[DeTomaso] BRAKE HELP NEEDED

michael@michaelshortt.com michaelsavga at gmail.com
Thu Jun 14 17:38:59 EDT 2012


>From Google.


Good question, I never thought about the firewall moving.


You may think that the person who designed your
brake<http://auto.howstuffworks.com/auto-parts/brakes/brake-types/brake.htm>
lines
was crazy, but all of those bends and loops have a purpose: They add
flexibility.

Cars and trucks bend and flex as you drive. Many trucks have a frame that
supports the body. The body is attached to the frame by rubber mounts, so
there can be a lot of motion between the body and the frame. The master
cylinder<http://auto.howstuffworks.com/auto-parts/brakes/brake-types/master-brake.htm>
is
attached to the body while some of the other brake components are attached
to the frame. Also, when you step on the brake pedal, you flex the firewall
of your car, moving the master cylinder but not the other components in the
brakes.

A car is not always built with perfect accuracy. On one car the distance
from the master cylinder to theanti-lock
brake<http://auto.howstuffworks.com/auto-parts/brakes/brake-types/anti-lock-brake.htm>
system
pump will be slightly different from that on another. The extra flexibility
added to the brake lines allows cars to be assembled even though they are
slightly different from one another.

If the lines were short and straight, the motion of the car would
eventually crack the brake lines; the continual flexing would fatigue the
metal and eventually break it, just the way a spoon bent back and forth
repeatedly will eventually break. By forming the brake line into a coil,
the flexing in any one section is very small, and so puts almost no strain
on the line.


Michael Shortt




On Thu, Jun 14, 2012 at 4:52 PM, Will Kooiman <will.kooiman at gmail.com>wrote:

> Would it really move that much?
>
> I'm guessing so, otherwise the OEMs wouldn't do it.
>
> On Jun 14, 2012, at 3:49 PM, Mikael wrote:
>
> > Loops are made so that there's more flexibility towards the parts moving
> > around, reduces the risk of metal fatigue
> >
> > Mikael
> >
> >
> > -----Oprindelig meddelelse-----
> > Fra: Will Kooiman [mailto:will.kooiman at gmail.com]
> > Sendt: 14. juni 2012 22:37
> > Til: MikeLDrew at aol.com
> > Cc: mikael_hass at mail.tele.dk; clewis at dmn.net; detomaso at realbig.com
> > Emne: Re: [DeTomaso] BRAKE HELP NEEDED
> >
> > So, why do many cars have loops in the hard lines?
> >
> > My 93 Mustang had them at the master.
> >
> > On Jun 14, 2012, at 10:24 AM, MikeLDrew at aol.com wrote:
> >
> >>
> >> In a message dated 6/14/12 4 19 57, mikael_hass at mail.tele.dk writes:
> >>
> >>
> >>> Chris, FYI I have less vacuum than you have at idle, and no braking
> >>> problems (all new parts from Dennis Quella), so I don't think it's a
> >>> vacuum issue.
> >>>
> >>>
> >>
> >> Well, I suspect it *is* a vacuum issue, but not the simple kind (i.e.
> >> not the fact that the engine doesn't make enough vacuum).
> >>
> >> All the vacuum in the world won't help a bad booster.   And your
> symptoms
> >> sound like a bad booster to me.   You've already got one gimmick piled
> on
> > top
> >> of another, but the fundamentals need to be right too.
> >>
> >> I know Dennis Quella sells rebuilt boosters for a rather hefty price,
> with
> >
> >> a core charge on top of that.   Others here have reported great luck
> > having
> >> their boosters rebuilt by specialists for quite a bit less (Dennis is
> >> undoubtedly sending his out to one of those guys and paying the same
> >> rate you would, then marking them up, which is not an unreasonable thing
> > to do).
> >>
> >> I'd definitely give that a try.
> >>
> >> Mike (who has mushy brakes due to inexplicable loops that were put
> >> into his hard lines when the car was restored--new hard lines are in a
> >> box, waiting for installation--and they might be there quite awhile!)
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-- 







Michael L. Shortt
Savannah, Georgia
www.michaelshortt.com
michael at michaelshortt.com
912-232-9390


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