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Author Topic: cam tensioners  (Read 2700 times)

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HILLSIDECYCLE.COM

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Re: cam tensioners
« Reply #15 on: July 19, 2011, 06:59:12 AM »
Quote from: Ironhorse on July 17, 2011, 10:24:42 PM
Why doesn't HD use gear drive cams and do away with tensioners all together?

If the crank slips, or sissors, it'll rip the teeth off the gear drive(s) causing all types of V-Twin havoc.
Trust me, we've witnessed that. :'(
BTW those should NOT be installed if crankshaft T.I.R. is in excess of .003".
Scott
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willyB

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Re: cam tensioners
« Reply #16 on: July 19, 2011, 07:58:15 AM »
Properly installed gear driven cams will solved the issues forever!
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Re: cam tensioners
« Reply #17 on: July 19, 2011, 08:49:53 AM »
Quote from: willyB on July 19, 2011, 07:58:15 AM
Properly installed gear driven cams will solved the issues forever!

Wrong.  See the post above yours.  Even if your crank is within the recommended limits for TIR of the pinion shaft at the time you install the gears, that doesn't mean it will stay that way.  And when the crank scissors, it will destroy those gear drives a lot quicker than a chain system.  There is no "give" in gear drives. 


Jerry
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Midnight Rider

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Re: cam tensioners
« Reply #18 on: July 19, 2011, 09:45:35 AM »
Quote from: willyB on July 19, 2011, 07:58:15 AM
Properly installed gear driven cams will solved the issues forever!

From what little I know about the cranks in the 96" and the 110" motors, I would not even consider gear driven cams unless the cases were split and the crank was trued and welded.
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Re: cam tensioners
« Reply #19 on: July 19, 2011, 11:54:27 AM »
Quote from: sadunbar on July 18, 2011, 04:30:47 PM
details, details....   ::)

hell they did me a favor and saved me about 7500 by having a crooked crank..
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HILLSIDECYCLE.COM

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Re: cam tensioners
« Reply #20 on: July 19, 2011, 01:32:15 PM »
BUT, if all is well, a gear-driven cam set WILL show 2.5-4 hp, and 2.5-4 ft/lbs over/above it's chain-driven counterpart, as back/back testing, here, alerted us to that over a decade ago. :)
Scott
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Dead_Reckoning

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Re: cam tensioners
« Reply #21 on: August 02, 2011, 11:13:23 AM »

Could you distingush any change in engine noise when these started failing?????

Cheers
DR :)

Quote from: todd444 on July 14, 2011, 04:37:41 PM
here are a couple of pics of my tensioners at 47,167 miles
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Re: cam tensioners
« Reply #22 on: August 07, 2011, 09:21:02 PM »
Quote from: Ironhorse on July 17, 2011, 10:24:42 PM
Why doesn't HD use gear drive cams and do away with tensioners all together?
Then they'd have call the motor an Evo   ;D
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