Re: [DML] Driver's side torsion bar update

["jrc2905" <jrc2905@xxxxxxx>]

--- In dmcnews@xxxxxxxxxxxxxxx, "Cameron, Peter" <cameron@...> wrote:
>
> I'm always interested in learning, please give me the URL of the 
web site of your metals engineer.
>  
> To me it is not a question of finding someone who does more 
sophisticated welding. Your guy may be the world's best welder. I 
question the advisability of doing any welding at all on a 
cryogenically annealed torsion bar, no matter how much sophistication 
is possessed by the guy that is staring into the blue light.
>  
> I'm not saying Delorean torsion bars are not an issue, but rather 
that I see no simpler and safer way to approach this problem than 
just spending the money and buying something that was designed for 
and is proven to meet the specs of this application, rather than 
trying to re-engineer without a full understanding of the problem. If 
your metals engineer thinks he is dealing with a $40 part, then to me 
it seems pretty obvious that he doesn't understand the problem. 
>  
> I agree that most torsion bars, springs,... are manufactured 
without cryo. Cryo is expensive. Must have been some reason why 
DeLorean chose to go that route. Just because something looks 
identical to a DeLorean bar, doesn't necessarily mean it will perform 
the same.
>  
> It could be that you are right, that people are making too much of 
this, that technology has advanced sufficiently over the past 25 
years to permit making a bar without the cryo process. I know that I 
don't have a complete understanding of the problem. I also know that 
I would have to invest a lot of time, money and thoughtful research 
before I would be confident that I did have a proper understanding, 
and was in a position where I could design and build a torsion bar 
for this application with confidence. And I have designed and built A 
LOT of very sophisticated gear over the course of the past 40 years - 
structural engineering (bridges, buildings,..), design and building 
of heavy construction equipment, sophisticated tooling for major 
manfactures of screw machines and chuckers, helium 3 refrigerators 
that operated a few hundred millikelvin above absolute zero, 
components for superconducting magnets,.... I've managed major R&D 
projects with budgets of tens of millions of dollars. To me this 
torsion bar looks non-trivial.
>  
> I am simply urging caution. The torion bar may not be a suspension 
part. But the door is pretty damn heavy, I would not want to be 
getting in or out of my car when it broke, even with the presence of 
the damping strut to help ease the fall.
>  
> Peter Cameron
> vin 3579
> 
> ________________________________
> 
> From: dmcnews@xxxxxxxxxxxxxxx on behalf of jrc2905
> Sent: Mon 7/30/2007 2:00 PM
> To: dmcnews@xxxxxxxxxxxxxxx
> Subject: Re: [DML] Driver's side torsion bar update
> 
> 
> 
I will post his site after he does my work, I don't want people 
sending him messages right now, he might get distracted. I have sent 
it to a couple of people who agree that if anyone can do it he is the 
one.
I have spoken to a company who will cryogenically treat any repaired 
or new bars I send them. I know it is not the same but it should help 
the repaired bar.




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