Re: [DML] NEW IMPROVED DRIVER'S TORSION BARS

["twinenginedmc12" <twinenginedmc12@xxxxxxxxxxxxxxxxx>]

Agreed.  It's nice someone has made these.  It was inevitable that somebody would meet the need.  

I respectfully disagree with your statement about springs.  Delorean torsion bars are stressed to a large portion of their yield stress, and are probably subject to a fatigue derating of allowable stress on account of that.  

Have the replacements been tested to 20,000 cycles?  That would be encouraging.  

There's no reason to think that replacements couldn't be at least AS good as OEM, it's great that somebody has done it, and I feel better knowing that a critical part is now more available than before.  

If they are substandard, I'm sure someone will flag it.  Even if they are, they're still worth buying if the alternative is "none", or "prohibitively expensive". 

Rick.





--- In dmcnews@xxxxxxxxxxxxxxx, Martin Gutkowski <martin@...> wrote:
>
> Well, I for one think it's fantastic that someone's taken the time to 
> get these made. I'm no expert on some of the parts I've done, so I go to 
> places with the expertise to make them. Lawrence has done the same, and 
> while he could have got all the answers in advance, he's no doubt keen 
> to get these out on the market and start to get some return on his 
> investment, which on a product like this is undoubtedly considerable. 
> Being powdercoated is an improvement isn't it? The originals can be 
> really quite ugly when the spirals are visible, and they're also 
> unprotected when it comes to cleaning
> 
> People keep asking about the 20,000 test cycles reducing the life of the 
> bar. This is exceedingly unlikely. Springs are designed to work within 
> the yield stress of the material - within that limit it doesn't matter 
> how many times the material is stressed, it won't permanently deform or 
> be affected in any way. If you were to exceed the yield stress, you'd 
> know it immediately!
> 
> However, the reason the original bars deform is due to "creep" which is 
> a very slow deformation over a very long period of time when a material 
> is held under stress. The washers in your taps (fawcets) suffer the same 
> problem. I'd be interested to know the specs on creep for the new bars, 
> and I'm also interested in the details of the splines - more about the 
> bracket than the bar, although anything that makes removal of those 
> things when someone has used the wrong sized allen key is only a good 
> thing, if we can rely on it!
> 
> Are they steel or stainless steel?
> 
> All the best
> 
> Martin
> www.delorean.co.uk
>




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