"Matthew S. Whiting" wrote:
Bill Putney wrote:
> "Matthew S. Whiting" wrote:
>> ...Like people who claim that synthetic oil gives them a 20% increase in
>>gas mileage (typically based on checking one tank of gas!), or that
>>Splitfire spark plugs give them 10% more horsepower, etc. The mind is a
>>powerful device...
>>
>>Matt
>
>
> Oh yes - the ol' placebo effect.
>
...
I'm not a gun expert, but I think I understand enough to say that you are wrong on this point *because* the difference that they're pointing out is *not* absolute accuracy per-se, but *repeatability* - big difference related to what they are claiming. IOW, if absolute accruacy is crap, but repeatability is improved, it will show up as the pattern of holes in the target being off center, but in a much tighter cluster for a good/consistent shooter. In that regard absolute accuracy can be compensated for and/or adjusted out with adjustments of the sites - so that's would not be important and therefore not measured, or it would be adjusted out before the start of the tests - in any case, not a factor.
I think Ted would agree that this could be easily proved by hard mounting the gun (to eliminate the variability of the human shooter), and checking the tightness (not absolute accuracy, again, because that can be adjusted out) of the pattern before and after cryo treatment of the same gun. (And if effects of variation in re-assembly were an issue, to make it double-blind, you have multiple barrels, half treated, half untreated, with the person doing the assembly in random order not knowing which barrels were which, then measure the results as each is assembled and fired.)
For example, let's say the wheel lug nuts were grossly overtorqued and the rotors warped.
Not the case on my car.
The owner takes them off, has them cryo treated and
then turned on a lathe. They are now reinstalled and this time the lug nuts are hand torqued to the proper value. The rotors don't warp again. It was the cryo, right?

Maybe, maybe not, but I'll bet you a steak dinner that the owner credits the cryo in any event.
I undsertand the example, but none of that is the case with my car - no over-torqueing, new rotors used. Yes - maybe the particular sample of Raybestos rotors I used were superb to survive the multiple 3-mile 8 to 10% downhill grades I just took it thru unscathed. Again, you are correct - my anecdotal experience doesn't prove anything scientifically.
It might be interesting if a few of the jeep and minivan owners invested in a little experiment and got new rotors and had them cry-treated to see if their chronic problems "magically" disappeared. (And yes, I know, even that would not be scientific proof of anything - I'm just glad that I didn't allow my health to be wrecked by demanding proof that the herbs worked before trying them on my back).
> BTW - I think the placebo effect is invoked *way* too much in this world
> (usually to protect someone's status when threatened by something new or
> better). MD's were telling me 20 years ago that by 10 years ago, I was
> going to be in a wheel chair and totally incapacitated due to a back
> problem. Thanks to an herbal treatment that I've been using for the
> last 15 years, I am not in a wheel chair and able to work as well as any
> other 52 year-old.
>
> MD's will also tell you you can't fix a congested gall bladder (and thus
> avoiding surgery for gall bladder removal) by using a $5 product from
> the grocery store (known as olive oil), but it's hard to "placebo"
> yourself into crapping 5 or 10 gall stones into the toilet in the ...
Barring out and out lieing, a tighter pattern by an expert competition shooter is fairly convincing. 140 vs. 6 "hooks" for turbo life in tractor pulling is hard to explain away - except of course as Ted says, they were paid off to make the statement. Arnold Plamer apparently believes in it for his line of golf clubs - but I agree that it could be as much a marketing gimmick rather than a true scientifically-based improvement. Would anyone named Arnold be that shallow? 8^)
The above sounds like an Amsoil advertisement.

After using Amsoil in my motorcycle and one car many years ago, I don't believe all of their claims either.
Some things above just don't make logical sense. I can see treating the rotors potentially making the rotors last longer, but I don't see it making the pads last longer.
I've thought about that too - but hardness and finish of one component in a wearing system can certainly affect that without necessarily seriously changing COF - a tribologist would bear that out I think - so I believe the claim is credible.
I've wondered about claims by some on this ng about certain brands or types of pads affecting rotor warping since for a given braking event, watts are watts, and, barring improper lug nut torqueing, watts are what would cause the warping (one possible explanation is that the filming of the pad material onto the rotor surface can be more consistent with one type of pad than with another and so the affect of warping can be seen without true warping) - but I digress...
Unless the short pad life was from rusted
and pitted rotors and the cryo somehow prevents rust, which I doubt.
No - it does not prevent rusting. An engineer at 300 Below told me that when I asked him that question before I had my rotors treated. Plus, I can tell you that the parts of my treated rotors that are not rubbed by the pads are rusting like any other iron rotor would - Oh - wait - I haven't scientifically proved that it's actually rust - there could be some other explanation. But whatever it is, it looks and feels just like rust. 8^) (sorry couldn't resist).
Even if cryo serves an annealing function, which is what most claim from what I've read, that wouldn't increase pad life.
I don't know if you can accurately say that. Again, as an engineer, I can see how changes in molecular and grain structure and other properties could do that without necessarily degrading COF.
If Amsoil as a good as it claimed back in the 70s, everyone would be using it now. Same for cryo. I use synthetic oil and have for 25 years, but my cars don't get magically quieter, I've never seen a measurable fuel mileage improvement (and I keep a log book and calculate every tankful), etc. I use it for one reason only, it is less viscous at low temperatures and my cars crank better in the winter. This is a very noticeable effect. I believe it also gives better high-temp protection, but that isn't a major consideration in PA.
And if the back herbs worked, the medical profession would have adopted it into their protocols. And if olive oil would cause rock-hard gall stones to turn into littel sponges and dump out into the crapper, they would be doing that instead of surgery to remove an organ and charging thousands of dollars and days of recuperation time. 8^)
Science says the bumble bee can't fly, but the poor ignorant bumble bee hasn't gotten the news, and he keeps flying around! 8^)
Seriously - I reiterate that I realize that I haven't proven anything about cryogenic treatment. The option is out there for people to try. The gamble seems to have paid off for me.
Bill Putney
(to reply by e-mail, replace the last letter of the alphabet in my address with "x")
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