JDM Brake upgrade opinion

[Tom86]

Hi guys,

Been looking at getting a JDM calipers/discs as an upgrade to my stock Aus 86 brake. Would like to hear what people that have actually done this upgrade think. Is there significant improvement to the braking performance?
as from what I can see there isn't much different between the two apart from JDM rotor is vented and slightly thicker.

Is it worth it?

[mikewestphoto]

I've got RB74 pads in my Jap brakes. They stop pretty well. I took 2 guys off supra forums for a ride in my car and they were shocked to see my car stop better than their supras.

You can have a drive of my car if you want.

[mattysshop]

they don't have any more clamping force.. but they disperse heat significantly better, they use the same pads as aussie ones.. only really nessisary if you are already pushing your car with the ADM brakes to the point of experiencing brake fade.. which in some case you can help buy changing yout brake fluid to DOT 4 or 5 (if you run dot 3) and a good set of front pads..

for the rear.. try getting your old drum linings rebonded with commercial truck linings.. they deal with the heat alot better.. and bite more..

if however you have a soft spongey pedal.. try getting new brake lines.. all 5 flex lines.. rebuild the calipers making sure you use some hi temp rubber grease on the slides, and get your master cyl honed or rebored and sleeved if necessary, with new piston and seals.. sounds expensive.. but you can get away with it for the price you would pay for some jap brakes alone..

my 2 c..

[Tom86]

I've got RB74 pads in my Jap brakes. They stop pretty well. I took 2 guys off supra forums for a ride in my car and they were shocked to see my car stop better than their supras.

You can have a drive of my car if you want.[/b]

I was going to get the RB74 brake pad but the guy that was selling it said it doesn't fit ae86 properly. Did you need to do any mod to make it fit? where did you buy yours from?

Where about are you? in Perth? If the JDM brakes are good then I will see if I can get one. Apparently I need to do a brake test when I get my car engineer. Need to make sure that it will pass first time http://www.ae86drivingclub.com.au/forums/emoticons/smile.gif

Thanks

[rxbenny]

I am very happy with my jdm brakes, but have never had adm brakes on my car so cannot compare.
the car stops much better than my series 4 rx7 ever did.

[mikewestphoto]

I'm in Balcatta, but I don't mind meeting up halfway. I got my pads from AJPS, yes, they did have to be 'modified' to fit but it's easy as. You got a bench grinder?

[Tom86]

I'm in Balcatta, but I don't mind meeting up halfway. I got my pads from AJPS, yes, they did have to be 'modified' to fit but it's easy as. You got a bench grinder?[/b]

What did you have to grind off the metal backing plate or the actual pad?
OK, I guess we can meet up on the weekend or something. I'll pm you later in the week.

Thanks http://www.ae86drivingclub.com.au/forums/emoticons/2thumbs.gif

[Tom86]

get your master cyl honed or rebored and sleeved if necessary,

my 2 c..[/b]

That is one of the thing i should have done before the ze conversion. I don't think you can take the master out anymore now, there is hardly any room in front of the brake master http://www.ae86drivingclub.com.au/forums/emoticons/sad.gif .

[mattysshop]

you don't need to take out the booster.. just the master cyl.. (metal bit with the resivoir on it and the lines coming out of it) booster stays put.. http://www.ae86drivingclub.com.au/forums/emoticons/smile.gif piss easy job.. just make sure you bleed it up on the bench befor you put it in.. much easier than trying to do it in the car..

[balistic]

Do DBA or RDA make a replacement rotor for the JDM vented set-up?

[ae71neo]

I have ADM 86 brakes on mine at the moment, and i have brought them to fade. But they are not good pads lol.

Im going to upgrade to JDM brakes as my rotors at the moment are on the verge of being to skinny. I have to buy new rotors, so i may aswell get some jap ones...

[Hen is a total nutcase]

Do you ever drive hard enough to get your current brakes to fade? If no then they are fine.

If yes then try some good pads and fluid in your current ADM setup.

If they still fade on you then JDM or bigger is a good option.

