It's been 25 years since I last had a TR3, so I can't comment on restrictor
valve, but what that should do is keep your rear brakes from locking before
fronts. Any looseness you can feel by shaking will cause knock back in hard
use!!!
>From: John Cowan <jfcowan@pacbell.net>
>Reply-To: John Cowan <jfcowan@pacbell.net>
>To: Roger Sieling <Rogsie@telesistech.com>, triumphs@autox.team.net,
>vintage-race@autox.team.net
>Subject: Re: TR-3: "knock-back", restrictor valve
>Date: Fri, 27 Jul 2001 16:22:50 -0700
>
>Roger,
> Several years ago we removed the restrictor valve from the brake line
>because the brakes were dragging after the pedal was released. Would the
>fact that this is missing allow "knock back" to happen? The restrictor
>valve was all gunked up. It's cleaned up now, so I could easily replace it
>when I replace the brake fluid, etc.
> One of the bearings seems a very little bit loose when I shake the
>wheel, but not enough to be a problem in normal driving.
> Thanks for the feedback.
>John
>
>
>
>
>At 10:03 AM 7/24/2001, you wrote:
> >Check your front wheel bearings. If they are worn or just losely adjusted
> >you will get a good case of pad "knock-back". This is not at all like
> >brakef ade. Fade is when you have plenty of pedal, but the brakes have
> >gotten so hot the coefficient of friction changes and even though you
>push
> >hard, it will not stop. Do your brakes work OK after your run, after you
> >pump them up? Also if you are really experiencing fade, are the pistons
>in
> >your calipers frozen ands taying in contact with the disc, thereby
> >overheating. Smell the brakes too. If they are hot enough to fade, you
>can
> >smell 'em.
> >
> >Roger
> >
> > >>> John Cowan <jfcowan@pacbell.net> 07/24/01 12:21PM >>>
> >
> > Took the TR-3 out autocrossing for the first time and enjoyed it
>quite a
> >lot. The car handles much better than expected, but the brakes faded
> >outrageously. By the end of a run, the pedal was nearly to the
> >floor. Here's my theory and I woulda ppreciate any comments or
>suggestions.
> >
> >1. The standard shoes and pads I'm using fade quickly, necessitating more
> >force on the pedal: This is the most obvious possibility, but it didn't
> >seem to me I was pressing the pedal very much harder than usual (of
>course,
> >this could be an illusion).
> >
> >2. There is air in the brake lines: Could be. I'mr unning DOT 5 and
> >haven't changed the fluid in several years. On the other hand, under
> >normal driving, I don't need to pump the brakes for them to be effective.
> >
> >3. In any case, metal brake hoses would improve performance, so I
> >will install them and change brake fluid at the same time.
> >
> > Can anyone suggest a source for more effective pads and shoes to use
>on
> >an original '60 TR-3A? (but not *too* race-worthy, since the car is a
> >weekend driver and I don't want to trash the rotors and drums). The big
> >three don't offer anything except standard parts.
> >
> >Thanks.
> >
> > John Cowan
> >
> >
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