser's relatively expensive solution to a problem that's not proven to be a real problem.  So many marketers act like if they throw a product in front of us we'll queue up like lemmings with open wallets.

$160 aftermarket tensioners to replace Mother Harley's that can be had for $80 before any discount.  Wouldn't do that if they came from shop I actually liked.  From Zippers not a chance.

Link to the product page and pics of the pieces in question:

http://www.zippersperformance.com/catalogue/showproduct.asp?cat=588&prod=2308
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HILLSIDECYCLE.COM

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Re: New Zipper's dual-piston cam tensioners
« Reply #2 on: May 17, 2012, 01:35:36 PM »

Guess the gavel has fallen..........
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Twolanerider

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Re: New Zipper's dual-piston cam tensioners
« Reply #3 on: May 17, 2012, 01:57:16 PM »

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gabe

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Re: New Zipper's dual-piston cam tensioners
« Reply #4 on: May 20, 2012, 06:20:01 PM »

 have a set coming for my build  the more parts in my motor that done say hd on them the happier i will be
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CVODON

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Re: New Zipper's dual-piston cam tensioners
« Reply #5 on: May 20, 2012, 08:47:29 PM »

I have heard nothing bad about  the HD ones, and they WILL answer the phone when I call the dealer if I have a problem (unlike some other companies).
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AXIL

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Re: New Zipper's dual-piston cam tensioners
« Reply #6 on: May 20, 2012, 10:12:05 PM »

   Ah...one or two..same oil pressure, same oil volume. I'll stay with the stock one.
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jagonza1

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Re: New Zipper's dual-piston cam tensioners
« Reply #7 on: May 21, 2012, 01:48:53 AM »

Are these for the old or new style chains. if they are for the old style then they might have something here cause the old one need to be changed every 25,000 if they are for the new ones then they would not be worth it.
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Re: New Zipper's dual-piston cam tensioners
« Reply #8 on: May 21, 2012, 03:45:18 AM »

Are these for the old or new style chains. if they are for the old style then they might have something here cause the old one need to be changed every 25,000 if they are for the new ones then they would not be worth it.

These are replacements for the new style tensioners.  The follow on product to this will be an improved dipstick wiping cloth.  It too will cost twice as much.  Vendors will look to shill that product for its greater margin also.
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HILLSIDECYCLE.COM

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Re: New Zipper's dual-piston cam tensioners
« Reply #9 on: May 21, 2012, 07:05:44 AM »

Don't really care, if we sell one single unit.
Will not change my lifestyle either way.
Just thought folks would like to be kept abreast, of the latest innovation from that company.
Scott
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eleft36

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Re: New Zipper's dual-piston cam tensioners
« Reply #10 on: May 21, 2012, 08:04:09 AM »

Don't really care, if we sell one single unit.
Will not change my lifestyle either way.
Just thought folks would like to be kept abreast, of the latest innovation from that company.
Scott

Thanks Scott,
I like to know about all the new stuff on the market and you are a credible source.
I would add these to my next cam change if I were to change.
What's $160 vs the price of improved accuracy or maybe future failure?
I'm not an engineer but the concept looks like an improvement.
Al
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HILLSIDECYCLE.COM

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Re: New Zipper's dual-piston cam tensioners
« Reply #11 on: May 21, 2012, 10:48:46 AM »

Happy to share the info. :2vrolijk_21:
Scott
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Re: New Zipper's dual-piston cam tensioners
« Reply #12 on: May 21, 2012, 12:16:34 PM »

Thanks Scott,
I like to know about all the new stuff on the market and you are a credible source.
I would add these to my next cam change if I were to change.
What's $160 vs the price of improved accuracy or maybe future failure?
I'm not an engineer but the concept looks like an improvement.
Al

That's what a lot of these companies count on Al, most folks aren't engineers but they look at a forged part next to the stock stuff for instance and just assume the forged stuff is better.  Or a really big thing in the Harley world is stuff machined from billet.  Really looks nice and solid, but in many cases it doesn't actually perform any better than the less expensive stock stuff.  So looks aren't the deciding factor to an engineer, especially on a part that isn't normally visible.  A engineer wants to see performance data that proves a measureable benefit for the added cost.  Advertising puffery doesn't count as measureable data, btw.

Has anyone actually documented a serious deficiency in the stock design that would lead to a need to upgrade?  And what exactly is it about the Zipper's design that supposedly improves cam timing accuracy?  That was an issue in the old days with the spring loaded tensioner's and the sloppy fit of the cam gears, but I haven't heard that story since Harley went to the current system.  Do you suppose they've changed the size of the oil bleed orifice to add more force to the shoe and chain?  If so, do you suppose the added force might accelerate wear of the shoe and/or the chain?  Or is this claim just something pulled out of thin air because it sounds like a performance improvement?  Everyone likes power increases, even if they are really imaginary.

Hopefully you get my point, which is there is a serious lack of real data to prove this part is actually needed, or that this part actually provides a measureable benefit.  I would like to see the proof before I blindly accept claims in an ad, especially an ad from a company with a history of misleading claims.  


Jerry
« Last Edit: May 21, 2012, 01:21:21 PM by grc »
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eleft36

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Re: New Zipper's dual-piston cam tensioners
« Reply #13 on: May 22, 2012, 02:31:44 PM »

Jerry,

especially an ad from a company with a history of misleading claims.

OK, verify this.

Al
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Re: New Zipper's dual-piston cam tensioners
« Reply #14 on: May 22, 2012, 03:35:19 PM »

"The follow on product to this will be an improved dipstick wiping cloth."

Twolane, do you have the part number for this?  It will be the perfect compliment to my digital oil level/temp gauge/dipstick and Cobra PowrPro.



Scott, just ignore those wet-blanket-buzzkill skeptics (you know who you are!).  :zstupid:  They probably fried the cat in Wesson Oil (I hope that 70s reference isn't lost here).  Thanks for the info, your wisdom and input is always appreciated.   :2vrolijk_21: :asskiss emoticon:  Keep up the good work!

Dan
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