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Author Topic: Piston speed and longevity, should I go longer stroke?  (Read 5963 times)

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HILLSIDECYCLE.COM

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Re: Piston speed and longevity, should I go longer stroke?
« Reply #15 on: March 06, 2014, 01:02:33 PM »

S&S has something up their sleeve........ ;)
Scott
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Snakebyte

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Re: Piston speed and longevity, should I go longer stroke?
« Reply #16 on: March 07, 2014, 01:46:16 AM »

My crankshaft now has all the work done, but I'm going to be pretty hard on this build and the rods having no races have me worried. I need to find out if the SE has races for sure. I thought I read somewhere they did.. Tman has a nice rotating service with h beam rods but I hear those h beams are overkill and too heavy, not to mention I think you need a crank to start with. That's why the SE crank is so tempting. It's forged, lighter, balanced, shorter rods. Heck all I need to do is weld it.
Not worried about budget for now it's going to take a year to get things together. As far as right now budget is minimum 2400, I have at least that now to work with.
As far as builder, I will be assembling. Just need to find a head porter. I have all spring and summer to do that.

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FlaHeatWave

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Re: Piston speed and longevity, should I go longer stroke?
« Reply #17 on: March 07, 2014, 02:22:24 AM »

The S&S Cranks are hard to beat.
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Snakebyte

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Re: Piston speed and longevity, should I go longer stroke?
« Reply #18 on: March 07, 2014, 04:53:44 AM »

Not really familiar with S&S cranks or S&S in general. Are they good? Do they have races in the connecting rods?
I hear that they have a smaller crank pin?
I saw the video on you tube. But that just raised more questions. Was that crank ran trough some heat cycles or fresh off the press?
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TorqueInc

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Re: Piston speed and longevity, should I go longer stroke?
« Reply #19 on: March 07, 2014, 08:32:51 AM »

  S&S changed the cranks a year or so back....they have the larger crankpin ala the stock cranks but they put a tapered plug in the crankpin to keep it from going out of true....I have heard nothing but good.

  I think the new rods are induction hardened so no races.

 Good snag on the 110 heads in the right hands they are pretty decent
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Snakebyte

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Re: Piston speed and longevity, should I go longer stroke?
« Reply #20 on: March 07, 2014, 11:18:25 AM »

  S&S changed the cranks a year or so back....they have the larger crankpin ala the stock cranks but they put a tapered plug in the crankpin to keep it from going out of true....I have heard nothing but good.

  I think the new rods are induction hardened so no races.

 Good snag on the 110 heads in the right hands they are pretty decent

On that note I have heard that the plugs are also longer than others so I guess thats a plus also..

I wander if anyone has races installed in their cranks or is this a thing of the past. ???
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TorqueInc

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Re: Piston speed and longevity, should I go longer stroke?
« Reply #21 on: March 08, 2014, 12:47:04 AM »

there is a boss that extends into the combustion chamber for the plug

  most people use a .060-.080 shim under the plug and sand a lot of the boss out of the chamber
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Snakebyte

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Re: Piston speed and longevity, should I go longer stroke?
« Reply #22 on: March 08, 2014, 02:03:53 AM »

there is a boss that extends into the combustion chamber for the plug

  most people use a .060-.080 shim under the plug and sand a lot of the boss out of the chamber

What would be the reason for getting rid of the boss? Doesn't seem like it would hinder any flow. I guess it could be a potential hot spot, but don't see any sharp edges.
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Snakebyte

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Re: Piston speed and longevity, should I go longer stroke?
« Reply #23 on: March 08, 2014, 02:06:04 AM »

On that note I have heard that the plugs are also longer than others so I guess thats a plus also..

I wander if anyone has races installed in their cranks or is this a thing of the past. ???

I was actually talking about the crank pin plugs. I hear that they are longer which supports the flywheels better.  :nixweiss:
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HILLSIDECYCLE.COM

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Re: Piston speed and longevity, should I go longer stroke?
« Reply #24 on: March 10, 2014, 11:20:50 AM »

What would be the reason for getting rid of the boss? Doesn't seem like it would hinder any flow. I guess it could be a potential hot spot, but don't see any sharp edges.

It does affect when flow testing.............and there is an additional cfm number that it does create, from .100" of lift on up thru.
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FlaHeatWave

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Re: Piston speed and longevity, should I go longer stroke?
« Reply #25 on: March 10, 2014, 02:21:02 PM »

Not really familiar with S&S cranks or S&S in general. Are they good? Do they have races in the connecting rods?
I hear that they have a smaller crank pin?
I saw the video on you tube. But that just raised more questions. Was that crank ran trough some heat cycles or fresh off the press?

'Using their crank, Premium Lifters and Roller Rockers in my mild 117 Build.
http://www.sscycle.com/ 
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TorqueInc

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Re: Piston speed and longevity, should I go longer stroke?
« Reply #26 on: March 10, 2014, 06:32:01 PM »

'Using their crank, Premium Lifters and Roller Rockers in my mild 117 Build.
http://www.sscycle.com/

   Good call  :2vrolijk_21:
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HILLSIDECYCLE.COM

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Re: Piston speed and longevity, should I go longer stroke?
« Reply #27 on: March 11, 2014, 07:28:29 AM »

Not really familiar with S&S cranks or S&S in general. Are they good? Do they have races in the connecting rods?
I hear that they have a smaller crank pin?
I saw the video on you tube. But that just raised more questions. Was that crank ran trough some heat cycles or fresh off the press?

Everyone, that is doing anything, including the Moco,(S&S performs the Engine Re-Man work for H-D, for instance) is walking on the coatails, and in the shadow of S&S.
Industry innovators/manufacturer's of H-D speed parts, for over 1/2 a century now.
Scott
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Snakebyte

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Re: Piston speed and longevity, should I go longer stroke?
« Reply #28 on: March 11, 2014, 09:07:03 AM »

Just for information purposes are the S&S flywheels forged? The web site says 114% stronger.
Looking more and more  at the S&S replacement crank for the 120r.
« Last Edit: March 11, 2014, 01:22:17 PM by Snakebyte »
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TorqueInc

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Re: Piston speed and longevity, should I go longer stroke?
« Reply #29 on: March 11, 2014, 11:16:02 PM »

Yep the S&S wheels are forged,the new wheels are both stronger in theory and in reality.

 Check youtube or s&s's website plenty of videos from them explaining what&why they changed the wheels.
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