Originally Posted by Rob Edwards

Probably something to the effect that F1 clutch shafts don't have to last very long, and those motors don't make **** for torque, so they' don't _need_ to be strong.

Anderson stop by with more of his '08 F1 car, or have you been bitten by that bug too?

Originally Posted by SeanR

I keep watching Mark post those bits and am expecting him to have a fully functional car next year. Amazing hardware.

Originally Posted by GregBBRD

I didn't say anything personal.....anywhere.

Here's something personal....you seem to "go down roads" that are pure imagination...which is a very interesting thing for an engineer to do.

More personal stuff....another observation, on my part....you do tend to exaggerate things.

First, my shaft was too hard....now because I stated that it is slightly softer that the stock shaft....you are barking up that tree. It's one or two points softer on the "C" scale than the stock shaft....which is where 300M should be. Are you seriously claiming that one or two points softer is a significant amount and is going to cause problems?

Seriously is this amount softer worth even talking about? Is that a significant amount that is going to cause instant spline wear? Do you even know how hard the splines are inside the clutch disc?

You "claim" to be the engineer.....be a logical engineer and answer that stuff, first, before coming off like this shaft is a POS!

I asked what your problem with the shaft is....I asked if you, if from a fricking picture, you can say that the factory shaft is better than my shaft?

You seem to be all wigged out because the splines are cut....let me point out that splines have been cut since the very beginning of spline making....not rolled! Seems like all those billions of cut splines worked pretty damn well for a long, long time.....in some really heavy duty applications. I've pointed out that severe duty axles in extremely abusive off road cars have cut splines....you ignored that. Huge ships that make millions of foot lbs. of torque roam the oceans with cut splines. There's literally millions of examples.

And because rolled splines are cheaper to do....in large volumes (like in mass produced vehicles)....you seem to saying that cut splines are just junk.

Let's get beyond this and be specific.

You, looking at a picture, have very little real information. You claim to be an engineer. Do you do your engineering of the pieces you are checking, from pictures, at work?

Hell, you could sit at home and do that, if that is the case....no point in going out into the cold, driving through the snow, to get to work, if that is the case.

Yes, there is no "long term" testing. Are you telling this Forum that your plant has machines that do long term testing on every shaft you guys make, in real world applications?

Hell no!

You guys look at the dimensions, the heat treating,,,,,all of the engineering that went into a shaft and draw some conclusions from that information....just like I'm doing!

And finally, if you really respect what I do....like you are saying.....you'd look back and see that I stand behind everything I've ever made or do!

I've spent a major portion of my life redoing other people's ****. I've redone almost as many engines as I've done form scratch.....I've redone more 928 belt jobs than I've ever started, from scratch! I redo transmissions that someone has had apart, with very low miles, because they don't work properly.....by the dozens.

You don't have to be concerned about me making crap that I won't stand behind....there's another guy out there, already doing enough of that, for the 928 world!

Originally Posted by GregBBRD

I'll tell you what....let's end this bull**** about my shaft being "inferior" because it has cut splines, instead of rolled splines.....

Formula 1 clutch shaft....multimillion dollar effort....no corners cut....anywhere:


Now, what was your point, exactly?

Originally Posted by 69gaugeman

To be clear, we have no idea what power it will handle. We have a best guess, and some anecdotal evidence from other similar (but not the same) applications, but we have no proof that it is stronger than the factory one.

Originally Posted by OBehave

Nor do we have proof that it is not.

Originally Posted by OBehave

Nor do we have proof that it is not.

Originally Posted by GregBBRD

OK. I officially give up.

Here's a review of what you have said:

After a year of figuring this all out, building a shaft out of a far superior material, improving on the original design, having custom tooling made to cut it, having them made, heat treating them, stress relieving them, grinding them, polishing them, and personally doing quality control on these shafts (I rejected 30% of them, for one reason or another).....I'm the one throwing out bull****.

You might be some sort of an engineer (which I sincerely doubt), but I've yet to hear anything logical.....nothing specific about what is wrong, just crap you are throwing out. All the engineers that I know do not do things like this....they tend to be exact and very factual about what they say....

First, the problem is that it is cut, not rolled.

Then it is to hard.

Then it is too soft.

Then it's not smooth enough.

Now it has nothing to do with any other clutch shaft ever made.

And all of that, without any data....just what you think you see in a couple of pictures.

Oh yeah, that's good, solid engineering.....that makes total sense!

You've stated no facts, no data to support anything.....while I've given out data about material, heat treating, etc.

And I'm the one throwing out bull****.....

Are you serious?

I've got more to do than "play" with you.....you need not post here, on this thread, anymore. Go away!

Because, like everyone else here, I'm completely going to completely ignore you.

Because right now, you'd have to go back and redo what you've said....to just bring yourself up to "idiot" status!