oem dual piston calipers?wtf?

[dsm_cruiser]

my buddy has a 88 supra turbo that came with dual pistons calipers. I've never heard of mk3 having dual piston calipers? could it be an aftermarket? i'll try to get some pics of it.

[Kenshiro]

sweet, get some pics.

[Jeff Lange]

Probably from some other car and were retrofitted to the Supra.

[selz202]

Na mk4 calipers would be my guess...

[HamsMKIV]

You know once long ago it was speculated that the 4 piston calipers from the early 90's 4-runner would bolt up. I have to admit that I looked at calipers on a 4x4 Tacoma, and they looked really close under visual inspection. Always wanted to try but never did.

Again, this is merely speculation from things I've read in the past, nothing more.

- Chris

[hachibill]

i was wondering the same thing myself, or later model LS430's had 4 piston fronts as well that might work. junk yard brakes FTW!

[HamsMKIV]

Well I wanted to try a set of Tacoma 4 pisont calipers, but I didn't want to spend $80 on them and they not work.

[flubyux2]

boy those were the good ol days. i remember that thread too. that was before you had the 1j too, wasnt it.

if im going to go thru the hassle of making an adaptor to fit larger brakes, im going all out and putting wilwood SL6R's on there... i hear they have a new design w/ dust boots so you dont have to rebuild them every season.

[Wolfpac251]

Wouldnt that be something you might cheeply find in the junk yard?

[Poodles]

bump for pics

[dsm_cruiser]

dual pistons
http://i38.photobucket.com/albums/e101/dsm_cruiser/DSC06621.jpg

stock
http://i38.photobucket.com/albums/e101/dsm_cruiser/DSC06620.jpg

both
http://i38.photobucket.com/albums/e101/dsm_cruiser/DSC06619.jpg

they bolt right up.. just wonderin if anybody knows what kind of calipers these are?

[HamsMKIV]

Dunno, those might be older 4-runner calipers, but I honestly don't know for sure. That's pretty cool that you found them.

- Chris

[selz202]

Interesting... im almost positive hams is right about it being older 4 runner/ 4x4 calipers...

Is there a part number stamped on the caliper anywhere?

[turbosupra]

Those look like the japanese mk4 dual piston calipers I have

[Supra_Class]

What about the break pads, do they fit both? If not then finding the idenity of the calipers would be a must.

[spinningheadboy]

I'm interested also.....nice find....part numbers?

cwd

[dsm_cruiser]

What about the break pads, do they fit both? If not then finding the idenity of the calipers would be a must.


The stock brake pads fits right in. no worrys about looking for a different set of brake pads. i'll see if i can get the parts #.

[C44]

Get those numbers man :) Also could someone point me to that oldschool thread about fitting brakes from a 4x4 ?

[dsm_cruiser]

not sure where the part# is at so here's some more pictures. hopefully you guys know where it's at.


http://i38.photobucket.com/albums/e101/dsm_cruiser/Picture256.jpg

http://i38.photobucket.com/albums/e101/dsm_cruiser/Picture257.jpg

[3p141592654]

According to a thread on that other forum, this is a 91 previa caliper (ABS 4 wheel disk option).

By the way, I noticed Ksport is selling an 8 piston with 13inch rotor brake kit for the mk3 now.

[dsm_cruiser]

what other thread?

[ItsNOTaSoarer]

those look identical to SC300 stock brakes....


A.K.A. N/A MKIV supra brakes....

[tubbie]

what other thread?

He's talking about the other thread on the other forum about supras.

Caliper piece is the same as MK4 NA brakes, but the mounting bracket is different.

[dsm_cruiser]

those look identical to SC300 stock brakes....


A.K.A. N/A MKIV supra brakes....


do those bolt up? the ones i have bolts right up and uses the same brake pads. Why isn't this a popular upgrade?

[tubbie]

As with the discussion on the other forum......

The stock caliper is plenty strong enough for the rotor size. You can easily lock up the front brakes with the single caliper. Having the twin piston caliper will not help stop any better other than maybe more even pad wear.

[ItsNOTaSoarer]

do those bolt up? the ones i have bolts right up and uses the same brake pads. Why isn't this a popular upgrade?

idk, they come on my car stock

[MK3Brent]

Wow, I'm interested in anymore info to this.

Very cool stuff.

