Date: Fri, 25 Jul 1997 21:21:43 -0700
From: Justin Wagner <jmwagner@greenheart.com>
Organization: Justin Ltd.
To: "Steve L. Toth" <ybullet@flash.net>
Subject: Re: To Justin Wagner-TR6 trailing arm repair
References: <v01530505afff225d17db@[209.30.8.104]>
Content-Transfer-Encoding: 7bit
Steve L. Toth wrote:
>
> Justin wrote and I replied:
>
> >> Justin,
> >>
> >> Yes, all should be replaced. If not, those studs that haven't been
> >> replaced will be stressed. I plan on replacing all 12. (6 per side).
> >
> >
> >While I appreciate your reply... could you sorta back that with with an
> >explanation of your experience or training, etc...
>
> Yes I can. I'm a degreed Mechanical Engineer with over 13 years
> experience and have been a motorhead since I rebulit a 3-1/2 hp Briggs &
> Stratton lawn mover engine at the tender age of 9. I would consider that a
> bit of experience and training, wouldn't you?
> >
> >Your response doesn't really address the issue... if the orginal stud is
> >still firmly in place... how would it be more "stressed" just because
> >you replaced a couple damaged ones?
>
> They sheared out to begin with, didn't they? Take into consideration
> that I have tons of horsepower and very wide tires on the car. All of this
> contributes to the problem. I think that this _does_ address the issue.
>
> You can replace whatever you like. It's obvious to most people that it
> would make sense to replace them all instead of one or two.
> >
> >If steel inserts are so good... should EVERYONE with a car that has some
> >aluminum suspension pieces... should they remove studs and put in the
> >inserts? And if this is the case... was this NOT done by the relative
> >factories? simply because it would be more expensive?
>
> I feel that if you will be autocrossing or racing your vehicle, these
> replacements would be a good idea, not to mention a safety factor.
>
> The Engineers and Designers of these cars designed for a much thinner tire
> and not for the higher output engines. According to their 30 year old (key
> words) calculations, the studs were the sufficient sizes for the forces
> acting upon them. Even today, if you modify an automobile engine and
> suspension, you will need to upgrade with aftermarket products.
>
> >I want to undertand the engineering factors involved with this procedure.
>
> I can understand that you do. I will not sit here and type in the
> formulas and calculations necessary to prove my point. Some things are
> derived from common sense.
>
> You can install these inserts or not, I really don't care. I will be
> installing them on my car. They are approved Military Standard products
> used on all kinds of Military aircraft and I feel that they're just fine
> for me too.
>
> Thanks for your time.
>
> Steve
Hi Steve...
It appears that you totally misunderstood my questions...
I was not attacking your integrity... BECAUSE I don't know you... I
just wanted to know that the response was not just some weekend Triumph
buff's idea of what was correct...
Your original post did not make clear to me WHY all should be
replaced... and what made the inserts better than the original threads.
I just wanted to thorougly understand the dynamics involved...
Like I said in another post... you don't really hear of people putting
inserts into every hold in the engine, just because one head stud
stripped... so it wasn't clear to me where one draws the line...
"You can install these inserts or not, I really don't care." This just
sounded a bit like you were angry or something. Once more... I just
wanted to understand.
" I'm a degreed Mechanical Engineer with over 13 years
> experience and have been a motorhead since I rebulit a 3-1/2 hp Briggs &
> Stratton lawn mover engine at the tender age of 9."
The "mechanical engineer" part is key to me... It is your kind of
educational background that I wanted to hear from when I started my part
of the thread. The "motorhead" part is okay... but I was climbing
around my brother's V8's around then too... and restored my first car
when I was 15... this experience leads me to believe replacing all with
inserts is a good idea... but I wanted to hear from an engineer or
someone from the aerospace industry to back the idea.
"I can understand that you do. I will not sit here and type in the
> formulas and calculations necessary to prove my point. Some things are
> derived from common sense." Sorry I put you on the defensive.
Anyways, Steve... maybe re-read my original thread under a new
light... and see that I was just seeking knowledge... I simply asked
you to qualify your response... and to clarify the areas that were not
clear to me. I think, upon a second read... you'd realize that I did
not intend to insult you.
Thanks for the information.
Justin
|