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



--- 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
>
Martin,
specs on creep for the new bars, (Manufacturer's has requested I not reveal process any more than I have, I'm to close to process as it is.) thanks, answer is Longer than Originals,
since originals were 17-4 Stainless alloy you only get what ever the stress point is out of a stainless mix alloy say 200 ksi (=200,000 lbs) where as with the alloy I had used you get 3-4% more per 15 degrees of pre-stress say is 200ksi = 245ksi (=245,000 lbs.).

interested in the details of the splines "Spline's" are a process called Broaching, the original bars were long splined broaching, which in the day was the best. well since I've been working on people's torsion bars over the years people have over torqued the bars to compensate the strut being week or over torqued the bar & the roof support was broke loose from the fiberglass shell, & over torque (excessive stress) on these bars are not good period you can break allot of things along with the bar & personal injury! this Broaching I had used is a rolled broaching which will hold up to a full 180 degree rotation of bar which we should never see done, again My Specs for long term use & reliability. 
So what I did was look into 3 different broaching & see which held on tighter yet was easily usable for owner's to install (since I do these by myself they are very easy to work with & dependable grip). 

the wrong sized Allen key I had the Allen Key Insert made to exact 
3/8" New Socket Allen head for the purpose that anyone can acquire a 1/2" Drive Socket at any auto parts store. (Please Note: I do not advise installing any torsion bar by anyone other than your local trained & qualified Delorean Vendor's). NO more swelling from stretched out holes or twisted broaching. (Splines).

Are they steel or stainless steel? As I stated above these are an alloy mix not stainless since The bar would have to be twice the size in the center to match my specifications & more $$$ to produce about $200.00 more in price. (impractical) the Powder coating is on these bar to protect against weather only!!!!!!!!! see James!!! a scratch would also very noticeable & a stress crack would be revealed as well since the only time the powder coating should separate from the bar!!! this is just a coating that helps the bars last from elements. Great knowledgeable questions thanks!! 

I don't understand what your asking about bracket? sorry
hope this helps the community with allot of questions. I know my personal & talk emails have been full & I try to answer as many as I can, sorry if I haven't got to yours yet. I see the new warranty info is up now as well.
Thanks again,
Lawrence 





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