[Import_Eve]

that look intresting.... there are two previa in the junk. I might go check it out. :bigthumb:

[dsm_cruiser]

that look intresting.... there are two previa in the junk. I might go check it out. :bigthumb:


some say it's from a toyota 4x4 truck, some say it's from a privia, and some say it's from a na mkiv supra/sc300.. i don't even know now.

[3p141592654]

Well, here is the Previa p/n and illustration. I would call it a match!

47730-28200 $343 new from Champion :rofl:

Its certainly possible that it is also used on the other cars mentioned. Toyota often does that, but that part number only maps to 91-96 Previas

http://img74.imageshack.us/img74/5180/previacaliperla8.jpg (http://imageshack.us)

[3p141592654]

The MK4 N/A looks similar but has p/n 47730-14281. No way to tell if they are the same.

[Import_Eve]

some say it's from a toyota 4x4 truck, some say it's from a privia, and some say it's from a na mkiv supra/sc300.. i don't even know now.

oh well a caliper is only $5 so yah. Won't hurt to try, but it is getting way to cold to go to the local junk yard.

[spinningheadboy]

I'm going to guess the Previa, because I've seen some interchangeable brake parts between the two models when on Ebay. I'd post a link, but it's not allowed.

cwd
Boise

[miekedmr]

The stock caliper is plenty strong enough for the rotor size. You can easily lock up the front brakes with the single caliper. Having the twin piston caliper will not help stop any better other than maybe more even pad wear.

Did the previa (or whatever they're from) have a bigger rotor, then? I'm guessing it didn't, and if not, why the two piston caliper?

I'm sure there's some advantage, but you may be right in implying its not worth buying a set of these to replace the stockers.

[miekedmr]

They're $100 per side at autozone (no core,) p/n's 079-0989 and 079-0990

or $68 with a $40 core at thepartsbin.com or autopartswarehouse.com

[williamb82]

dual pistons
http://i38.photobucket.com/albums/e101/dsm_cruiser/DSC06621.jpg

stock
http://i38.photobucket.com/albums/e101/dsm_cruiser/DSC06620.jpg

both
http://i38.photobucket.com/albums/e101/dsm_cruiser/DSC06619.jpg

they bolt right up.. just wonderin if anybody knows what kind of calipers these are?

they look like alltrac calipers

[SupaMan]

anybody know what year previa,model and if its the AWD or RWD version? i found these but i dunno if their it they look very simalar tho and i might try this out to see if it does bolt right up.


EDIT: i noticed those calipers are for the ABS equppied models would it make a diffrence?


EDIT: that page doesnt work that i posted so heres the pic and info for them.

http://www.partsamerica.com/product_images//img/a1c/191584.jpg

Vehicle: 1992 TOYOTA PREVIA LE
Engine: Rear Wheel Drive L4 2.4 Liter FI

Caliper W/Installation Hardware: Reman. Front Right; W/Abs; OE Metal Piston; Supplied w/o Mounting Bracket

[miekedmr]

It's only on the model with ABS AND 4 wheel disc brakes... It appears there was an ABS /w rear drums option that didn't have the dual piston calipers.

[YaosAuto]

hey, think about it. do we have this dual caliper in the front for stock 91 supra? if toyota didnot wanna do it. why do we wanna do it? make sure its a better upgrade before you do it.

[dsm_cruiser]

hey, think about it. do we have this dual caliper in the front for stock 91 supra? if toyota didnot wanna do it. why do we wanna do it? make sure its a better upgrade before you do it.


because it looks cooler and it's unique. it aslo came with the car so it's a freebie for me. :)

[tsuper92]

it seem's like they put them on vehicle's that where heavy(previa van,4x4, and sc300)maybe they will put more even pressure across the width of the pad building more heat

[dsm_cruiser]

it seem's like they put them on vehicle's that where heavy(previa van,4x4, and sc300)maybe they will put more even pressure across the width of the pad building more heat


? so people with dual or even 4 piston calipers should convert to single piston because it causes less heat? I don't think the supra is a light car either. :ugh2:

[SupaMan]

previa van weights 3800+lbs dry ive been looking almost all night on google for 60-0 braking distances but i cant find any im gonna keep looking and see im not gonna spend the money on them if i dont get better performance but this is looking very promising :)


+1 to the supra owner who made this thread! :)

[tsuper92]

? so people with dual or even 4 piston calipers should convert to single piston because it causes less heat? I don't think the supra is a light car either. :ugh2:
i was under the impression friction cause's heat and that is what help's you stop.maybe i worded that kinda weird,but i meant it in a positive way.figuring it would be better even with the same size rotor

[SilentRunner007]

i check the pic posted by dsm_cruiser and looked up the casting number on it.

as williamb82 said that is a all-trac caliper. more specifically it is a right front caliper for a 88-89 celica all-trac.

