Love the Porterfields, never had a problem.
Did somewhere along the line someone switch calipers? I know some are 3/16 and
some 1/4 holes.
I drilled out all my spares to 1/4 inch, all the same size. Less spares to
carry.
Be careful with calipers, the P and PB use a slightly different mounting bolt.
Memory escapes me as to the particulars.
Good luck.
Bill
----- Original Message -----
From: Brad Eells via Fot
To: fot
Sent: Wednesday, March 07, 2018 7:21 PM
Subject: [Fot] Trouble with Porterfield Brake Pads
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.
??
Thanks!
Brad Eells
Chino CA
#35 DP 1962 Triumph TR4
#76 FP 1969 Triumph Spitfire Mk3
1965 Triumph TR4A IRS...for the road!
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