Mont Posted January 29, 2018 Share Posted January 29, 2018 (edited) I've recently bought a Jspec twin turbo auto with the 2-pot fronts. At the moment the car is standard apart from a catback, however, I am thinking about going bpu. There's currently a bit of a vibration coming from the car after heavy braking which I'm guessing may be a warped disc, so one of the things I'm looking to do soon is to change the discs and pads and replace the brake fluid which looks a bit old. At the moment I'm trying to decide whether to upgrade the discs/pads etc or put off the bpu upgrade and get the upgraded Supra 4-pots. How effective can the 2-pots be with a good set of discs, pads, and a fluid upgrade? I'd be keen to hear from anyone who has done these upgrades. This September I'll be taking it the Nurburgring. I've been the past two years in a 2002 S3. The S3 was running around the same power as the Supra is currently and was around 60kgs heavier than the Supra. It had 312mm 2-pot fronts, Brembo grooved discs, Ferodo DS2500 pads, HEL braided lines and Motul RBF600 brake fluid. I'd be an 11min lapper, so not overly fast ; I'm just there to enjoy driving it within my own comfort levels. I also feel at that pace the Nurburgring feels more like a fast b-road blast to me than a proper all-out brake-intensive track day event. Obviously ideally I'd go 4-pots and that's possibly what I'd expect most replies to suggest, but I'd still be keen to know how good I could get the 2-pots in comparison. I've no intention of going further than bpu, the Nurburgring trip is one weekend a year and I'm generally relatively easy on brakes so I am unsure if I really need to upgrade the calipers unless the 2-pots are going to be rubbish no matter what. Thanks in advance. Edited January 29, 2018 by Mont (see edit history) Quote Link to comment Share on other sites More sharing options...
Scooter Posted January 29, 2018 Share Posted January 29, 2018 Some good info here, it's a polarising one often this http://www.mkivsupra.net/vbb/showthread.php?114677-Have-you-upgraded-to-UK-brakes&highlight=race+pads Quote Link to comment Share on other sites More sharing options...
rider Posted January 29, 2018 Share Posted January 29, 2018 You should read up this, it was a hoot with all sorts of banter around hearsay versus actual data on brakes. You will hear one thing, data says something else. For track use you definitely need to go big or ceramic discs in order to dissipate or counter the heat generated. Understanding big non OE brakes Quote Link to comment Share on other sites More sharing options...
Scooter Posted January 29, 2018 Share Posted January 29, 2018 (edited) Some more info SEE POST 32 http://www.mkivsupra.net/vbb/showthread.php?137208-stoping-distance-on-quot-big-brake-kits-quot&highlight=rubber+valve Essentially in my experience the J specs can be made to work well, but same pads and fluid will be worse than 4 pot/2 pot setup. Pads make a massive difference and then they can mean fluid boiling can be an issue, but get these two covered and have callipers operating perfectly and no reason not to track it. Edited January 29, 2018 by Scooter (see edit history) Quote Link to comment Share on other sites More sharing options...
Mont Posted January 29, 2018 Author Share Posted January 29, 2018 Thanks for the links folks. Some useful reading there and some differing opinions, which I suppose should have been expected. Fade would def be my main concern, but on the S3 2-pot setup I was able to pretty much eradicate fade with the braided lines and fluid. Not to say someone else wouldn't have overheated them on that set up, but I'm generally not a heavy breaker. I already have 2 litres of RBF600 bought and see the Goodridge braided lines seem to have more recommendations over HEL lines on here. I think the jspecs may stay for now and see how I get on, but if a decent 4pot/2pot brake setup appears for a good price in the next month or two I may still be tempted. Quote Link to comment Share on other sites More sharing options...
Edvard Posted January 31, 2018 Share Posted January 31, 2018 Or if you do not want to brake your wallet, just gor for the LS400 4 pot front brakes. They are bigger and better than the Jspec's and are direct bolt on. Quote Link to comment Share on other sites More sharing options...
Mont Posted January 31, 2018 Author Share Posted January 31, 2018 Thanks Edvard I've probably convinced myself that if I do upgrade to 4 pots, it would be worth spending the extra to get a decent used Supra set. Cosmetically I just prefer the look of the them over the LS400s, especially freshly painted with the Supra decals I also know what I'm like though and could easily see myself ignoring my previous decisions and impulse buying a pair of LS400 calipers if they came up for sale at handy money lol Quote Link to comment Share on other sites More sharing options...
Eightdip Posted February 11, 2018 Share Posted February 11, 2018 Hi guys, sorry to jump in on this one, but after reading some of the old threads linked above, I can't find the CW fast road pads that people have recommended. Do they still exist? If not, what would people recommend in their place? Just to summarise everything, it seems for the best performance on J Spec without breaking the bank, you want the following: Motul RBF600 dot 4 Fluid CW Fast road pads? Goodridge Braided Lines Stock Discs (skimmed) Correct? Quote Link to comment Share on other sites More sharing options...
rider Posted February 11, 2018 Share Posted February 11, 2018 Have you tried contacting Chris Wilson, send him an email - there is a link on his profile. Quote Link to comment Share on other sites More sharing options...
Frank Bullitt Posted February 11, 2018 Share Posted February 11, 2018 Hi guys, sorry to jump in on this one, but after reading some of the old threads linked above, I can't find the CW fast road pads that people have recommended. Do they still exist? If not, what would people recommend in their place? Just to summarise everything, it seems for the best performance on J Spec without breaking the bank, you want the following: Motul RBF600 dot 4 Fluid CW Fast road pads? Goodridge Braided Lines Stock Discs (skimmed) Correct? Here you go - http://www.mkivsupra.net/vbb/showthread.php?343621-Fast-road-pads-for-Jap-and-UK-spec-calipers-and-for-other-cars-than-Supras-too! [email protected] or 07971-952084 Quote Link to comment Share on other sites More sharing options...
Eightdip Posted February 11, 2018 Share Posted February 11, 2018 Thanks chaps! Was searching for a shop, hence why I couldn't find them...will give him a message! Quote Link to comment Share on other sites More sharing options...
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