Jaguar XKR 5.0 brake pads
Discussion
Not long fitted mtec j-hooks and mintex pads on the front of my XFR.
Discs look fantastic but still a fair amount of dust from the pads. Don’t really notice any major difference in braking from the old OEM stuff that was on it and I also fully refurbed the calipers with new pistons and seals.
Discs look fantastic but still a fair amount of dust from the pads. Don’t really notice any major difference in braking from the old OEM stuff that was on it and I also fully refurbed the calipers with new pistons and seals.
5.0 XKR OEM front pads are rated GG for friction (first character is cold, second is hot) and rears are rated FF, there are no aftermarket pads which are rated as high as GG. Even the often-touted EBC stuff is all EE which is two ratings poorer. Plenty of folk will tell you subjectively that EBC Redstuff or Yellowstuff pads are "better than stock" but they'll likely be comparing fresh new pads with old, worn out ones. Ceramic compound pads generate a fair bit less dust but don't perform so well when they're cold, IME.
Regards discs, a disc is a disc is a disc really, until you get into the suspiciously cheap crap off ebay, that's best avoided. OE discs are relatively inexpensive and perform no better or worse than anything else. Slotted or dimpled on a road car is only "better" in looks. Discs which are drilled right through are prone to cracking around the holes. The suspension geometry does mean that these cars are more prone to warping discs than many so spending a fortune on discs is a false economy.
This is all covered very well in the XK/XKR (X150) section over on Jaguarforum.com. The most qualified and experienced folks on there make a convincing argument that the OE parts are as good as you'll get, unless you have very specific requirements e.g. it's a dedicated track car. Modern braking systems are so heavily servo-assisted that this is the biggest factor in determining the braking performance of a car anyway but as above, using a good quality brake fluid will help a bit and if your discs and pads need changed anyway then fair enough but don't expect miracles.
Regards discs, a disc is a disc is a disc really, until you get into the suspiciously cheap crap off ebay, that's best avoided. OE discs are relatively inexpensive and perform no better or worse than anything else. Slotted or dimpled on a road car is only "better" in looks. Discs which are drilled right through are prone to cracking around the holes. The suspension geometry does mean that these cars are more prone to warping discs than many so spending a fortune on discs is a false economy.
This is all covered very well in the XK/XKR (X150) section over on Jaguarforum.com. The most qualified and experienced folks on there make a convincing argument that the OE parts are as good as you'll get, unless you have very specific requirements e.g. it's a dedicated track car. Modern braking systems are so heavily servo-assisted that this is the biggest factor in determining the braking performance of a car anyway but as above, using a good quality brake fluid will help a bit and if your discs and pads need changed anyway then fair enough but don't expect miracles.
I did all mine about 18 months back.
The only discs I could find for the drilled and grooved were the MTec, and I went for the EBC red stuff.
I only changed as the old discs had a slight rim building up, and I wanted drilled and grooved 'cos I like the look!
Absolutely no complaints in performance, less dust. The only possible negative with the discs is how quickly they corrode if you leave the car sat out in the wet unused. If I've not used the XKR for 4 weeks or more it can take a few hundred miles to rub off the surface back to smooth.
The only discs I could find for the drilled and grooved were the MTec, and I went for the EBC red stuff.
I only changed as the old discs had a slight rim building up, and I wanted drilled and grooved 'cos I like the look!
Absolutely no complaints in performance, less dust. The only possible negative with the discs is how quickly they corrode if you leave the car sat out in the wet unused. If I've not used the XKR for 4 weeks or more it can take a few hundred miles to rub off the surface back to smooth.
[quote=8bit]5.0 XKR OEM front pads are rated GG for friction (first character is cold, second is hot) and rears are rated FF, there are no aftermarket pads which are rated as high as GG. /quote]
Is there a way of finding out the ratings? A quick google suggest it's not that easy for my brembo'd XJR.
Cheers
Is there a way of finding out the ratings? A quick google suggest it's not that easy for my brembo'd XJR.
Cheers
Excellent insight there 8bit. Last year I renewed the discs and pads on my XKR and opted for OEM discs and EBC red stuff pads, I personally don't rate the EBC pads at all due to the small operating window they appear to have which results in low bite when cold and low bite after a brief spell of pressing on abit which aligns with the rating data you mention below.
It is my understanding that Jaguar OEM front pads are manufactured by Jurid, do you know what brand pads Jaguar used on the rear of the car? (Car is a 2009 5.0 model)
It is my understanding that Jaguar OEM front pads are manufactured by Jurid, do you know what brand pads Jaguar used on the rear of the car? (Car is a 2009 5.0 model)
8bit said:
5.0 XKR OEM front pads are rated GG for friction (first character is cold, second is hot) and rears are rated FF, there are no aftermarket pads which are rated as high as GG. Even the often-touted EBC stuff is all EE which is two ratings poorer. Plenty of folk will tell you subjectively that EBC Redstuff or Yellowstuff pads are "better than stock" but they'll likely be comparing fresh new pads with old, worn out ones. Ceramic compound pads generate a fair bit less dust but don't perform so well when they're cold, IME.
