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Xflow front Brake pads


auyt

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I use my car mainly for road use however recently on a spirited down hill mountain pass run the fronts lost most of their grip. They came good once cooled. 
The brakes at the front are all new with slotted rotors, I'm not sure what the pads sorry, are but they obviously not up to my occasional mountain run.

some reasurch suggests DS2500 but that was a few years ago has what have others found?

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Mintex M 1144 works fine on std calipers, your slotted disc's will surely help cooling but if the mountain pass has a lot of hairpins then it might be a case that the system overheats due to the lack of airflow that would cool the disc and caliper.

vented rotors with 4 pot calipers would possible be the cure and then you have 2 options, the heavy and more expensive one is CC, the lighter and with much better pedal feel and also cheaper option is Hi-Spec. for this later option i have the parts codes ( disc,rotor,alloy bell ) for a plug and play system.

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Jonathan thanks for the link.

elie , the mintex are also of interest. And the upgraded brakes are definitely a consideration and something to investigate further.

The passes (4) near me are have short distances between tight turns, huge fun but busy the YouTube videos don't do it justice.

 

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So your front discs are 9" with grooves machines into the surface  yes

Calipers stock cast iron 2 piston (Triumph spitfire)  yes

 live axle with drums..yes

and one other thing a bake booster on the front, I didn't fit it but the brake balance seems to work.

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Yep inline V45, lives in front of the pedal box (RHD) , yes tracked all the lines and yes definitely only fronts, and it's only boosts the front line from a tandem master.
I did consider removing it but I figured Id try it before removing it. And it only puts in a small amount of boost, and it could have been installed due th brake balance being out and I also learnt a lady used to drive the car and I can only gather it was at here request.

It could be depriving the force to the rear and hence the fronts are getting hotter than they should, food for thought. Might try taking the vacuumed off and doing some test brakes, to see it the rear lock first. 

 

 

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The rears are doing little at the moment which is why your fronts are fading, due to the location of the driver and therefore rear axle loading the rears normally do a significant amount of work.

Take it off, check the rears are still in good working order and haven't partially siezed through lack of use (drums off etc) and re evaluate.

We can go from there....

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Good plan, it's not until I describe the system and especially your input, that it become obvious. The car was built in Australia so I'm not sure what the rear axle brake slave cylinder are. Did the Uk have a 6 cylinder engine in what I know as a Leyland Marina?

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I had some lengthy discussions with James Whiting about brake upgrades on my road use xf after I suffered fading on EBC Greenstuff pads. Conclusion was that standard calipers (type 14) with standard solid discs fresh brake fluid and uprated pads would be more than adequate upto about 150 bhp. After some research I went for Pagid blue.

They do need warming up but when they are they are like a parachute and throwing out an anchor and no fade. There is a bit of low grade squeal at low speed but overall feel and pedal pressure is firm and progressive. Only warning is that they MUST be properly bedded in ( clear instructions provided) with deglazed discs. They are a bit pricey but I will use the same again when the time comes.

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I'm running with M1144 pads in front standard Girling type 14 callipers and standard brake shoes in the Ital (Marina) rear axle and for road use I'm quite happy with it. I believe the rear brake slave cylinders are available in two different (bore) sizes. I'm not sure what size mine are ....... i just order the 'stuff' from RedLine.

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I've used Mintex 1144 in standard calipers and standard discs on the front for pretty much 15 years (I think) and at least 60,000 miles. Car was originally a '93 X/flow Supersprint but a 200bhp Zetec since 2012. In that time I driven many mountain passes, trackdays and competed for last 10 years in sprints/hillclimbs. Never had a problem from cold and never suffered brake fade.

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