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The mkiv Supra Owners Club

How Cr*p are J-Spec Brakes?!


Mark Ayling

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There is a difference between bite, control and overall stopping power. They J spec brakes arn't that good at all three but I'd also say they arn't too bad. Lots of people have had good results with CW pads. A fluid change may well help as that could be old and tired. Most people who've upgraded to UK brakes have gone from a 9 yr old system to new disks, calipers, hoses and fluid. That must be taken into account.

 

Tyres also make a big difference. With both my J spec and UK spec brakes my ABS would come in quite a bit; now I'vr got F1's on the front it hardly ever comes in when dry and occasionally when wet.

 

The g-tech pro meter I've got does 60-0MPH in feet, If I ever make it along to a non-carpark meet I'll bring it and we can play.

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I found braking in normal conditions ie 70leps and below. the Jap brakes were fine. It was repeated heavy braking or trying to stop from 130leps plus, in a limited space that caused the most stress or - "softening of the stools"- ( Chris R)

 

I know that I killed mine on the track, as the brakes were in really good nick when I got the car hardly used. But after a day at Bentwaters in a totally stock car, the discs warped and I got a terrible judder when stopping hard from over 100 leps

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Originally posted by MONKEYmark

i got told it would affect bias of braking.

 

Quite a few members of this BBS have fitted just the UK fronts, the bias only brings the rears into play in any significant way at low speeds. You will notice a huge difference from just the fronts.

 

Get it done ASAP.

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