Chrome Engine Kit Install on Softail Standard
Road Captain
Joined: Jun 2006
Posts: 581
Likes: 7
From: Portland, OR
RE: Chrome Engine Kit Install on Softail Standard
How do you compensate a specified torque spec when using a torque adapter?
Since no one answered my question about how do you calculate a torque spec when using a parallel torque extension, figured I might as well answer it myself. I surely hope every one realizes that when you add a parallel extension (dogbone or crow foot) to a torque wrench, you need to apply less torque in proportion to the length of the extension.
I sheered off a head bolt on my old 650 BSA back in the '70s from using one of those cheesy needle pointer torque wrenches. I had to take the whole dang head off to get to the case where the bolt resided and install a heli-coil. My 2 hr re-torque the heads and adjust the valves job turned out to be a 2 day job.
Here's a link to calculate the new torque value when using an extension.
http://www.engineersedge.com/manufacturing_spec/torque_wrench_1.htm
Road Warrior
Joined: Aug 2007
Posts: 1,727
Likes: 2
From: North Carolina
RE: Chrome Engine Kit Install on Softail Standard
ORIGINAL: priceamp
Since no one answered my question about how do you calculate a torque spec when using a parallel torque extension, figured I might as well answer it myself. I surely hope every one realizes that when you add a parallel extension (dogbone or crow foot) to a torque wrench, you need to apply less torque in proportion to the length of the extension.
I sheered off a head bolt on my old 650 BSA back in the '70s from using one of those cheesy needle pointer torque wrenches. I had to take the whole dang head off to get to the case where the bolt resided and install a heli-coil. My 2 hr re-torque the heads and adjust the valves job turned out to be a 2 day job.
Here's a link to calculate the new torque value when using an extension.
http://www.engineersedge.com/manufacturing_spec/torque_wrench_1.htm
How do you compensate a specified torque spec when using a torque adapter?
Since no one answered my question about how do you calculate a torque spec when using a parallel torque extension, figured I might as well answer it myself. I surely hope every one realizes that when you add a parallel extension (dogbone or crow foot) to a torque wrench, you need to apply less torque in proportion to the length of the extension.
I sheered off a head bolt on my old 650 BSA back in the '70s from using one of those cheesy needle pointer torque wrenches. I had to take the whole dang head off to get to the case where the bolt resided and install a heli-coil. My 2 hr re-torque the heads and adjust the valves job turned out to be a 2 day job.
Here's a link to calculate the new torque value when using an extension.
http://www.engineersedge.com/manufacturing_spec/torque_wrench_1.htm
That is great info! I avoided the math by avoiding that situation. If you attach the dogbone at a right angle, 90 degrees, there is minimal if any change in applied torque.Because you use it to get the torque wrench out from under the frame, the right angle technique works fine.
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anubisss
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