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 1Likes
09-03-2007, 04:16 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
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09-03-2007, 04:18 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 hub bolt has to be perfectly clean as well! Just cleaning one side does not do much good.
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09-03-2007, 04:21 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
Sandwich then takes a HARDENED structural washer and bores the center out to 1 inch to go over the shoulder on the hub washer. You have to use carbide tooling to cut the washer. The washer will just laugh at high speed steel.
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09-03-2007, 04:23 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
We like red loctite. I think they call it red because you will see red if you ever have to take it off! It sticks like mad. Maybe they call it red so you don't have to see red when your parts fall off if you forgot to use it.
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09-03-2007, 04:24 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
Next,
Press the drive flange on. Put the new, hardened washer on the bolt and put in the hub bolt. Leave the stupid "lock tab thingy" OUT! Put it on the wall so you can impress your friends with your cool original Cobra parts.
Last edited by David Kirkham; 09-05-2007 at 08:30 AM..
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09-03-2007, 04:26 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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Torque to 225 foot pounds.
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09-03-2007, 04:29 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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Next bolt on the caliper with those special, cool bolts. Don't forget the washers!!! And, if you are doing the entire car, don't get the front bolts mixed up with the rear bolts. THEY ARE NOT THE SAME!!!
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09-03-2007, 04:31 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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Then, show people you care by making a nice looking job of your safety wire. We use 0.030 inch stainless safety wire. Notice the safety wire is run so that it will not allow the bolt to loosen. Also, notice the end of the safety wire. Sandwich was nice to the next guy. He curled the ends of the wire so whoever had to take the caliper off next didn't get 0.030 inch holes in his fingers.
Last edited by David Kirkham; 09-05-2007 at 08:31 AM..
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09-03-2007, 04:34 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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Done!
Now we are going to show you some very interesting things in metallurgy on the front end.
But it will have to wait until tomorrow. I am going home right now!
David
OK, just a sneak peek.
Our alarm just went off on our computer controlled heat treating oven. By the time I got back there the temperature was 867 degrees--on its way down from 900.
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09-03-2007, 04:37 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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And here's a peek inside. CAREFUL!!! Those parts were just soaked 2 hours at 900 degrees and they are HOT!!!
Who knows what parts they are seeing inside? First correct person who names ALL of the parts that are in the oven gets a prize! 
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09-03-2007, 04:39 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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Bonus prize...
What alloy, heat treat spec, and WHY?
David
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09-03-2007, 04:43 PM
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CC Member
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Join Date: Jul 2005
Location: Powder Springs,
GA
Cobra Make, Engine: ERA FIA 2008/351W/TOP-LOADER
Posts: 526
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Front spindle shafts and rear drive knuckles... Couldn't answer on the alloy? Heat treated for maximum hardness and strength.
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09-03-2007, 04:48 PM
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CC Member
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Join Date: Jul 2005
Location: Powder Springs,
GA
Cobra Make, Engine: ERA FIA 2008/351W/TOP-LOADER
Posts: 526
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Front Stub axle- Front hubs and rear drive hubs. Did I win??
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09-03-2007, 05:07 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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FIA-ERA
I am not sure what a rear drive knuckle is?
You are right, however on your next post. There is a rear hub, front hub, and a front axle.
You win the first question.
Bonus question?
Why do we have a front hub AND a front axle in the oven?
Still open--alloy and heat treat specs????
David
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09-03-2007, 05:26 PM
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CC Member
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Join Date: Feb 2006
Location: Thousand Oaks,
CA
Cobra Make, Engine: Classic Roadster
Posts: 1,367
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Not Ranked
Because you don't want a runny yolk? Good thread! Thanks for taking the time out to educate us.
John
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09-03-2007, 05:39 PM
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CC Member
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Join Date: Feb 1999
Location: Lexington,KY,
Posts: 513
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David,
This is very interesting as my wife owns a kiln that looks very much like the one in your picture.
Now I'm wondering how I can have some fun heathing up car parts. I have no idea how heating something up would benefit me, but it seems like a waste to let an opportunity like this pass by.
Any ideas, suggestions?
__________________
Roger
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09-03-2007, 06:28 PM
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Senile Club Cobra Member
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Join Date: Feb 2001
Location: Buffalo, NY USA,
NY
Cobra Make, Engine: Superformance
Posts: 4,527
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Not Ranked
Quote:
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Originally Posted by David Kirkham
Mark IV,
I am a great fan of Colin Chapman. The more time I spend at the track the more I admire him. Lighter cars are much easier (and funner) to drive quickly. If, however, he was a fan of the upper control arm and the 1/2 shaft being the same piece, then I would strongly disagree with him.
David
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Yes,
When "Chunky" was around in the early sixties, the halfshaft as control arm was "state of the art" but now seems crude.
"Adding lightness" was Chapmans mantra............
Of course AC used SLA cause the car they copied had it....otherwise, we might all have a Corvette type rear suspensin! |
09-03-2007, 07:44 PM
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CC Member
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Join Date: Jul 2005
Location: Powder Springs,
GA
Cobra Make, Engine: ERA FIA 2008/351W/TOP-LOADER
Posts: 526
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Not Ranked
David, Great post!! I always enjoyed books with pictures. I would think the front axles are matched with the hubs and keeping them together insures they get treated to the same temperatures as not to expand or contract differently? It seems there could be different variations in the metal strength and finished product if done separately? I'm not an engineer but I do like the late night questions. Thanks for your contributions!! Matt.
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09-03-2007, 08:06 PM
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CC Member
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Join Date: Jan 2001
Location: Fairfax Station,
VA
Cobra Make, Engine: Kirkham 427 & 289 (KMP 090 & KMPS 040) and need a Kirkham GT-40
Posts: 39
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Not Ranked
David,
The front hubs and axles are placed in the oven at the same time to prevent delaying the next batch of chocolate chip cookies at snack time. Did I win?
Robert in Virginia  |
09-03-2007, 10:02 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
Matt,
No...good guess, however. Are you sure those axles are "matched" to those hubs???
Look back through my post (including this one) and all the hints are there.
John,
At that temperature the yolk would definitely NOT be runny...
rbray,
The kilns may be VERY similar...we just tweaked ours to work like we needed it to with special thermocouples.
Robert,
900 degrees is a little hot for cookies. As a matter of fact, I think it would hard to be around that temperature as it would precipitate a lot of sweating...
David
Last edited by David Kirkham; 09-03-2007 at 10:05 PM..
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