Million Dollar Skunksworks Kirkham

[Cobra #3170]

Originally Posted by David Kirkham

Welcome to the boards!

Thank you very much for your kind words. I think any bunch of dedicated guys can pull of any thing they want to. I told Larry the car would have "no excuses" and that is how we built it.

We have already transferred much of the technology to our cars. Our cars are now coming delivered with CV 1/2 shafts. Our hubs have the drive pins milled right into them. I imagine we will be driving our rotor hats from the OD of the hub shortly, all in an effort to make our cars as best as we can.

The steering is so expensive to make, we haven't taken the leap to go into production on that part yet, maybe one day. The front and rear suspension are specific to the billet chassis. There is really nothing we can do to move that to our car. We have always stuck with the original chassis and that means compromises. The Aerogel is pretty nasty, dusty, and expensive to work with. I doubt we will be using much more of that. One thing we are seriously considering now is to make the footboxes out of aluminum so we can make them wider and deeper than the original car. We wouldn't change the chassis, however.

We did not protect the aluminum on this project with anodizing or anything else. Almost all of our parts are made from 6061 which is a spectacular alloy. It is rather strong and it is very corrosion resistant. We didn't anodize the parts on the car because anodizing etches the part and removes many of the machining marks. It also leaves the part rather dull.

Our tanks are not anodized either. Many people polish the tank when they get them and anodizing them would make polishing them quite difficult.

I will post on this site if we can find a reasonably priced place to print the book. Anyone with any suggestions, please let me know!

David

David,

Will your new CV half shafts fit an original car with 4 bolt flanges inboard and out board? Whose joints are you using and how much for a pair of complete half shafts?

[David Kirkham]

Originally Posted by Cobra #3170

David,

Will your new CV half shafts fit an original car with 4 bolt flanges inboard and out board? Whose joints are you using and how much for a pair of complete half shafts?

It is no problem to make the 1/2 shafts fit an original car. You will need to change the flanges to a 6 bolt pattern, but that is not a big deal. There is really no way to convert the 4 bolt flange of the original car to the 6 bolt flange of the CV joint.

We are using the Porsche 930 108 mm joints.

The 1/2 shafts are $1500 for the set, including bolts.

David

[Cobra #3170]

Originally Posted by David Kirkham

It is no problem to make the 1/2 shafts fit an original car. You will need to change the flanges to a 6 bolt pattern, but that is not a big deal. There is really no way to convert the 4 bolt flange of the original car to the 6 bolt flange of the CV joint.

We are using the Porsche 930 108 mm joints.

The 1/2 shafts are $1500 for the set, including bolts.

David

David Thank you,
The price is reasonable and those joints are the best. I was going to convert my stub shafts to 30 spline anyway, are the 30 spline shafts made with a 6 bolt flange? I am assuming that you also have a splined outer flange that will fit my hub carrier drive hub that is also 6 bolt? Will the Porsche CV clear the original circular hole in the frame and is there an issue with driving and torquing the CV mounting bolts on car? It is very difficult to get torque on the standard 4 bolt flange because of minimal clearance.

[David Kirkham]

Originally Posted by Cobra #3170

David Thank you,
The price is reasonable and those joints are the best. I was going to convert my stub shafts to 30 spline anyway, are the 30 spline shafts made with a 6 bolt flange? I am assuming that you also have a splined outer flange that will fit my hub carrier drive hub that is also 6 bolt? Will the Porsche CV clear the original circular hole in the frame and is there an issue with driving and torquing the CV mounting bolts on car? It is very difficult to get torque on the standard 4 bolt flange because of minimal clearance.

There is adequate clearance to tighten the bolts and everything clears. Yes, we will supply a 6 bolt flange for your rear upright.

If you are changing to the 30 spline axles, (which I totally recommend!) then we should look into making the axle and the flange in 1 piece for maximum strength out of 17-4. That is the alloy we used on this Billet Chassis Car. Making the flange and axle in 1 piece will also allow us to make the axle as long as possible to reduce the angularity of the CVs. The part is a little more expensive, but it is vastly superior because you don't have to worry about the differential axle nut loosening (there isn't one).

David