[adam pecush]

excellent.

[tekdeus]

In my mind, wouldn't a single piston caliper put more pressure on the center of the pad, and less on the edges as the pad flexes slightly??? I can't help but think that the more pistons the better, hence BBK's having 4-6 pistons.

Are the rears also dual piston? Would this upgrade require adjusting the hydraulic pressure between the front and rear brakes?

[TealmetalicDream]

i was under the impression friction cause's heat and that is what help's you stop.maybe i worded that kinda weird,but i meant it in a positive way.figuring it would be better even with the same size rotor
Heat causes brake fade. Thats why they make slotted and drilled rotors to keep everything cool.

[adam pecush]

In my mind, wouldn't a single piston caliper put more pressure on the center of the pad, and less on the edges as the pad flexes slightly??? I can't help but think that the more pistons the better, hence BBK's having 4-6 pistons.

Are the rears also dual piston? Would this upgrade require adjusting the hydraulic pressure between the front and rear brakes?

the theory behind more, smaller pistons is that you are able to build a higher braking force with less pedal pressure, thus enabling a higher braking force to be built.

[SupraVirtu]

bump!

[my87tbo]

I do think that also when there are more pistons the pressure on the pad will have a better distibution of force. as for heat the two will disapate heat quicker than the one.oh and you can say to everyone that you have dual front calipers =jdm :1poke:

[wangan91]

I just called my boy at toyota and the reman'd ones are like 86 bucks a piece and to me that is well spent money so +1 to the guy that started this thread. I will have these.

[mazzer]

Ibnogainisseen

[Midnight Dorifuta]

Wow. I neew new calipers ALL AROUND so perhaps looking into these fronts would be a smart move.

However, I wonder if dual piston front + oem rear would be a bad idea.

[mazzer]

you guys really think you're smarter then toyota?

[wangan91]

not smarter just more developed at this point than they were in 89-92. I mean they did send out the cars with 52ft/lbs torqued headgaskets didnt they. They also werent planning on having the car modified to 4-500 horsepower and being driven hard all the time like most of the cars on here are so i think it would be a smart move to use dual pistons to get even pressure applied to the brakes along with vented or slotted disc's when stopping from higher speeds. Just my .02cents

[Midnight Dorifuta]

So it's the Celica Alltrac caliper. And it'll fit the stock pad?

-just double-checking on his info-

[supraguru05]

just to make a couple points about racing brake systems. the beenfit of multiple piston calipers is not that they distribute the force evenly it is simply that you get more piston area. piston area is all the matters in a caliper it determines the braking force line pressure and pedel travel. that being said the more pistons the caliper has the bigger the pad which heats up more of the disc causeing (in racing conditions) more heat to form on the disc. in race cars this can be easily dissipated by using thermal pastes air ducts and carbon carbon discs. main point being adding the dual piston calipers to the front will make the front brakes get hotter under racing. our dust sheilds are already vented but i know that during autocross and track days that my car is already front brake bias and already get really hot. so i dont plan on "upgradeing" to these calipers. also you need to know the internalls of the caliper can be different to allow for more heat insulation

[3p141592654]

More heat will only occur if more kinetic energy from the car is converted to heat by the brakes. That's a function of your driving, not the caliper design.

The pads on the two piston calipers are pretty near the same size as the stock pad. So, there will be no difference in rotor shrouding and rotor cooling will be unchanged.

The real benefit here will be the more uniform pressure across the pad surface that the two pistons give relative to one larger single piston. Our pads are far from square (~ 2:1 aspect ratio), so a single piston only pushes on the center of the pad, and the pad backing stiffness is all there is to get pressure to the edges of the pad.

With two pistons, the aspect ratio of the piston is much closer to the pad, so the pressure is more uniform across the pad, which will improve the effective pad area of the brakes. You will get more stopping power for less line pressure.

That is why, on the 4000 pound Previa (5000lb loaded with 7 people), they went with the two piston design.

In 83-86 when they did the bulk of the development of the mkIII Supra, they did not have the 2-piston caliper available, otherwise they might have used it.

