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Post By xb-60
04-24-2022, 07:24 AM
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CC Member
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Join Date: Jul 2021
Location: Phoenix,
AZ
Cobra Make, Engine: Shell Valley, Blueprint 351, St. 408
Posts: 18
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Not Ranked
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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04-24-2022, 10:38 AM
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CC Member
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Join Date: Feb 2006
Location: Gilroy,
CA
Cobra Make, Engine: SPF 2291, Whipple Blown & Injected 4V ModMotor
Posts: 2,726
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Use manufacturer specs.
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Help them do what they would have done if they had known what they could do.
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04-25-2022, 09:46 AM
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CC Member
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Join Date: Feb 2014
Location: White City,
SK
Cobra Make, Engine: West Coast, 460 CID
Posts: 2,908
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Quote:
Originally Posted by Phoenixjeff
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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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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Brian
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04-25-2022, 10:10 AM
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CC Member
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Join Date: Feb 2004
Cobra Make, Engine: shellvalley 428 ford
Posts: 397
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Jeff, go to Speedways website. they list all torque specs for their products
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04-26-2022, 06:48 AM
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CC Member
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Join Date: Jul 2021
Location: Phoenix,
AZ
Cobra Make, Engine: Shell Valley, Blueprint 351, St. 408
Posts: 18
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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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04-26-2022, 09:30 AM
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Join Date: Feb 2014
Location: White City,
SK
Cobra Make, Engine: West Coast, 460 CID
Posts: 2,908
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Quote:
Originally Posted by byron w
Jeff, go to Speedways website. they list all torque specs for their products
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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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Brian
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04-26-2022, 12:10 PM
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Cobra Make, Engine: shellvalley 428 ford
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04-26-2022, 12:12 PM
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Cobra Make, Engine: shellvalley 428 ford
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04-27-2022, 07:13 AM
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Join Date: Jul 2021
Location: Phoenix,
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Cobra Make, Engine: Shell Valley, Blueprint 351, St. 408
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Byron w. Exactly what I was looking for!!!!! Many thanks.....
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04-27-2022, 07:44 AM
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CC Member
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Join Date: Feb 2004
Cobra Make, Engine: shellvalley 428 ford
Posts: 397
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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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04-28-2022, 04:45 AM
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Join Date: Aug 2009
Location: Adelaide,
SA
Cobra Make, Engine: AP 289FIA 'English' spec.
Posts: 13,151
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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 |
05-01-2022, 12:31 AM
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Join Date: Jun 2000
Location: Cape Town, South Africa/Mainz, Germany,
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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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05-11-2022, 03:52 PM
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Join Date: Jul 2021
Location: Phoenix,
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Cobra Make, Engine: Shell Valley, Blueprint 351, St. 408
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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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05-11-2022, 10:13 PM
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CC Member
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Join Date: Aug 2009
Location: Adelaide,
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Cobra Make, Engine: AP 289FIA 'English' spec.
Posts: 13,151
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Quote:
Originally Posted by Dominik
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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