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 2Likes
06-04-2008, 08:57 AM
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CC Member
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Join Date: Mar 2001
Location: Provo,
Ut
Cobra Make, Engine: Kirkham, 427
Posts: 6,990
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Not Ranked
One of the secrets of the stiffness of the chassis (300% stiffer than an original chassis) is the stressed tunnel. From this shot you can also see we integrated the ebrake handle mounting directly into the tunnel. This saves weight and makes a stiffer part.
Last edited by David Kirkham; 06-04-2008 at 09:03 AM..
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06-04-2008, 09:00 AM
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CC Member
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Join Date: Mar 2001
Location: Provo,
Ut
Cobra Make, Engine: Kirkham, 427
Posts: 6,990
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Not Ranked
The tunnel is 1/2 inch thick aluminum. From this angle you can see we milled away everything we could to lighten up the chassis.
Last edited by David Kirkham; 06-04-2008 at 09:04 AM..
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06-04-2008, 09:04 AM
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CC Member
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Join Date: Mar 2001
Location: Provo,
Ut
Cobra Make, Engine: Kirkham, 427
Posts: 6,990
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Not Ranked
Here is a close up of the milled out tunnel. The tunnel is loaded into the uprights that feed back into the chassis. They didn't line up and so we had to bridge the gap (another work-around). We had to do this because of the wheel base, original space, and original "look" we worked to preserve.
Last edited by David Kirkham; 06-04-2008 at 09:12 AM..
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06-04-2008, 09:12 AM
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CC Member
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Join Date: Mar 2001
Location: Provo,
Ut
Cobra Make, Engine: Kirkham, 427
Posts: 6,990
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Not Ranked
Close up of the ebrake set up.
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06-04-2008, 09:14 AM
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CC Member
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Join Date: Mar 2001
Location: Provo,
Ut
Cobra Make, Engine: Kirkham, 427
Posts: 6,990
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Not Ranked
This shot shows how we tied the tunnel into the rear bulkhead to help carry the loads forward in the chassis. The little bulge you see on the side is for clearance for the pinion flange on the differential! Yes, everything is extremely tight on the car and there is very little room to work with.
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06-04-2008, 09:16 AM
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CC Member
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Join Date: Mar 2001
Location: Provo,
Ut
Cobra Make, Engine: Kirkham, 427
Posts: 6,990
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Not Ranked
This shot shows a little clearer how we had to bridge from the tunnel to the frame rails. We couldn't just splay the tunnel out further as the tunnel would have then intruded into the seats. As it is, you want as much room as possible for the driver and passenger.
Last edited by David Kirkham; 06-04-2008 at 09:18 AM..
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06-04-2008, 09:18 AM
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CC Member
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Join Date: Mar 2001
Location: Provo,
Ut
Cobra Make, Engine: Kirkham, 427
Posts: 6,990
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Not Ranked
Here is a shot of the top of the tunnel.
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06-04-2008, 12:35 PM
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CC Member
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Join Date: Dec 2002
Cobra Make, Engine: KMP
Posts: 790
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Not Ranked
David:
How much do you think the completed car will weigh? It looks beefy in the pictures. I have an idea on how to lose some sprung weight.....
__________________
Lew
I'm no expert. 
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