Ian C Posted October 5, 2004 Share Posted October 5, 2004 All, and by that I mean Chris Wilson , While testing my nice new working-ignition single turbo I wound the car up to 170lph and braked as hard as I could. While the retardation was immense, I couldn't get the ABS to cut in no matter how hard I pressed and I'm sure I got the pedal down to the floor at one point. I can't believe my worn Pirelli's are that good, so what's going on there then? The brakes were fine afterwards, in fact the pedal felt a bit better I've got: All round UK spec calipers Stock UK spec discs CW fast road pads Motul brake fluid (er, rbf600 or is that a motorbike? Well, it's the stuff Chris Wilson likes anyway) This behaviour only seems to manifest when I'm braking from daft speeds down to 'normal' ones (170 down to 80 sorta thing) I don't think the fluid is boiling, it got new fluid and a flush less than a year ago, it brakes in a straight line... Do I need the track pads? I can't believe the UK spec system isn't up to the job, please no daft suggestions of £2500 brake upgrades -Ian Link to comment Share on other sites More sharing options...
Alex Posted October 5, 2004 Share Posted October 5, 2004 Maybe it's worth finding more abrasive and probably shorter life pads with a higher Mu (friction not the company) rating? They will cause more brake dust though. Or maybe it's caused my gas build up not allowing you to press the pads onto the disc hard enough. I would try either, new short life Hi Mu pads or slotted discs to dissipate gasses better....or both Link to comment Share on other sites More sharing options...
Ian C Posted October 5, 2004 Author Share Posted October 5, 2004 Gas buildup is my working theory... Slotted discs. Hmmm. I'll wait for more replies before taking a stance on those -Ian Link to comment Share on other sites More sharing options...
Alex Posted October 5, 2004 Share Posted October 5, 2004 Paul Laing reckons 3G 20 groove discs are great In all seriousness they make discs for Brembo I believe so maybe a good bet Link to comment Share on other sites More sharing options...
RICHARDA Posted October 5, 2004 Share Posted October 5, 2004 Ian, I have exactly the same brake spec as you and have been very pleased with the performance. Although not braking from the mega speeds you mention I too have performed a couple of brake tests in the dry running F1's from about 60ish and have managed to activate the ABS. HTH Rich Link to comment Share on other sites More sharing options...
matt Posted October 5, 2004 Share Posted October 5, 2004 10 year old hoses?? Unless, of course, you've changed them... Link to comment Share on other sites More sharing options...
Mad Ad Posted October 5, 2004 Share Posted October 5, 2004 Whenever I'm braking hard, I like to take my foot off the pedal for a split second then start braking again. Seems to work quite well for my car. Suppose it gives them a quick rest before working again. Link to comment Share on other sites More sharing options...
Ian C Posted October 5, 2004 Author Share Posted October 5, 2004 And Goodridge braided hoses Thanks Matt Maybe it's just THAT much harder to stop a wheel dead when it's turning at 170mph than at say 40mph...? -Ian Link to comment Share on other sites More sharing options...
Gordon F Posted October 5, 2004 Share Posted October 5, 2004 Originally posted by Ian C Maybe it's just THAT much harder to stop a wheel dead when it's turning at 170mph than at say 40mph...? -Ian There's certainly a lot more heat involved. Probably a bit of fade after pulling 1500kgs down from 170 to 0 Link to comment Share on other sites More sharing options...
dandan Posted October 5, 2004 Share Posted October 5, 2004 You crazy SOB, imagine if they did lock at that speed ! Link to comment Share on other sites More sharing options...
Ian C Posted October 5, 2004 Author Share Posted October 5, 2004 Originally posted by dandan You crazy SOB, imagine if they did lock at that speed ! This is why I don't drive cars without ABS What I mean is, I can't feel the ABS kicking in... Not that the wheels lock up per se. -Ian Link to comment Share on other sites More sharing options...
Sharpie Posted October 5, 2004 Share Posted October 5, 2004 I have the exact same set up as you Ian, bar the rubber so, I'll give it a try if it's dry tomorrow, it won't be 170 though (I have new pads, discs, fluid & F1's only in the last few months) Link to comment Share on other sites More sharing options...
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