Richard Posted July 26, 2011 Author Share Posted July 26, 2011 Hi there,yeah no problem.could arrange to meet halfway if serious. Link to comment Share on other sites More sharing options...
Richard Posted July 26, 2011 Author Share Posted July 26, 2011 hi there.have used dot 5 silicon fluid as it has better resistance to absorbing moisture.it does not need to be compatible with dot 3,4 or 5.1 asi have completly purged the system and replaced with dot 5. Link to comment Share on other sites More sharing options...
Dnk Posted July 26, 2011 Share Posted July 26, 2011 hi there.have used dot 5 silicon fluid as it has better resistance to absorbing moisture.it does not need to be compatible with dot 3,4 or 5.1 asi have completly purged the system and replaced with dot 5. No offence intended here Richard but its not as straight forward as that. Heres a very good right up on the pro's and cons of silicon based brake fluid. Sorry its a bit long but its well worth reading. Silicone Brake Fluids In years past, all brake fluids were glycol. Then D.O.T. 5, a silicone fluid having a higher temperature rating, emerged, initially to meet the higher boiling point requirements of racing use. (Race car brake systems include oil-cooler-like heat exchangers and ceramic pads.) Silicone fluid was able to withstand the most heat of any brake fluid, so it earned a reputation as a racing brake fluid. However, silicone brake fluid has properties very different from glycol fluid, and has its own pros and cons. On the advantage side, silicone fluid will not harm paint or plastic, and does not aggressively attract additional moisture as glycol fluid does. On the disadvantage side however, silicone fluid aerates easily. Harley-Davison, one of the sole current OEM users of silicone fluid, warns buyers to let the fluid sit at least an hour before using it. The trip home in the saddlebag is enough to aerate silicone brake fluid until it looks like a freshly poured soft drink. Silicone fluid is also slightly more compressible than glycol fluid, does not change color to tip the user to its moisture content, and worst of all, neither accepts or disperses moisture, making systems using it more corrosion prone, and requiring much more frequent fluid changes. Silicone brake fluid also lacks glycol fluid's naturally occuring lubricity, making it incompatible with the mechanical valving in some antilock braking systems. Which is Best? As you may have noticed by now, instead of looking at brake fluid as D.O.T. 3/4 versus D.O.T. 5, we should see the issue as glycol versus silicone. This represents the larger division of type, and comparing D.O.T. ratings just isn't significant, especially since D.O.T. 5 fluids are now available in glycol formulation. Glycol fluids have improved until they now meet D.O.T. 5 standards. D.O.T. 5.1 for example, is a glycol fluid designed for certain ABS systems having mechanically cycling proportion valves. So now we have D.O.T. 3, 4, 5, and 5.1, with all but the 5 designation being glycol, while the 5 is silicone. The real way to compare brake fluids is by deciding what is important to you. Is silicone fluid's safety around paint and plastic more important than yearly changes and a softer action? Its higher boiling point, the reason for its development and at one time its strong suit, is now academic, since D.O.T. 5 glycol (5.1) fluids are now widely available. Glycol fluid therefore is, for most of us, the better brake fluid, and the best just may be the 5.1, if the highest boiling point, which is really a moisture tolerance measurement, matters. On the practical side, beware that glycol and silicone brake fluids are hugely incompatible with each other. Mixing even small amounts will create a sludge that looks amazingly like Italian salad dressing and is about as effective as a brake fluid -- meaning, not. Of further consideration is that, in some cases, the hardware designed for one fluid will not accept the other. Brake caliper and master cylinder seals, hoses, and other parts won't always work correctly when the type of fluid is changed. Summary Over the years, the debate has continued as to which is the best fluid. Racers and custom builders have traditionally promoted silicone fluid, and many street riders have assumed this meant it was good for them also. However, silicone is the highest-maintenence of all brake fluids, one that demands frequent attention. While this is acceptable in a race setting, it is less so in everyday commuting. The plain fact remains that vehicle manufacturers use glycol fluid because, with its being designed for the average consumer, it poses the least liability to them. In reality, the answer to the usage question is simple -- the brake fluid type the manufacturer recommends is the best. In most cases this will be the glycol fluid, the one that is designed to meet all of your brake system's demands and do so with very little fuss. Link to comment Share on other sites More sharing options...
Guest marlowssupra Posted July 26, 2011 Share Posted July 26, 2011 Hi there,yeah no problem.could arrange to meet halfway if serious. hi mate i am serious love your car and i am only down the road live in bideford north devon . send you a pm now Link to comment Share on other sites More sharing options...
l33wgn Posted July 26, 2011 Share Posted July 26, 2011 dumb phone Link to comment Share on other sites More sharing options...
l33wgn Posted July 26, 2011 Share Posted July 26, 2011 marlowssupra did you buy your car from supraman mk4? Link to comment Share on other sites More sharing options...
Guest marlowssupra Posted July 26, 2011 Share Posted July 26, 2011 marlowssupra did you buy your car from supraman mk4? yes mate great car just not for me Link to comment Share on other sites More sharing options...
Recommended Posts