F-Type ( X152 ) 2014 - Onwards
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Porterfield R4S pads now available

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  #101  
Old 10-25-2017, 09:57 AM
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Originally Posted by SVR
As these are pretty much the only pads available, would you guys recommend them over the stock pads for a track-day, or is their performance roughly the same? I'm aware of the reduction in dust but that's not a big concern.
I seem to remember another member starting a thread about another brand of pads and I also seem to remember that Porterfield has a track version of these pads.

Try a search.
 
  #102  
Old 10-25-2017, 10:10 AM
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With a lighter car('00Z3MCoupe) these pads were great for track days and the street until I "graduated " to sticky track tires. Then started to get some fade and so went to dedicated track pads to go with the dedicated track wheels and tires.
So far I haven't "needed" them on my R but will change them out over the winter.
YMMV
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  #103  
Old 10-25-2017, 10:17 AM
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Originally Posted by RGPV6S
I seem to remember another member starting a thread about another brand of pads and I also seem to remember that Porterfield has a track version of these pads.

Try a search.
Yep, thanks...I seem to remember using the search feature of the forum beforehand.
 
  #104  
Old 10-25-2017, 12:37 PM
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Originally Posted by SVR
As these are pretty much the only pads available, would you guys recommend them over the stock pads for a track-day, or is their performance roughly the same? I'm aware of the reduction in dust but that's not a big concern.
The R-4 compound is a better track option but it squeals like a **** once you drive on the road.

The R4-S has been tracked pretty extensively by my Aston customers and with a good Racing Brake fluid should stand up nicely to occasional use.
 
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  #105  
Old 10-25-2017, 01:00 PM
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Originally Posted by SVR
Yep, thanks...I seem to remember using the search feature of the forum beforehand.
Apparently you aren't very good using it. Here is a thread found in about 10 seconds using search:

https://www.jaguarforums.com/forum/f...e-pads-181701/
 
  #106  
Old 10-25-2017, 02:00 PM
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Originally Posted by Stuart@VelocityAP
The R-4 compound is a better track option but it squeals like a **** once you drive on the road.

The R4-S has been tracked pretty extensively by my Aston customers and with a good Racing Brake fluid should stand up nicely to occasional use.
I'd definitely go with the R4 instead of the R4-S, however Porterfield does not list it available for the F-Type. Other online resources list just the R4-S as well. Perhaps they have an application but haven't updated their database? Any additional insight?

Originally Posted by RGPV6S
Apparently you aren't very good using it. Here is a thread found in about 10 seconds using search:

https://www.jaguarforums.com/forum/f...e-pads-181701/
Yep...saw that thread. Thanks.
 
  #107  
Old 10-25-2017, 03:43 PM
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RS-4 is really a street pad, but may be ok for occasional track use. I've read on other forums (BMW M3) these are not ideal for extreme track use - if they get too hot, they wear incredibly fast. If its a high speed track like the big track at Willow Springs you may be ok, as they will have a chance to cool between turns, but smaller, more technical tracks could be problematic, especially considering the F-Type's heft.

The R-4 by porterfield would be a great track pad, but not for the street. Keep in mind the problem with R-4's by most accounts besides the squeal is they have low grip when cold, so on the street they would be far from optimal.
 

Last edited by Chawumba; 10-25-2017 at 03:46 PM.
  #108  
Old 10-25-2017, 03:51 PM
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Sounds good. Where can I order some R4 pads for my car?
 
  #109  
Old 10-27-2017, 04:46 PM
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Originally Posted by SVR
Sounds good. Where can I order some R4 pads for my car?
Anyone?
 
  #110  
Old 10-27-2017, 05:46 PM
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It's not clear if Porterfield make the R4 (as opposed to the R4S) for the F-Type, but it seems the US distributor for Porterfield brake pads is Livermore Performance Inc, see here: Brakes, Safety Gear, Suspension for Street and Track - LPI Racing - LPI Racing
Maybe give them a call?
 
  #111  
Old 10-30-2017, 11:45 PM
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My R4S brakes (v6 model) seem to screech a abit right before car fully stops. This only happens before the brakes are warmed up. Is this normal?
 
  #112  
Old 10-31-2017, 10:16 AM
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Originally Posted by SVR
Anyone?
Don't you have CCM's with the SVR? If you do the R4 won't be compatible.

If you have steels just shoot me an email and I can set it up for you.
 
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  #113  
Old 10-31-2017, 10:18 AM
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Originally Posted by hwa23
My R4S brakes (v6 model) seem to screech a abit right before car fully stops. This only happens before the brakes are warmed up. Is this normal?
These pads should be pretty quiet. When you installed them, did you use some grease/lube on the back of the pads, and how did you bed them in?

Often times if you're having trouble with noise, just good hard, long duration application on the brakes a couple times from speed will cure it.
 
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  #114  
Old 10-31-2017, 11:16 AM
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Originally Posted by Stuart@VelocityAP
Don't you have CCM's with the SVR? If you do the R4 won't be compatible.

If you have steels just shoot me an email and I can set it up for you.
Mine's fitted with the standard iron brakes.

Just sent you an email.
 
  #115  
Old 11-26-2018, 04:24 PM
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Message for Stuart/Chris:
Your listings for the Porterfield R4S F-Type base front brake pads (AP 1751, 355 mm) are a little misleading, both on the VAP site and the David Appleby site.
They both show a schematic of the 192 mm wide pads for the 380 mm front brakes, not the 355 mm front brakes.
I'm having trouble finding the same type of schematic for the 355 mm pads but I think they are 155.2 mm wide (a helluva lot smaller than the 380 mm pads).
This may (or may not!) cause some confusion with prospective buyers of these pads.
 

Last edited by OzXFR; 11-26-2018 at 04:28 PM.
  #116  
Old 12-03-2018, 10:05 AM
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FYI I have a set of like new R4s pads for super brake package if anyone wants them.
 
  #117  
Old 12-03-2018, 02:00 PM
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Originally Posted by John Jones
FYI I have a set of like new R4s pads for super brake package if anyone wants them.
Just PM’d you.
 

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