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Will I kill myself if I don't upgrade my brakes?

studmuffed

Member
Joined
Nov 16, 2017
Location
Va
All jokes aside, I have been working the clapped out stock brakes on my 240+T a little too hard. I've never had any serious brake fade, but the stories scare me. :rofl:

My original plan was to save up for a while while on stock brakes and then upgrade to RX7 or Cadillac calipers in the front. Do you guys think if I get new stock rotors, decent metallic pads, and DOT4 fluid it will be enough for now? I'm probably making about 200hp and use the car mostly for spirited driving but plan on autoX in the future.

I've been looking into better pads and rotors with the stock system (greenstuff) but damn they are expensive, ideally I'd like to spend under $100 until I get the funds for a big brake kit.
 
Agreed! I’ve raced on Volvo pads and they’re decent, but don’t last long in a racing environment. On the street, they’re fine.
 
Neither will happen on the street unless you are a total maniac. Autocrosses are too short for brake fade, and you would have to do it all the time to shorten the life of the pads.
 
Don't last long meaning brake fade or short lifespan?
No fade with ducting in our endurance racing situation, just only 7-14 hours before the pads are gone depending on the axle and race track in our use. Put in some good DOT4 fluid and call it good. We use ATE Typ200 as it has a higher boiling point without being too crazy like the race spec 600 degree stuff. This is the type of use I?m referring to:

https://youtu.be/KSGnSB7deC0

Neither will happen on the street unless you are a total maniac. Autocrosses are too short for brake fade, and you would have to do it all the time to shorten the life of the pads.
Agreed.
 
No fade with ducting in our endurance racing situation, just only 7-14 hours before the pads are gone depending on the axle and race track in our use. Put in some good DOT4 fluid and call it good. We use ATE Typ200 as it has a higher boiling point without being too crazy like the race spec 600 degree stuff. This is the type of use I’m referring to:

https://youtu.be/KSGnSB7deC0

Agreed.

Good to know! I'll probably end up taking my brick out at VIR at some point since I work there sometimes, so it's nice knowing that the stock calipers can hold their own during track use.
 
All jokes aside, I have been working the clapped out stock brakes on my 240+T a little too hard. I've never had any serious brake fade, but the stories scare me. :rofl:

My original plan was to save up for a while while on stock brakes and then upgrade to RX7 or Cadillac calipers in the front. Do you guys think if I get new stock rotors, decent metallic pads, and DOT4 fluid it will be enough for now? I'm probably making about 200hp and use the car mostly for spirited driving but plan on autoX in the future.

I've been looking into better pads and rotors with the stock system (greenstuff) but damn they are expensive, ideally I'd like to spend under $100 until I get the funds for a big brake kit.

rx7 upgrade was designed to eliminate sprung weight and make the system more simple

it's pretty much the same stopping power


quit driving like a moron and you'll be fine on stock stuff
 
quit driving like a moron and you'll be fine on stock stuff

What if I dont wanna quit driving like a moron? :lol:

Good to know about the RX7 junk tho, heard they shed heat better but I guess Cadillac or nothing?
 
I have R brakes on my 79 242, the brakes have way more hp than the motor does. And I have to have huge rims on the car. R brakes are the easiest upgrade, and way more braking than you need. It was a totally useless mod, but I was going to LS swap the car, so that is why they are on there.

The cheapest way to do it is STS brackets, R calipers, Powerstop rotor and pad kit for a 2006 S60R, Mustang GT master cylinder I forget the year but can tell ya tomorrow if you care, a couple plugs for the distribution block, and a length of brake line with some extra fittings for the stuff that will be jammed up. Plus a set of 17" or bigger rims. Plan on $2000 and you will be ok, have some change left over if you do it yourself.

Better to just make sure the factory setup is %100. Remember your braking is only as good as your tires. Big brakes can lock up the stock tires fast, then you are sliding into whatever is in front of you.
 
Stock brakes, good pads, good fluid, good tires. The braking systems in these cars are good if you take care of them. Autocross doesn't load the brakes very seriously, nor does spirited street driving (unless you're doing 90->30 repeatedly downhill on a mountain pass)
 
In 1991 I bought all new brakes for the V8 Wagon [350+HP] from Volvo. Rotors [vented front],pads, and calipers. Cross drilled all the rotors [120 holes per rotor]. They are still on the car today 275k miles later, rear pads will need to be changed soon.
 
When updating front brakes remember also update rear brakes. If piston and disk diameters are off-balance, your front wheels are tap-dancing at the verge of locking and rear wheels are barely doing nothing. And no, pressure regulator will not help in this case.
 
Stock brakes, good pads, good fluid, good tires. The braking systems in these cars are good if you take care of them. Autocross doesn't load the brakes very seriously, nor does spirited street driving (unless you're doing 90->30 repeatedly downhill on a mountain pass)

This. I haven't had any problems with OE pads and good fluid. My brakes will start smoking before they fade now.
 
^+1. Old fluid was cooking almost instantly on the track, but with fresh fluid the stock brakes did surprisingly well. Braided lines also made the pedal feel much better than the old lines.
 
I got 5l of Pentosin LV brake fluid from Rock auto for $30 when I changed my brake octopus, it's good for >509F. Never had a problem with this fluid at autocross or time trials at the track.
 
Alright thanks for all the info guys, I'll probably just get new metallic pads, new rotors, and flush with some good DOT4 fluid. Might do braided lines, greenstuff pads, and some ducting if I am still working the brakes a little too much.
 
The stock 240 brakes are not lacking in power, they are lacking in heat management. The RX7 calipers being aluminum will help with the heat aspect. Big brake kits help my using components that don't get as hot, or can handle being at higher temps better.

Good pads and good fluid will get you a ways with the stock calipers. If you're doing track days, and are at a track that uses the brakes, expect the pads to wear down to the metal after a few hours of track time (just like KLR142 mentioned). Brake pads work pretty well when it's metal on metal, they just get really hot and boil the fluid at the least opportune time.
 
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