[supra87t3/t4]

While that does look like an ST165 (88-89 celica alltrac) caliper, keep in mind that those cars use 14" wheels, so the disc size is quite a bit different. I got rid of all my alltrac spare parts, so I can't check, but I did pick up a pair of loaded reman calipers from autozone for right around $100.

[Jeff Lange]

That is why, on the 4000 pound Previa (5000lb loaded with 7 people), they went with the two piston design.

Not all Previas have the dual-piston calipers however.

[3p141592654]

Yeah, even today the low-cost Sienna CE has drum brakes on the rear. Then and now, you have to pay extra to get decent brakes.

[Alister_Rizen]

Can some one tell me exactly what caliper that is??

Someone said All-trac off a 88-89 Celica.

Someone said Previa ABS 4-Wheel disk brakes.

Which one is it??

Thanks

_Ian

[Sar-Supra]

Yeah, I´d like to know that, too.

And which year.

-Sar

[tekdeus]

This makes sense to me. But if you just upgraded the fronts, would they end up braking harder than the stock mk3 rears? Under maximum braking, would the fronts lock while the rears don't? If so, how would you equalize it?


More heat will only occur if more kinetic energy from the car is converted to heat by the brakes. That's a function of your driving, not the caliper design.

The pads on the two piston calipers are pretty near the same size as the stock pad. So, there will be no difference in rotor shrouding and rotor cooling will be unchanged.

The real benefit here will be the more uniform pressure across the pad surface that the two pistons give relative to one larger single piston. Our pads are far from square (~ 2:1 aspect ratio), so a single piston only pushes on the center of the pad, and the pad backing stiffness is all there is to get pressure to the edges of the pad.

With two pistons, the aspect ratio of the piston is much closer to the pad, so the pressure is more uniform across the pad, which will improve the effective pad area of the brakes. You will get more stopping power for less line pressure.

That is why, on the 4000 pound Previa (5000lb loaded with 7 people), they went with the two piston design.

In 83-86 when they did the bulk of the development of the mkIII Supra, they did not have the 2-piston caliper available, otherwise they might have used it.

[wangan91]

Im pretty sure your breaking power is already front bias as it is. Like 70% of your stopping power is in the front anyways . The only way to "equalize " your breaking power is to get brake distribution controller and that shit is hella expensive.

[Suprawill1]

Can some one tell me exactly what caliper that is??

Someone said All-trac off a 88-89 Celica.

Someone said Previa ABS 4-Wheel disk brakes.

Which one is it??

Thanks

_Ian

Everything was speculation till william82 traced the casting #s to the all-trac.
I'd go with that.

The biggest advantage for me in having this style caliper is that the pad replacement is much easier. Even if the performance ends up being the same, this alone is worth it to me. Mind you, the performance of our one piston is very good.
Just not as efficient as a multi piston.

[supra87t3/t4]

Pad replacement is essentially the same. It's still a sliding type caliper both pistons are on the inside pad.

[Suprawill1]

Pad replacement is essentially the same. It's still a sliding type caliper both pistons are on the inside pad.

Maybe I have yet another type of caliper on mine then because the 1 & 2 piston types shown in this thread are 2 piece and mine is not. My back ones are, and you can replace the pads without pulling the main caliper support. The center portion with the piston can be angled up pivoting on the back bolt so you can easily change the pads but on my front, I have to pull the whole caliper as a 1 piece and have it dangling from the brake line. This style is not nearly as easy as changing the back.

[3p141592654]

Everything was speculation till william82 traced the casting #s to the all-trac.
I'd go with that.

The biggest advantage for me in having this style caliper is that the pad replacement is much easier. Even if the performance ends up being the same, this alone is worth it to me. Mind you, the performance of our one piston is very good.
Just not as efficient as a multi piston.

Look at post #30

[supraguru05]

Im pretty sure your breaking power is already front bias as it is. Like 70% of your stopping power is in the front anyways . The only way to "equalize " your breaking power is to get brake distribution controller and that shit is hella expensive.

or ditch abs and get a porportioning valve

[Suprawill1]

Look at post #30

That's just Previas p/n and illustration and was visually matched. It may be the same, as the caliper in question might have been used on multiple vehicles. The casting # on the caliper in the original pic listed as the All-Trac. It has been purchased and fit.

