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  #1 (permalink)  
Old 04-24-2022, 06:24 AM
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Default Torque Specs

Good Morning Cobra Builders,
I am new to the site and new to building my first and hopefully not my last Cobra Replica (1967).

Question: Where do you all locate Torque Specs? Specifically in this case for Caliper Brackets, Slide Bolts, and Banjo Bolts for brake line attachment?

Many thanks for any and all help!

The Calipers are from Speedway Motors "910-31040" 2 3/4" Big Bore Brake Caliper fits 1978-88 Metric.
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Old 04-24-2022, 09:38 AM
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Use manufacturer specs.
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Old 04-25-2022, 08:46 AM
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Quote:
Originally Posted by Phoenixjeff View Post
Good Morning Cobra Builders,
I am new to the site and new to building my first and hopefully not my last Cobra Replica (1967).

Question: Where do you all locate Torque Specs? Specifically in this case for Caliper Brackets, Slide Bolts, and Banjo Bolts for brake line attachment?

Many thanks for any and all help!

The Calipers are from Speedway Motors "910-31040" 2 3/4" Big Bore Brake Caliper fits 1978-88 Metric.
If you can't find the GM specs for those calipers you might try the Wilwood instructions for their calipers that replace those in GM installations. Slide pin bolts are torqued to 35 ft-lbs. Banjo bolts are 96-120 in-lbs.

https://www.wilwood.com/PDF/DataSheets/ds842.pdf
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Old 04-25-2022, 09:10 AM
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Jeff, go to Speedways website. they list all torque specs for their products
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Old 04-26-2022, 05:48 AM
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I did call Speedway Motors yesterday, even he didn't seem to have definitive numbers for some of the brake parts I was asking for such as the Caliper Brackets. Between the two manuals I do have and torque specs by bolt size and thread pitch I should stay well within the ballpark. Thank you all.
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Old 04-26-2022, 08:30 AM
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Quote:
Originally Posted by byron w View Post
Jeff, go to Speedways website. they list all torque specs for their products
I don't know what Speedway website you're looking at, but torque specs for installing these calipers aren't listed. Feel free to provide a link if you find otherwise.
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Old 04-26-2022, 11:10 AM
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https://content.speedwaymotors.com/D...INS_2021_1.pdf
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Old 04-26-2022, 11:12 AM
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Heer ya go cycleguy55 https://content.speedwaymotors.com/D...INS_2021_1.pdf
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Old 04-27-2022, 06:13 AM
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Byron w. Exactly what I was looking for!!!!! Many thanks.....
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Old 04-27-2022, 06:44 AM
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Default torque specs

Jeff, they always have the specs in the information section of the product. It is just hard to find in the listing. Not really user friendly. Glad it helped.

Byron
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Old 04-28-2022, 03:45 AM
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Jeff, if you can't find a manufacturer's torque figure for a particular application, just google 'torque specs' and look for the diameter of the bolt/screw, the tpi (threads per inch) and the bolt/screw material.
If metric, it's similar ....bolt/screw diameter, then pitch in mm, and material.

Here's an easy one to follow...
https://www.fastenal.com/content/mer...ce%20Guide.pdf

Cheers,
Glen
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Old 04-30-2022, 11:31 PM
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Your required torque specs are typically fastener related if you aim to achieve proper clamping force. Best example: Cylinder heads or con rods. You stretch the fasteners into their elastic state to get them to act like a pre-loaded spring.

In your example, for the bracket to upright (did I get your question right?) use any engineering book or fastener supplier's handbook to find the torque specs. Make sure you use the correct (or no) lubricant.

To learn more about this "mess" get ARP's catalog & tech articles. And Carroll Smith's book about nut, bolts and fasteners.

https://www.amazon.com/Nuts-Bolts-Fa.../dp/B001OXCTSI
https://arp-bolts.com/p/technical.php
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Old 05-11-2022, 02:52 PM
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So helpful! Dominik thank you, I love books. I'm only a couple of weeks in and have learned so much. Thank you ALL!
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Old 05-11-2022, 09:13 PM
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Quote:
Originally Posted by Dominik View Post
Your required torque specs are typically fastener related if you aim to achieve proper clamping force. Best example: Cylinder heads or con rods. You stretch the fasteners into their elastic state to get them to act like a pre-loaded spring.

In your example, for the bracket to upright (did I get your question right?) use any engineering book or fastener supplier's handbook to find the torque specs. Make sure you use the correct (or no) lubricant.

To learn more about this "mess" get ARP's catalog & tech articles. And Carroll Smith's book about nut, bolts and fasteners.

https://www.amazon.com/Nuts-Bolts-Fa.../dp/B001OXCTSI
https://arp-bolts.com/p/technical.php
Good advice from Dominik, and sensible advice on Carroll Smith's books. A good one to start with is Carroll Smith's "Engineer to Win ...Understanding Race Car Dynamics".
No surprise that there's a chapter there on threaded fasteners. He can be quite entertaining as well as very informative.
And no, I'm not related

Cheers!
Glen
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