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10-22-2010, 05:21 PM
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CC Member
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Join Date: Dec 2009
Location: San Carlos, Carmel,
CA
Cobra Make, Engine: Kirkham #625 427S/C, 468 ci Al block, 615 HP
Posts: 100
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Not Ranked
Headrest
I have been unable to find a headrest for KMP625 that looks period correct so I fabricated one. I got the billet clamps from JEGS and then fabricated the rest from polished 6061 aluminum. The clamps are .125 over so I could isolate with rubber. The headrest is has a base of .375 6061 and is then upholstered with a hide that matches the seat. Overall it looks like it came on the car while protecting my valuable brain.
aluminum bits: $100
upholstery: $250
cranial security: priceless 
Mark
Last edited by computerworks; 10-22-2010 at 06:28 PM..
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10-22-2010, 06:28 PM
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Senior Club Cobra Member
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Join Date: Mar 2001
Location: Northport,
NY
Cobra Make, Engine: Kirkham, KMP178 / '66 GT350H, 4-speed
Posts: 10,362
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Not Ranked
Mark... I put the images into your post.
ron
ClubCobra Moderator
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10-23-2010, 09:26 AM
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CC Member
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Join Date: Dec 2009
Location: San Carlos, Carmel,
CA
Cobra Make, Engine: Kirkham #625 427S/C, 468 ci Al block, 615 HP
Posts: 100
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Not Ranked
Thanks, Ron
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10-23-2010, 04:55 PM
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Senior Club Cobra Member
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Join Date: Feb 2007
Cobra Make, Engine: KMP 539, a Ton of Aluminum
Posts: 9,592
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Not Ranked
Mark,
Very nice job. Very professional looking.
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10-23-2010, 06:40 PM
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CC Member
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Join Date: Oct 2009
Cobra Make, Engine:
Posts: 607
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Not Ranked
Go
STupid Question .....Isn't period correct called whip lash LOL ? no really.... some one got a pic ?
SDR
________
Buy digital scale
Last edited by somedayaurora; 02-21-2011 at 05:41 PM..
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10-23-2010, 06:46 PM
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CC Member
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Join Date: Oct 2010
Cobra Make, Engine: Superformance
Posts: 663
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Not Ranked
Definitely a clean install.
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10-23-2010, 07:41 PM
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Full Blown Member
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Join Date: Sep 2008
Cobra Make, Engine: KMP 427 S/C, Twin Paxton 511 FE
Posts: 2,594
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Not Ranked
That looks excellent!
You should consider making more than one.
You might have a few takers. 
rodneym |
10-24-2010, 07:58 AM
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CC Member
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Join Date: May 2009
Posts: 237
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Not Ranked
Quote:
Originally Posted by rodneym
That looks excellent!
You should consider making more than one.
You might have a few takers.
rodneym |
Very well done - sign me up for one, thanks
__________________
BDR 602/Roush 427/EFI 8 stack/T-56 Magnum/540whp+750Nm (sold  )
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10-24-2010, 11:39 AM
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CC Member
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Join Date: Dec 2009
Location: San Carlos, Carmel,
CA
Cobra Make, Engine: Kirkham #625 427S/C, 468 ci Al block, 615 HP
Posts: 100
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Not Ranked
I don't think I have the time to make more of these but I can streamline the process for others.
The split aluminum clamp:
Jegs P/N H3R BMR01P
The aluminum stock I got from Speedy Metals
www.speedymetals.com
They are great to deal with and very inexpensive.
The crossbar and standoffs are .75" solid extrusions that I polished.
cross bar is 9.3125" long and the standoffs are 1.125"
To securely attach the headrest plate I made .175" deep hexagonal recesses to trap the nut and then secured by riveting .04" 6061 sheet over the nuts. The headrest is 12" wide and 6" tall, with the curvature scaled from the seat shape. The headrest is attached offset .75" away from center due to the central position position of the rollbar. I tried a number of approaches in my mockups starting with much smaller initial headrest widths but the best balance of aesthetics and protection was to make the headrest match the center to center dimensions of the rollbar and then offset it.
Upholstery is the biggest barrier to "mass" production as it is critical that the hide match the seat, and every hide is different. I left my passenger seat at the upholstery shop so they could match hide, piping, etc exactly. I used Sid's in Mountain View.
Mark
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10-25-2010, 03:46 PM
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Full Blown Member
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Join Date: Sep 2008
Cobra Make, Engine: KMP 427 S/C, Twin Paxton 511 FE
Posts: 2,594
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Not Ranked
Awesome last post, Mark Thompson!
It would be great to get a collection of 'do-it-yourself' upgrades we could do to our Cobras, suppliers and all. How to make spats, billboard painting, etc. We know they're searchable in the forum but a convenient place would be cool, too. 
rodneym |
12-09-2011, 03:08 PM
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CC Member
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Join Date: Apr 2011
Location: Greenville,
sc
Cobra Make, Engine: Factory Five #6958
Posts: 17
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Not Ranked
Headrest
I built and installed the headrest as you designed them on my Factory Five 2 inch roll bars.The parts list you gave really helped and and made the project easy and fast.
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12-09-2011, 04:06 PM
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CC Member
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Join Date: Apr 2011
Posts: 1,092
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Not Ranked
Mark, outstanding job doing yours and thanks for sharing the "how to".
I intend to a set just as described, maybe go round headrest but the process will be the same.
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12-10-2011, 07:16 PM
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CC Member
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Join Date: Dec 2009
Location: San Carlos, Carmel,
CA
Cobra Make, Engine: Kirkham #625 427S/C, 468 ci Al block, 615 HP
Posts: 100
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Not Ranked
I am glad you found this useful. I was surprised when I was putting the Kirkham together that there was little available information or products to support a good safety solution that looked good. KMP 625 now has 1100 miles and I have enjoyed every one.
Mark
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12-10-2011, 07:26 PM
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Senior Club Cobra Member
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Join Date: Jan 2005
Location: saratoga,
ca
Cobra Make, Engine: Kirkham #185, Shelby Alloy 482; sold
Posts: 1,190
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Not Ranked
Nice job, Mark. For additional safety, you might want to consider moving your belt attachment below the cowl (lower than your shoulders) so they can hold your shoulders down, not just back.
__________________
Dave
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04-01-2014, 04:58 AM
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CC Member
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Join Date: Apr 2008
Location: Near Chichester, Sussex by the sea......,
UK
Cobra Make, Engine: Crendon 427 S/C 428 FE+toploader
Posts: 668
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Not Ranked
Quote:
Originally Posted by 4pipes
Nice job, Mark. For additional safety, you might want to consider moving your belt attachment below the cowl (lower than your shoulders) so they can hold your shoulders down, not just back.
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I would guess that risks spinal compression in an accident.
My understanding is that belts should ideally be placed level or no more than a few inches below the shoulder, although this is rarely achieved in a cobra.
Are Floor Mount Harness Really that dangerous? - Ford Muscle Forums : Ford Muscle Cars Tech Forum |
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