[DeTomaso] Wilwood Brakes WTF????

[Scott Bell]

And the aluminum brackets I've seen were 3/8 thick. We make ours out of 1/2
steel. 

This is an area where safety outweighs weight... pun intended...

-----Original Message-----
From: detomaso-bounces at poca.com [mailto:detomaso-bounces at poca.com] On Behalf
Of dave londry
Sent: Monday, April 15, 2013 7:31 PM
To: MikeLDrew at aol.com
Cc: guson at home.se; detomaso at poca.com
Subject: Re: [DeTomaso] Wilwood Brakes WTF????

The basic stiffness with steel will be almost triple that with aluminum.
That **could** certainly push the frequency at which the caliper oscillates
  away from the frequency at which the steering system oscillates.

That's a very loose conjecture, but multi-body system vibration is like 
that.
There may be a mechanical vibrations guy on the forum who actually knows 
something about it??
dave

On 15/04/2013 7:04 PM, MikeLDrew at aol.com wrote:
> In a message dated 4/15/13 11 39 3, kirby.schrader at gmail.com writes:
>
>
>> I have had issues twice with the brakes shaking after hard use on the
>> track, but this always occurred just after I'd put new rotors on.
>> The rotors obviously warped (although some people have told me that
>> doesn't happen) because once I had the rotors turned down after a
>> track weekend, they were fine again and never gave any further
>> problem. It was only the fronts, too.
>>
>>>> I had an interesting talk with Dennis Quella about all this.   He said
> that he had the shaking brakes syndrome on his own car, and worked hard to
> find the cause.
>
> He said that there was an undocumented change on the steering arms, and
> that some of them were more beefy than the others.   The caliper mounts to
the
> back side of the steering arm.   On his car, he had the less-beefy kind;
> once he discovered that, he created a steel gusset and heliarc welded it
in the
> weak point.   But at the same time, he switched from solid-mount rotors to
> fully floating rotors.   The problem was then completely cured, but he
> doesn't know what actually cured it.
>
> On an un unreleated not, Scott mentioned that his caliper mounts are made
> of steel instead of aluminum.   I never realized that PPC's were aluminum.
> Although that's nice for lowering weight, I wonder if it wouldn't be a
> better idea to use steel there?
>
> Mike
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