[Poodles]

brake bias is controlled through your ABS...so your fronts won't lock anyways. ABS does more than just stop your wheels from locking, it allows the rear brakes to work better and keep the car stable

also, they could be off the all-trac AND the previa... remember, chevy isn't the onyl car maker that uses the same parts on many different cars. It's cost effective to do it that way.

also, multi piston systems have their limits. Look at the discussions ont he 6 vs 8 piston calipers on the MKIV to see that the 8 piston are marketing and nothing more (6 piston works better)

[supra87t3/t4]

I just found these pics on my phone, not sure why I took them, but these are the calipers I bought for my 88 celica alltrac (ST165) they were ~$100 for the loaded pair from autozone.

Hmmm, can't upload the files, WTF?

[limequat]

Here's some facts on the Previa:

Standard 14" wheels, no ABS, 10" rotors.
Optional ABS, 15" wheels, 4wd (read: heavy), 10.6" rotors.

My guess is that they wanted to package a larger brake system for the 4wd and still get them to fit under the stock 14" wheels.

Note that the "ABS" previa rotors are 10.6 compared to 11.8 on the Supra.
I think that the only advantage of Previa calipers on a Supra is that you might be able to run 15" wheels.

[Suprawill1]

So, do you think that the pad area is smaller? I like being able to change the pads without removing the whole caliper like I have to.

[hachibill]

those twin piston calipers look like infinity j30/q45 calipers. the same company makes all that stuff anyways so its all pretty much the same. the only real part you need is the caliper bracket.


but good find anyways!!

stock mk3 brakes suck. period. anything is an upgrade

[limequat]

Another point about dual-piston calipers:
Dual pistons will inherently have less flex at the bridge because the force is closer to the bridge. Assuming comparable design, dual pistons will have better brake feel.

[csnow]

I don't have ABS on my 89. Will these work since they are for ABS?

[Suprawill1]

My guess would be definitely considering they bolt up and interface with the brake line. ABS is all said and done before that point.

As long as the dual calipers have the same area as the single, they look much better on paper, mechanically and at the pressure areas. Less pad flex and less pad hot spot in the center. I think the original Supra calipers work great considering what they are and the weight of the car. Anything else OEM could be an improvement. You can always improve with aftermarkets but I wouldn't compare them with OEMs because that would be an unfair comparison.

[csnow]

I was thinking they would fit as well. I actually have the brackets to put 300z calipers on it, but I am thinking of selling them.

[pramiscal]

You wrote that the castin numbers match but on post 17, the casting number in the pic is 2304, not 2403...please advise




RAYBESTOS Part # FRC10252 {Friction Ready}
Front; w/ ABS; w/ Rear Disc Brakes; w/ 2 Piston Caliper; Casting #2403; SEMI-LOADED LEFT CALIPER ASSEMBLY $40.79 after core of $30 or $70.79 each side

Rebuilt sets on rockauto. Casting number matches. This is listed for a 1992 Previa DLX.

I'm going to get a set for my rebuilt subframe. Nice find to the original poster!

CWD

[nsainjoe]

You know once long ago it was speculated that the 4 piston calipers from the early 90's 4-runner would bolt up. I have to admit that I looked at calipers on a 4x4 Tacoma, and they looked really close under visual inspection. Always wanted to try but never did.

Again, this is merely speculation from things I've read in the past, nothing more.

- Chris

Hey bro...i heard bout that too..on the 4 runners calipers on supra but my question is that will the rotors need to be changed or can we still run on stock rotor spec?

[JtWo]

sorry to bump an old thread...but has anyone tried this?

[86.5na t supra]

im big into the 4wd toyotas, and its deffinantly not a toyota 4runner caliper, they look like this
http://i281.photobucket.com/albums/kk222/yota79crawler/4runnerbrake.jpg

[charlesshen]

Can some one tell me exactly what caliper that is??

Someone said All-trac off a 88-89 Celica.

Someone said Previa ABS 4-Wheel disk brakes.

Which one is it??

Thanks

_Ian
it official ther from an All-trac off a 88-89 Celica
Vehicle:
1989 TOYOTA CELICA ALL TRAC
Engine: L4 2.0 Liter Turbo FI
CARDONE Brake Caliper: Remanufactured; With Installation Hardware; Front; Right; OE Metal Piston; Supplied Without Mounting Bracket
advance autoparts
Retail Price: $121.15
Our Price: $79.99
You Save: $41.16
Core Charge: $30.00

[Ronnie4]

im big into the 4wd toyotas, and its deffinantly not a toyota 4runner caliper, they look like this
http://i281.photobucket.com/albums/kk222/yota79crawler/4runnerbrake.jpg

fyi, I tried to see if a 4 piston caliper from an 87 4runner would bolt onto my MKIII, it does not.

