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CC Advertisers
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08-18-2010, 06:34 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
Sidepipe vibration isolation
For those of you that have isolated your side pipes from the frame, could you post a picture so I can see some of the isolation methods?
__________________
Dave
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08-18-2010, 07:33 PM
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Average Guy
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Join Date: Sep 2002
Location: Rushville,
IN
Cobra Make, Engine: red Shell Valley, white stripes
Posts: 579
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Not Ranked
I don't have a picture, but I used some rubber bushings normally used on the top stud of a shock absorber on our daily driver. Cheap and effective.
__________________
When I said I wanted to be somebody, I probably should have been more specific...
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08-18-2010, 08:17 PM
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Half-Ass Member
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Join Date: Jun 2005
Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
Posts: 22,000
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Not Ranked
ERA uses a big-ass piece of heavy rubber hanging down to a bracket that is welded on the pipe.
Last edited by patrickt; 11-07-2016 at 02:00 PM..
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08-18-2010, 09:09 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
Thanks, but I was hoping for some responses from Kirkham owners.
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Dave
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08-18-2010, 09:44 PM
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CC Member
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Join Date: May 2001
Location: California,
Ca
Cobra Make, Engine: NAF 289 Slabside Early Comp Car with 289 Webers and all the goodies. Cancelling the efforts of several Priuses
Posts: 6,592
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Not Ranked
Contact Kirkham direct.
__________________
Rick
As you slide down the Banister of Life, may the splinters never be pointing the wrong way 
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08-22-2010, 05:53 PM
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CC Member
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Join Date: May 2009
Cobra Make, Engine:
Posts: 135
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Not Ranked
How much vibration come from this? Is the purpose of this to feel less vobration as a driver or something else?
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08-22-2010, 08:06 PM
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CC Member
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Join Date: May 2001
Location: California,
Ca
Cobra Make, Engine: NAF 289 Slabside Early Comp Car with 289 Webers and all the goodies. Cancelling the efforts of several Priuses
Posts: 6,592
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Not Ranked
The CSX cars used a bracket similar to that in Patricks picture above. The bracket was welded to the pipe and is stable in two planes, fore/aft and vertical shear (supporting the weight). It would slide between 2 tabs that were welded to the chassis and a bolt passed through the 3 pieces with a rubber tubular isolator (like a piece of 3/8' fuel line (with bolt through it) inside a metal tube about an inch long that was welded to the bracket on the pipe. It locates the exhaust pipe and dampens the vibrations and lessens the harmonics created by the exhaust impulses. Very effective.
__________________
Rick
As you slide down the Banister of Life, may the splinters never be pointing the wrong way
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08-22-2010, 08:16 PM
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CC Member
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Join Date: May 2002
Location: Mission Viejo,
CA
Cobra Make, Engine: Kirkham, 427 side oiler
Posts: 225
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Not Ranked
My Kirkham sidepipes have a bracket which is essentially a stand-off welded to the sidepipe that bolts to the frame. It's all factory stuff and designed to work with the car. No rubber bushing. As far a vibration.....the whole car essentialy vibrates with a 600 HP big block!! I would call the Kirkhams to sort out!
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08-22-2010, 09:09 PM
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Senior Club Cobra Member
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Join Date: Feb 2003
Location: sac., ca,
ca
Cobra Make, Engine: owned Kirkham for 11 years
Posts: 1,032
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Not Ranked
Hi Dave,
I remember Morris`thread on his Kirkham #259 over on the Gasholes website goes into a lot of detail for the back mount. I just checked and a good pic is on page 64 of his build site.
Are you coming up to Sears Point for SACC?
Maurice
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08-22-2010, 09:13 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
Thanks, Maurice. I'll be at SAAC35 on Saturday, hope you see you.
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Dave
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08-24-2010, 01:54 AM
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Super Moderator
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Join Date: May 2001
Location: Fresno,
CA
Cobra Make, Engine: KMP 184/482ci Shelby
Posts: 14,445
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Not Ranked
So I go and take pics, and then realize I haven't loaded Photoshop into my new laptop yet. I'll try to get that done tomorrow. Otherwise, you can eyeball it at SAAC.
It's a two-piece affair...one long arm welded to the pipe, and another long arm welded to main frame tube...joined together with a good sized bolt. Allows for fine adjustment of the pipe height and the long length probably provides a certain amount of flex without it being rubbery.
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Jamo
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