Good mentioning the mounting bolt difference of the P and PB calipers, Bill.
The shoulder is metric to fit the PB caliper, but the thread is standard. Go
figure.
I have the PB calipers on my TR3.
The PB (metric) calipers do have a 3/16", or perhaps metric equivalent pin.
They also have an improved/sturdier dust boot that doesn't deteriorate from
heat like on the P caliper.
Brad, just drill out the pad holes to 1/4" and be done with it.
I opened the pin holes in my PB calipers to 1/4" and have had to opened the
holes in pads as well.
I have my second set of Carbotech, ( I think X6 compound ) pads in now. I
started with Hawk Blue. The Hawk pads seemed to have a quicker bite, but
didn't last very long and made a lot of dust. They also seemed to be very hard
on the rotors. That could have been related to the aftermarket rotor quality
that I used initially. I've since been using Brembo. The Carbotech/Brembo
setup wears very nice and evenly. I'd like to try the Hawks again with the
Brembo rotors.
BTW, the PB calipers are available new for around $100 each new. That's pretty
inexpensive for such an important part. I purchased another set when I thought
I might be having a problem, but ended up just changing pads. I'm glad to have
a new pair standing by. Then I can rebuild at my leisure.
Dave H.
> On March 7, 2018 at 6:15 PM Brad Eells via Fot <fot at autox.team.net> wrote:
>
> Scott,
>
> Engineer Tim mentioned the 240Z connection. This leads me to believe the
> pads were designed for a Japanese knock off of the original 16P like so many
> other parts of the car. Likely built to a metric size that leads to a
> slightly undersized retaining pin hole.
>
> I am amazed that apparently no one has ever mentioned it to Porterfield...
>
> Thanks,
>
>
> Brad
>
>
> Brad Eells
> Chino CA
> #35 DP 1962 Triumph TR4
> #76 FP 1969 Triumph Spitfire Mk3
> 1965 Triumph TR4A IRS...for the road!
>
>
> On Wed, Mar 7, 2018 at 5:55 PM, Scott Janzen <sjanzen at me.com
> mailto:sjanzen at me.com > wrote:
>
> > > I run 16Ps on my GT6 and have used Hawk, Porterfield and
> my current favorite - something that Ted sells, can?t remember the name. In
> most cases in the past few years, I?ve had to egg out the holes for the 1/4?
> pins with a drill.
> > Mine typically look like the photo of the new one you have on the
> > right. I think the pads are ?shared? with the Datsun 240z and they
> > probably fit fine on that car.
> >
> > On Mar 7, 2018, at 7:21 PM, Brad Eells via Fot <fot at
> > autox.team.net mailto:fot at autox.team.net > wrote:
> > Hello Amici,
> >
> > Porterfield brake pads in the R4-1 compound were recommended to me.
> > I dutifully ordered a set for my Spitfire.
> >
> > I should mention the car has been upgraded to GT6 brake calipers,
> > the venerable Girling 16P. My TR4 and 4A also use the 16P. I have been
> > buying brake pads for these cars for over 35 years.
> >
> > I have had my calipers rebuilt and purchased new retaining pins as
> > well. The Porterfield pads arrived. I found 2 issues. The pad compound
> > shape was not the same as every pad I have previously purchased or what is
> > shown on Porterfield's website. I also found the retaining pin holes in the
> > puck to be too small. The puck itself is the same general dimension as my
> > original Girling Competition pad and does fit in the caliper but I cannot
> > put the pins through the holes.
> >
> > I simply assumed they had sent pads for the later GT6, the Girling
> > 16PB or M16PB that use 3/16" retaining pins.
> >
> > 8 Emails with manager, Wendy and 1 phone call with engineer Tim and
> > we still have a disagreement. I was told they had sold that exact pad "for
> > 25 years" for my application and no one had ever had a problem or
> > complained. When I asked why I couldn't simply have what was shown on their
> > website as the pad for the 16P, I was told that was just a general
> > illustration and not correct for any specific application.
> >
> > They have offered to drill out the retaining pin holes to fit my
> > pins. I am honestly disappointed that I simply can't have what fits out of
> > the box and to have to argue the point back and forth through multiple
> > Emails and a terse phone call.
> >
> > So, my questions to those of you running a 16P (late TR3 through
> > early TR6 and GT6 1968-72 along with many other British applications) are:
> >
> > 1. Are you using Porterfield pads in your calipers?
> >
> > 2. Have you found them to fit the standard 1/4" retaining pin?
> >
> > 3. If you have found them to not fit the pins, are you drilling
> > them out yourself?
> >
> > 4. Does the difference in pad shape concern you at all (photo
> > attached)?
> >
> > 5. If not Porterfield, then what are you using? Without divulging
> > any speed secrets, of course...
> >
> > I'm close enough to their facility that I can appear there with my
> > pins, pads and calipers to prove what they disbelieve...it just shouldn't
> > have to come to that with a reputable company from my view...
> >
> > Your thoughts and experience are appreciated.
> >
> > <ap1142008_03_24_10_51_45.jpg>
> >
> > <IMG_2858.jpg>
> >
> >
> > Thanks!
> >
> >
> > Brad Eells
> > Chino CA
> > #35 DP 1962 Triumph TR4
> > #76 FP 1969 Triumph Spitfire Mk3
> > 1965 Triumph TR4A IRS...for the road!
> >
> > _______________________________________________
> > fot at autox.team.net mailto:fot at autox.team.net
> >
> > http://www.fot-racing.com
> >
> > Donate: http://www.team.net/donate.html
> > http://www.team.net/donate.html
> > Archive: http://www.team.net/archive
> > Forums: http://www.team.net/forums
> > Unsubscribe/Manage:
> > http://autox.team.net/mailman/options/fot/sjanzen at me.com
> > http://autox.team.net/mailman/options/fot/sjanzen at me.com
> >
> >
> >
> >
> > >
> _______________________________________________
> fot at autox.team.net
>
> http://www.fot-racing.com
>
> Donate: http://www.team.net/donate.html
> Archive: http://www.team.net/archive
> Forums: http://www.team.net/forums
> Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/dlhogye at
> comcast.net
>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://autox.team.net/pipermail/fot/attachments/20180307/5b929e99/attachment.html>
|