[Slow_Sc3]

it official ther from an All-trac off a 88-89 Celica
Vehicle:
1989 TOYOTA CELICA ALL TRAC
Engine: L4 2.0 Liter Turbo FI
CARDONE Brake Caliper: Remanufactured; With Installation Hardware; Front; Right; OE Metal Piston; Supplied Without Mounting Bracket
advance autoparts
Retail Price: $121.15
Our Price: $79.99
You Save: $41.16
Core Charge: $30.00

so has anyone swapped out to the all trac fronts to see if they helped slow are heavy pigs down better?


fyi, I tried to see if a 4 piston caliper from an 87 4runner would bolt onto my MKIII, it does not.


lol

ps: the front mkiv NA rotors and calipers dont fit you would have to change the whole hub assy over from the supra.

[supradjza80]

man there is a ton of mis information in this thread. Has anyone measured the piston sizes of the dual piston calipers? this is the measurement that is needed to know if this is a worthwhile modification. If the dual pistons area were the same overall area (both pistons added up) to the single piston stock caliper it would be a good modification due to the more uniform loading the pistons would put on the brake pad. If the piston area is different it will change pedal feel and braking power at a given pedal force input level.

But at the end of the day i think this is a total waste of time that could potentially ruin pedal feel ( if the piston area is way different then stock then you would want to run a different master cylinder to have the same firm pedal feel).

i guess i understand why people want to be different but I would opt for a "real" performance caliper (fixed mounting, inboard and outboard pistons) over the stock pieces instead of other sliding oem calipers.

[Slow_Sc3]

man there is a ton of mis information in this thread. Has anyone measured the piston sizes of the dual piston calipers? this is the measurement that is needed to know if this is a worthwhile modification. If the dual pistons area were the same overall area (both pistons added up) to the single piston stock caliper it would be a good modification due to the more uniform loading the pistons would put on the brake pad. If the piston area is different it will change pedal feel and braking power at a given pedal force input level.

But at the end of the day i think this is a total waste of time that could potentially ruin pedal feel ( if the piston area is way different then stock then you would want to run a different master cylinder to have the same firm pedal feel).

i guess i understand why people want to be different but I would opt for a "real" performance caliper (fixed mounting, inboard and outboard pistons) over the stock pieces instead of other sliding oem calipers.

http://i38.photobucket.com/albums/e101/dsm_cruiser/DSC06619.jpg

looks like more piston area to me :)

my lexus didnt have any problems when i went from the na caliper to the twin turbo caliper and the petal feel is fine at least a hell of alot better then the mk3.

[Divin' Devin]

So has anyone else tried this? I just bought a nice set of custom OEM calipers w/ drilled Brembo rotors for my MK IV w/ the full intent of installing all 4 of my original MK IV calipers (after chroming) on my MKIII; as it has no discs or calipers currently installed. I even just bought the Jake rear adapter kit, so I believe I'm set for the backs. This option looks like I could still keep my ABS and sell my front MKIV calipers and rotors. Are the discs same as stock as far as size and abs goes? It would be nice because I don't think I can fit the MKIV caliper under my 17" ADVAN SA3's +19 offset anyway

[Divin' Devin]

bump?

[Slow_Sc3]

Are the discs same as stock as far as size and abs goes? It would be nice because I don't think I can fit the MKIV caliper under my 17" ADVAN SA3's +19 offset anyway

if you want to sell the fronts i know someone who will buy them....

other then that you will need the whole mkiv hub and then you will have to machine the hub to fit onto the mk3 ( alot of work ).

i dont have a mk3 anymore but someone needs to get a caliper from advance auto and see what happens... if anything just return the caliper if it doesnt bolt up.

[Divin' Devin]

if you want to sell the fronts i know someone who will buy them....

other then that you will need the whole mkiv hub and then you will have to machine the hub to fit onto the mk3 ( alot of work ).

i dont have a mk3 anymore but someone needs to get a caliper from advance auto and see what happens... if anything just return the caliper if it doesnt bolt up.

