auyt Posted January 14, 2020 Share Posted January 14, 2020 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? Link to comment Share on other sites More sharing options...
SM25T Posted January 14, 2020 Share Posted January 14, 2020 How old is the fluid ? Any water in it will migrate down to the calipers and boil when hot. Should ideally be replaced every 2-3 years. Very easy to do. Makes a big difference. Link to comment Share on other sites More sharing options...
auyt Posted January 14, 2020 Author Share Posted January 14, 2020 The fluid is only 12 months old as I had rebuilt the calipers and replaced all the flex lines with Caterham braided hoses. Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted January 14, 2020 Member Share Posted January 14, 2020 Previous discussions of DS2500s.Jonathan Link to comment Share on other sites More sharing options...
elie boone Posted January 14, 2020 Share Posted January 14, 2020 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. Link to comment Share on other sites More sharing options...
auyt Posted January 14, 2020 Author Share Posted January 14, 2020 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. Link to comment Share on other sites More sharing options...
7 wonders of the world Posted January 14, 2020 Share Posted January 14, 2020 So your front discs are 9" with grooves machines into the surface ?Calipers stock cast iron 2 piston (Triumph spitfire) ?Is your car De Dion with the Sirerra calipers on the rear or live axle with drums..? Link to comment Share on other sites More sharing options...
auyt Posted January 14, 2020 Author Share Posted January 14, 2020 So your front discs are 9" with grooves machines into the surface yesCalipers stock cast iron 2 piston (Triumph spitfire) yes live axle with drums..yesand one other thing a bake booster on the front, I didn't fit it but the brake balance seems to work. Link to comment Share on other sites More sharing options...
7 wonders of the world Posted January 14, 2020 Share Posted January 14, 2020 Are you meaning an indirect servo ...? are you sure its only on the fornt brake line..?Is your master cylinder a tandem version ? Link to comment Share on other sites More sharing options...
auyt Posted January 15, 2020 Author Share Posted January 15, 2020 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. Link to comment Share on other sites More sharing options...
7 wonders of the world Posted January 15, 2020 Share Posted January 15, 2020 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.... Link to comment Share on other sites More sharing options...
auyt Posted January 15, 2020 Author Share Posted January 15, 2020 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? Link to comment Share on other sites More sharing options...
SM25T Posted January 15, 2020 Share Posted January 15, 2020 I recall the biggest engine in the UK Marina was a 1.8 litre 4 cylinder. That was quite fast in a light car in those days. The later Princess was available with a straight 6 2.2 litre. Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted January 15, 2020 Member Share Posted January 15, 2020 Did the Uk have a 6 cylinder engine in what I know as a Leyland Marina?No. Only Australia and South Africa.Jonathan Link to comment Share on other sites More sharing options...
Sooty Posted January 15, 2020 Share Posted January 15, 2020 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. Link to comment Share on other sites More sharing options...
auyt Posted January 16, 2020 Author Share Posted January 16, 2020 Good insight into the Pagid pads, my experience with a 205 GTI pug echos your comments. I prefer not to have to warm brakes but I will keep them in mind. Link to comment Share on other sites More sharing options...
7 wonders of the world Posted January 16, 2020 Share Posted January 16, 2020 Mintex 1144 are popular and inexpensive..... though noisy and smelly ! and are ok from coldI run Ferodo DS3000 all round - these are fantastic from cold and just get better as you lean on them, best pads I've tried by a mile. Link to comment Share on other sites More sharing options...
auyt Posted January 16, 2020 Author Share Posted January 16, 2020 I've had a suggestion from a friend who runs an exceptionally quick Elan and single seater Elfin, that the 1144 Mintex pads are what he uses exclusively. Seems I have a bit to play with. Link to comment Share on other sites More sharing options...
TomB Posted January 16, 2020 Share Posted January 16, 2020 For a road car, isn't 'good from cold' a must? Link to comment Share on other sites More sharing options...
john g Posted January 16, 2020 Share Posted January 16, 2020 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. Link to comment Share on other sites More sharing options...
auyt Posted January 16, 2020 Author Share Posted January 16, 2020 I agree the opportunity to warm brakes is not always possible, where I live which is effectively like an English village I dont hove the time to focus on warming brakes before I need them. Link to comment Share on other sites More sharing options...
Drumster Posted January 16, 2020 Share Posted January 16, 2020 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. Link to comment Share on other sites More sharing options...
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