The only real benefit of bigger or ventilated brakes is fade resistance.

Hen

[RobertoX]

Do DBA or RDA make a replacement rotor for the JDM vented set-up?[/b]

rda make a vented and slotted rotor, i have 2 pr in stock as a matter of fact http://www.ae86drivingclub.com.au/forums/emoticons/smile.gif

[mikewestphoto]

I got tired of solidworks (uni assignment) so I had a play with paint.

Both the corners on the piston side pad need to have the corners ground down as below. It's not hard to figure out if you have it all.

[Blown86]

There's no way ADM brakes are up to stopping a 4agze Sprinter, doesn't matter what you do. More than 3 or 4 hard stops and brake fade starts and gets worse, best pads, fluid and discs don't help.

JDM brakes will be just ok for the road, if you don't do many hard stops. They are vented, but the actual mass of the brakes is too little to provide a decent heatsink. If you go to the track you'll be disappointed with JDM brakes.

For the price of doing a JDM install properly ie rebuilt or new parts etc, there's other options available that would be similar cost and far superior to JDM.

[ae86trueno]

I run standard JDM brakes in the rally car and they are fine, i dont get any fade whatsoever, and are more then fine for the track day, did 50 laps of wakefield without any dramas, and i wasnt exactly putting.

I run RBF600 brake fluid, slotted RDA rotors, and SBS carbon Ceramic Pads

Ben.

[Blown86]

What's your motor, horsepower, velocities?

Braking on loose surfaces doesn't translate from rally cars to black track or necessarily road. Less grip, speed and duration are standard on gravel.

[Gilly]

^^^^ read it again, he did 50 laps at a wakefield track day

[balistic]

I'll soon find out for myself - I'm probably going to run JDM brakes for starters on my 4AGTE Sprinter track car - also DIY S series locker and stock T50 box.

Who wants to place bets as to what lets go first? http://www.ae86drivingclub.com.au/dcimages/7/5/4/536981.jpg

[Blown86]

^^^^ read it again, he did 50 laps at a wakefield track day[/b]

So what?? You could do 500 laps doesn't mean shit! Horsepower and velocity determine breaking required, everything else being equal. A rally car set up for forest stages will not have the ultimate grip of a setup track car. Someone saying they've done laps doesn't mean they were on the limit or fast.

Didn't think I'd needed to explain that! http://www.ae86drivingclub.com.au/forums/emoticons/laugh.gif

[Blown86]

I'll soon find out for myself - I'm probably going to run JDM brakes for starters on my 4AGTE Sprinter track car - also DIY S series locker and stock T50 box.

Who wants to place bets as to what lets go first? http://www.ae86drivingclub.com.au/dcimages/7/5/4/536981.jpg[/b]



Brakes FTL... http://www.ae86drivingclub.com.au/forums/emoticons/smile.gif

[ae86trueno]

Ok engine is a hevily worked rally trim 4AGE (90+ KW ATW) dont know haw fast we were going at the end of the straight but on the limiter hard in 4th through the kink at the end of the striaght, so probably around the 140/150 mark.

The Carbon Ceramic pads are designed to work up to 700 deg, and the brake fluid up to 600 deg, so even with small disks i dont tink ill reach those figures in a hurry.

also have you ever driven a dedicated rally car with new Tyres, the grip level is more then what you would think. I know not as much a when im on Tarmac but definatly more then your average road car.

Ben.

[Blown86]

Yeh I've driven the odd rally car, dirt and track. The grip is always surprisingly more than you'd expect. http://www.ae86drivingclub.com.au/forums/emoticons/smile.gif

My reference is a NA Sprinter with 110 KW ATW about 180/190km/hr is about borderline for a similar braking system to yours.

A 4agze with similar power atw but ~ 50% more torque will kill jdm brakes, the torque gets the car up to speed nicely. Of course a 4agze carries a bit more weight as well.

It's hard to run 700 degree pads on the road, good practice for left foot braking!! http://www.ae86drivingclub.com.au/forums/emoticons/biggrin.gif