That's what I am thinking I am going to do. went down to advance and w/no core to give them it was going to be about $130 each caliper. I was just going to machine the rotor and have an adapter fabbed for the mk iv fronts. Even with this done "right". I don't believe my wheels will have enough room for them. I would hate to put spacers on the front of a staggared set oif sa3's. kind of ruins the staggared look.
Let me get this done and I will post pics. I've got more pictures of both my supras than most people have of their whole family, including myself. I need to get some pics up anyway.
I have to get the brake issue solved quickly so it can go to body and paint without being bumped around due to not being able to stop.

[NashMan]

ok i am going to end this easy

the all track and the pervia are the same caipler as in size

all you do is reuse the stock mk3 braket that is all all ready tested this like 2 year's ago

used to work in a yard and i whent to the stagore room and there both the same computer says they can be swaped as well

so there you go is it an upgrade sure is it huge no

why did the mk3 not come with them if you look at the hole brake system as hole on stokc car it was fine and had no issue so why change it

toyota chnage stuff that need to be changed ie the sway bars in 91 are solid vs hallow plasitc end link's rear sub frame supports in 89 ect ect



so if it wqork why chnage it

[Divin' Devin]

thanks nashman, Looks like I will have dual piston on both front and back. This whole car is a mix and match w/ parts from virtually every year any way. I just love the fact that I don't have to disturb the ABS. I'll still let you guys know how this works out for me w/pics.

[simplistic]

this is intresting and yes ksport is selling a bbk now 8 piston 13 inch rotor i bleive 8 pistons on both frnt and rears with ss braided lines

[bgood]

I had Advance auto order a set of these two piston calipers so that I could measure them. It turns out that the two piston calipers have LESS area than the stock supra caliper. I forget the exact numbers, but the two piston calipers, with the two pistons combined, have about 3/4"of a square inch LESS than the stock supra piston.

[RockpaperSwoRD]

so in other words, there is no point in "upgrading" to these calipers? ive seen a few discussions about using 300zx brake calipers but it requires a special bracet to get them to fit.

[bgood]

so in other words, there is no point in "upgrading" to these calipers? ive seen a few discussions about using 300zx brake calipers but it requires a special bracet to get them to fit.

not even that there is "no point," more importantly, it is a DOWNGRADE. Less surface area=less braking force.

[supradjza80]

I had Advance auto order a set of these two piston calipers so that I could measure them. It turns out that the two piston calipers have LESS area than the stock supra caliper. I forget the exact numbers, but the two piston calipers, with the two pistons combined, have about 3/4"of a square inch LESS than the stock supra piston.

Well done, you are the thread winner! Somebody that actually knows whats going on.

[Gweetob]

Well done, you are the thread winner! Somebody that actually knows whats going on.

Ok but thier is still one thing i can think of.

The surface area is less you say. But if its very minimal, then what is more important, even pressure on the pad with two pistons, or a lil more surface area.? until someone tries it out we dont know how good it will work.. SOMEONE do it!

[Divin' Devin]

For those of you who are trying to do this mod, don't bother. I REPEAT, DON'T BOTHER! The guys at Grip and myself tried every way possible to get this to work. For the time and money spent on this I probably could have just got a bbk. I went back to stock for now. They are putting it to stock today I believe. For now I wll probablly put a proportioning valve on to compensate for the MKIV rear brakes since they are dual piston and I will be back to single on front for now. I don't know if that is necessary but seems logical to me.
I don't know how the guy in the first post got it to work but one of the most expensive parts is the $200.00 a piece brackets that hold the caliper you can ONLY buy from toyota. That's $400.00 plus the calipers and pads add roughly another $300.00, then you have the rotors almst another $200.00, then of course there is the labor. So if you think this is a money saving upgrade, it's NOT! I still want a bbk, but it will have to wait till next year now, after the car is repainted.
Hopfully I can take the rotors,and calipers back to autozone.

[bgood]

Ok but thier is still one thing i can think of.

The surface area is less you say. But if its very minimal, then what is more important, even pressure on the pad with two pistons, or a lil more surface area.? until someone tries it out we dont know how good it will work.. SOMEONE do it!

surface area is king. the only thing that the even pressure does for you is give you even pad wear from front to back.

[avcc11]

i met a guy in my town that said early 90's 4 runner calipers fit on the mk3

[90degee]

Sorry to revive an old thread but what slide pin was/is used the stock guide pin is huge but I don't want to order the bracket because its for a 10in. rotor. My other option was to drill out the hole but thats a last chance issue.