Regards discs, a disc is a disc is a disc really, until you get into the suspiciously cheap crap off ebay, that's best avoided. OE discs are relatively inexpensive and perform no better or worse than anything else. Slotted or dimpled on a road car is only "better" in looks. Discs which are drilled right through are prone to cracking around the holes. The suspension geometry does mean that these cars are more prone to warping discs than many so spending a fortune on discs is a false economy.
This is all covered very well in the XK/XKR (X150) section over on Jaguarforum.com. The most qualified and experienced folks on there make a convincing argument that the OE parts are as good as you'll get, unless you have very specific requirements e.g. it's a dedicated track car. Modern braking systems are so heavily servo-assisted that this is the biggest factor in determining the braking performance of a car anyway but as above, using a good quality brake fluid will help a bit and if your discs and pads need changed anyway then fair enough but don't expect miracles.
Regards discs, a disc is a disc is a disc really, until you get into the suspiciously cheap crap off ebay, that's best avoided. OE discs are relatively inexpensive and perform no better or worse than anything else. Slotted or dimpled on a road car is only "better" in looks. Discs which are drilled right through are prone to cracking around the holes. The suspension geometry does mean that these cars are more prone to warping discs than many so spending a fortune on discs is a false economy.
This is all covered very well in the XK/XKR (X150) section over on Jaguarforum.com. The most qualified and experienced folks on there make a convincing argument that the OE parts are as good as you'll get, unless you have very specific requirements e.g. it's a dedicated track car. Modern braking systems are so heavily servo-assisted that this is the biggest factor in determining the braking performance of a car anyway but as above, using a good quality brake fluid will help a bit and if your discs and pads need changed anyway then fair enough but don't expect miracles.
Russ Sims said:
Excellent insight there 8bit. Last year I renewed the discs and pads on my XKR and opted for OEM discs and EBC red stuff pads, I personally don't rate the EBC pads at all due to the small operating window they appear to have which results in low bite when cold and low bite after a brief spell of pressing on abit which aligns with the rating data you mention below.
You are not alone thereStedman said:
8bit said:
5.0 XKR OEM front pads are rated GG for friction (first character is cold, second is hot) and rears are rated FF, there are no aftermarket pads which are rated as high as GG.
Is there a way of finding out the ratings? A quick google suggest it's not that easy for my brembo'd XJR.Cheers
Some more info on Edge Codes here - http://faculty.ccbcmd.edu/~smacadof/DOTPadCodes.ht...
Russ Sims said:
Excellent insight there 8bit. Last year I renewed the discs and pads on my XKR and opted for OEM discs and EBC red stuff pads, I personally don't rate the EBC pads at all due to the small operating window they appear to have which results in low bite when cold and low bite after a brief spell of pressing on abit which aligns with the rating data you mention below.
It is my understanding that Jaguar OEM front pads are manufactured by Jurid, do you know what brand pads Jaguar used on the rear of the car? (Car is a 2009 5.0 model)
Rear pads are made by ATE, who also make the front and rear calipers. Not sure why Jaguar chose Jurid over ATE for the front pads but possibly because the Jurid pads are rated better than the ATEs. The ABS system is also calibrated for a GG front pad and FF rear.It is my understanding that Jaguar OEM front pads are manufactured by Jurid, do you know what brand pads Jaguar used on the rear of the car? (Car is a 2009 5.0 model)
8bit said:
Not that easy unfortunately, not here anyway. The two-character rating system (officially known as Edge Codes) has not been globally recognised yet. Pads made for sale in the US are required by US law to carry them on the pad backing plates. If you get lucky and can find an actual photo of the pads you're interested in on a shop or manufacturer's website then you may see them there.
Some more info on Edge Codes here - http://faculty.ccbcmd.edu/~smacadof/DOTPadCodes.ht...
Top man, thank you.Some more info on Edge Codes here - http://faculty.ccbcmd.edu/~smacadof/DOTPadCodes.ht...
Stedman said:
Top man, thank you.
No problem, happy to contribute.Another thing worth noting, right now there is only one ceramic (low dust) GG-rated pad to fit the front calipers on a 5.0 XKR/XKR-S, also from Jurid it's their "Jurid White" range. I bought a set of these for my car and found that the friction material is 2mm too thick; they're for a BMW M5 or M6 (the V10 generation) which takes the same shape but thicker pad. I ended up sanding 2mm off them. They work pretty well but do require some heat to bite hard. Dust is reduced but not eliminated. Next time I think I'll just get the standard ones again.
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