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 2Likes
02-17-2008, 05:57 PM
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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
John,
Yes, I love that phrase. It is not mine. I first heard it from a friend that plays the piano on what she did when faced with a new, exhausting piece.
KM480,
Yes, we could put the chassis under a Coupe or a Lemans hard top car. But, right now we are still in the artistic phase and really have no idea how much this thing even costs. Like I said, we must have over 2000 hours in chassis engineering alone (not counting ANY CNC programming or machining).
We will see what the future brings. As for now, the customer is extremely happy with the car and I am relieved!
David
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02-18-2008, 05:37 PM
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CC Member
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Join Date: Dec 2001
Location: San Diego,
CA
Cobra Make, Engine:
Posts: 2,979
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Not Ranked
Will the birdcage for the body be aluminum as well? That should be fun.
__________________
Remember, It's never too early to start beefing up your obituary.
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02-18-2008, 05:44 PM
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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
Quote:
Originally Posted by xlr8or
Will the birdcage for the body be aluminum as well? That should be fun.
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There is no reason why it can't be. Frankly, we are not that far along yet. The weight savings is only 10 pounds or so and the stiffness goes way down so it gets very hard to wrap the aluminum.
David
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02-18-2008, 06:35 PM
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Abnormal CC Member
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Join Date: Jan 2005
Location: Pottstown (East Coventry),
PA
Cobra Make, Engine: Don't think I'll be getting a Cobra for a long time... Do have '94 RX-7 R2.
Posts: 2,334
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Not Ranked
Is this car going to have one of your billet FE blocks that you showed as a prototype in wood last year?
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02-18-2008, 09:39 PM
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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
Quote:
Originally Posted by 1ntCobra
Is this car going to have one of your billet FE blocks that you showed as a prototype in wood last year?
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Yes, this is the car that the billet block was originally built for. We will get back on the block as soon as we get a little further down the road with the chassis.
David
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02-25-2008, 05:19 PM
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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 are the pics I promised.
This is a shot of the rear of the car with the newly minted trunk structure.
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02-25-2008, 05:21 PM
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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 another shot
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02-25-2008, 05:22 PM
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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 is the front of the car--looking back.
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02-25-2008, 06:32 PM
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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
Overall view of the rear trunk area.
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02-25-2008, 06:35 PM
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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 another overall shot of the rear of the car.
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02-25-2008, 06:37 PM
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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
In this shot you can see the bolt holes for the gas tank supports and
the rear jack hooks.
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02-25-2008, 06:44 PM
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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 was a hard shot to take and show you what I was trying to convey. If you look closely at this part, (it is the furthest back part on the trunk with the round holes in it, you can see the billet aluminum is machined in a curve. This curve follows the curve of the lower part of the trunk on the body. This is where the body actually mounts to the chassis. As you can see, the programming has been extremely challenging--but worth it. It is nice to have so many people come by and be amazed at the work. It's very kind of you guys to say nice things about the chassis here too on CC. It is really automotive sculpture. I hope you all like it.
I will post more pics as we keep making the chassis.
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02-25-2008, 07:06 PM
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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
Now we are thinking about how to make the parts that go around the rear wheels. Because an original Cobra chassis has a 90 inch wheel base we were constrained with this chassis to have a 90 inch wheel base as well. One thing I can tell you all for sure is a 90 inch wheel base is TERRIBLE to engineer around. There is simply no room to carry the loads from the rear wheels to the front wheels. The load path gets chopped up around the rear wheel well panel by the driver's back. The driver is actually sitting BEHIND the front of the rear wheel. As such, it is an engineering trick to carry the loads efficiently and keep the chassis stiff and light.
I will show you pictures of our solution as soon as we finish them. Let's just say the block we start with is about 100 pounds and ends up being around 5 when we are done! I don't have the exact weights, but I will post them when we get them. It is an EXPENSIVE solution, but it is really the only solution that will work.
David
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02-25-2008, 07:27 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
Pretty f'ing cool.
Ti fasteners? Are the Wilwoods heavy? The frame looks so light that it makes other components stand out.
__________________
Lew
I'm no expert. 
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02-18-2008, 07:23 PM
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CC Member
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Join Date: Jan 2005
Location: Hillsboro,
OR
Cobra Make, Engine: Scratch built CSX style frame, Carbon fiber body, 393 Stroker, T-bird IRS, T5
Posts: 1,623
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Not Ranked
What? No billet roll bars?  |
02-18-2008, 09:41 PM
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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
Quote:
Originally Posted by Three Peaks
What? No billet roll bars? |
We actually thought about them, but when we did the calcs they ended up being too heavy. So, for this car they will be made out of stainless. Interestingly, we made the car with provisions for roll bars on both sides.
David
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02-18-2008, 10:22 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
What are the hubs made out of? They look tres exotique!! Is that something that could be fitted to a standard KMS (assuming that MAGNESIUM wheels were available to maximize unsprung weight)?
__________________
Lew
I'm no expert.
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02-18-2008, 10:45 PM
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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 hubs are made from 17-4 stainless--extremely strong and very corrosion resistant. All of our current hubs are made from 17-4 as I hate rust.
What are you doing up so late? Wife kick you out of bed and send you to the couch?
David
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02-18-2008, 11:27 PM
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CC Member
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Join Date: Nov 1999
Location: Niederbipp ( BE ) / Switzerland,
BE
Cobra Make, Engine: ERA 427 SC # 571, 472 Shelby aluminum "stroker " CSX # 299 from Gessford, 48 IDA Weber carburetors from Jim Inglese
Posts: 397
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Not Ranked
David
Congratulations, what wonderful craftsman art.
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02-19-2008, 05:20 PM
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Senior Club Cobra Member
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Join Date: Jun 2005
Location: Scottsdale,
az
Cobra Make, Engine: Bought an Exact carbon car in TX. Bought a 427 sideoiler with 630 HP
Posts: 1,714
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Not Ranked
A friend and old race engineer's favorite saying was "we need to add lightness".
One of my favorite sayings. A new thread should should be started.
John
__________________
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The average fighter pilot, despite the sometimes swaggering exterior, is very much capable of such feelings as love, affection, intimacy and caring. These feelings just don't involve anybody else.
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