Momo Prototipo 1966 steering wheel

[Mark Morrissey]

Thanks very much Doc and you too Richard! I will send you a PM on the buttons --

Huge apologies to Riccardo as I've realized that I have completely highjacked your thread... so sorry!

[Mr9146]

I'm not the only crazy person out there.

Yes you are.

[QWKENF-911]

Let's hear about the horn button..oversize Porsche crest with and w/o the silver rings...
Inquiring minds wants to know..

[ribachio]

Thanks very much Doc and you too Richard! I will send you a PM on the buttons --

Huge apologies to Riccardo as I've realized that I have completely highjacked your thread... so sorry!

No problem Mark You 're always welcome with your great competence!

as soon we 're going to the crazy matter of the hbuttons (and the mistery of the rings:::) introducing by PreS and QWkenf .. for crazy people only

[Reza]

Because its you i will order a back issue, bud. I think the entire circulation in newsstands in australia n singapore have soldout !

But you look the bestest among us in a rasta wig, Mark

Yes you are.

[Reza]

Cold hardening or maybe annealing would have taken care of this Don Moretti only needed to hire a japanese katana-smif

Mark

I am surprised you didn't comment on the stress micro fractures on the first hole on the left hand side(3rd photo of original post)unlike your wheel lots of the early wheels used hard tended to show this I believe they addressed that in the manufacturing process in the later wheels

Raj

[ribachio]

I read such a mycroscopic analysis.. . The wheel have some sign of the time, maybe coming from a hard use for a short time in rally races(early 70's) before coming back to a smooth road handling of a 911coupe. As Varunan says the wheels of that time in racing use suffered sometimes fractures, as the momo prototipo of the early 70's Dino Ferrari 246Gt sometimes broken in a road use also...What you think Mark?

[Mark Morrissey]

I wouldn't characterize it as a 'fracture'. I call it a stress score -- it is extremely common with these old wheels and obviously most visible with one that has black anodizing. It is likely due to a mild impact on an area of the wheel. It doesn't take much of a whack to get the anodizing to flake off in this manner. That being said, you might want to inspect the left spoke for a possible/probable slight bend.

[JCR]

I have an old Monza wheel with the same stress scores, in the same spot. They usually seem to be at the 10 o'clock position.

My theory is, they come from someone trying to push and steer the car at the same time (thus, putting too much forward pressure on the wheel); perhaps while moving the car around inside a garage. The spoke gives a bit too much at this weak spot, and these scores form.

[ribachio]

I have an old Monza wheel with the same stress scores, in the same spot. They usually seem to be at the 10 o'clock position.

My theory is, they come from someone trying to push and steer the car at the same time (thus, putting too much forward pressure on the wheel); perhaps while moving the car around inside a garage. The spoke gives a bit too much at this weak spot, and these scores form.

It's very interesting this ten o'clock theory! JCR Could you post a pic of your Monza wheel? I've one more strong having a 320mm diameter ...