I switched from the Carbotech pads to Porterfield. They work great and the car
stops faster!
~Steve
> On Jul 11, 2018, at 7:35 AM, DAVE HOGYE via Fot <fot at autox.team.net> wrote:
>
> Hi Tim,
>
> Just to clarify, the calipers on my TR3 are the 16PB TR6 units. They are
> similar to the 16P, but the P calipers have 1/4" pins and the PBs have 3/16"
> pins. The PBs also have a more durable flush seal design that I like. I
> open the pin hole to 1/4" for easier pad selection. If I get a set of pads
> with 3/16" holes, I just open them to 1/4". The PB caliper are sometimes
> referred to as "metric" because the mount holes and the bolt are metric
> sized.
>
> There shouldn't be any evidence of sanding or grinding marks around the edges
> of the pad backing plate or on the friction pad. If there is, they are most
> likely undersize.
>
> I have 4 sets of other pads. 2 different Moss compounds, 1 Hawk Blue and an
> old set of Raybestos that are still new in the box. None of these pads have
> any evidence of sanding or grinding on the plate edge. The edges are cleanly
> sheared.
>
> Also, the plates should be well proud of the friction material and they are
> on these 4 sets. On the Carbotech pads, the plates have been ground almost
> flush to the edge of the friction pad. So the pad edge is making contact
> with the caliper slot. Not good.
>
> It totally sucks that I have had to discover and study this matter. This can
> be regarded as a serious oversight from Carbotech. This could be
> potentially dangerous. I noticed this through a routine check after an event
> when one side seemed to be dragging more than the other.
>
> Dave H.
>
>> On July 11, 2018 at 6:36 AM timmmurphh at gmail.com wrote:
>>
>> Thanks for this report. We have had some issues with the Carbotech pads on
>> our TR4 at Blackhawk and the Kcup. We use the CT2-XP10 compound. I will
>> check our pad to caliper slot clearance. Does anyone know offhand of the
>> slot on the 16P calipers on our TR4 is the same as the TR3 at 3.095??
>>
>>
>>
>> Tim Murphy
>>
>> #317 TR4
>>
>>
>>
>> From: Fot <fot-bounces at autox.team.net> On Behalf Of DAVE HOGYE via Fot
>> Sent: Tuesday, July 10, 2018 3:22 PM
>> To: Friends of Triumph <Fot at autox.team.net>
>> Subject: [Fot] brake pad and rotor discovery and update
>>
>>
>>
>> Hello Friends,
>>
>> I have been finding out quite a bit about the unusual and developing front
>> brake pad, rotor and caliper issues that I have discovered on my TR3.
>>
>>
>>
>> What I found was that the Carbotech CT-57 pads were causing the problem.
>>
>>
>>
>> The supporting or backing plates of the pads had been ground down at
>> Carbotech, far under the normal plate width that I measured in 4 other
>> production pads that I have on hand. Besides that, they were not ground
>> down squarely.
>>
>>
>>
>> This allowed the piston to take tremendous side load under braking causing
>> the uneven and diagonal wear pattern in the pads. This also caused the
>> rotor to contact the caliper as the pads took on heavy uneven wear.
>>
>>
>>
>> The slot in the TR6 caliper is 3.095" and the four non-Carbotech pads sets
>> have a plate width of no less than 3.082". The Carbotech plates have an out
>> of square measurement of 3.030-3.050". That's as much as .065" clearance in
>> the caliper slot.
>>
>> The plates have too much clearance. I found that a maximum of .010" backing
>> plate to caliper slot clearance is more normal. One set of pads have only
>> .005" clearance.
>>
>>
>>
>> Furthermore, the corners of the Carbotech plates and pads were ground down
>> far enough that the lower end of the pads hardly made contact with the
>> caliper slot allowing more stress on the caliper piston.
>>
>>
>>
>> I have been going back and forth with Carbotech on this matter and I will be
>> sending back the badly worn set along with a brand set that have the same
>> production issues. I bought the two sets at the same time last August.
>>
>>
>>
>> What I found is that any backing plates that show evidence of sanding or
>> grinding marks should be measured for proper clearance, but that really,
>> there should be no sanding or grinding marks...ever.
>>
>>
>>
>> All of the other pads I have show no evidence of sanding or grinding marks.
>> The previously shaped friction pads are cleanly attached to the backing
>> plates and the backing plate is revealed around the friction material. Only
>> the backing plate makes contact with the caliper slot.
>>
>>
>>
>> It looks like I have to find another race pad supplier.
>>
>>
>>
>> Thoughts?
>>
>>
>>
>> Dave H.
>>
>> 831-234-4928
>>
>>
>>
>
>
> _______________________________________________
> fot at autox.team.net
>
> http://www.fot-racing.com
>
> Donate: http://www.team.net/donate.html
> Archive: http://www.team.net/pipermail/fot
> Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/steve at
> artwithcars.com
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://autox.team.net/pipermail/fot/attachments/20180711/7ab99b23/attachment.html>
|