ST brakes, please help !!! Options

[yagamius]

I've been reading about the braking stuff and many many swaps for the rear drums to discs, here I've found people who change the hole system and some others that found a way to do it without change a thing.
so my questions increase instead of be resolved, couple of days ago I take off the drums to a regular clean and start searching to see if its possible to just put some rear Rotor from a Celica that will fit right away in my hand brake system.

some say about ST165 some others say ST185, and many others make a swap for a GT application.

I know that if there a way to fit a rear rotor to the actual system I'll need to find a way to put the caliper brace and the caliper.

so is there a way to do this, or if the GT rotor from 6th Gen will fit (i don't think so cuz it looks smaller).

by the way my Celi is an AT200 Celica ST 1994

checking the web many people sell both front and rear rotors, can I use the front rotors from ST185 with my actual calipers ?

This post has been edited by yagamius: Jun 29, 2009 - 10:19 PM

[vi-tuyen]

I have same concern, but one more thing is the brake pressure for the6th gen ST rear drum is 551 psi and for the 6th gt (5sfe) rotor is 645 psi, there is almost 100 psi in different. i think the old proportioning valve need to be change for the rear caliper car model because it not enough pressure for the caliper to work properly. I say it will works but it's not really enough pressure to force the brake piston out to clamp the rotor. that's is my opinion, because I check TIS (Toyota repair manual web site) they say if the brake pressure is incorrect, change the proportioning valve or else it is not function properly. i am planning to do this too.

Anyone correct me if I am wrong.

This post has been edited by vi-tuyen: Jun 29, 2009 - 8:56 PM

[GriffGirl]

You don't have to change the prop valve, your brakes will still work fine if you don't. If you can source a prop valve from a GT, then go for it. Tons of people who've done this conversion, myself included, did not change the proportioning valve and aren't having any issues with braking.

[yagamius]

You don't have to change the prop valve, your brakes will still work fine if you don't. If you can source a prop valve from a GT, then go for it. Tons of people who've done this conversion, myself included, did not change the proportioning valve and aren't having any issues with braking.

but what about the size of the actual drum (st) vs the drum from the rear rotor of the 94-99GT or ST185

[DEATH]

You don't have to change the prop valve, your brakes will still work fine if you don't. If you can source a prop valve from a GT, then go for it. Tons of people who've done this conversion, myself included, did not change the proportioning valve and aren't having any issues with braking.

but what about the size of the actual drum (st) vs the drum from the rear rotor of the 94-99GT or ST185

we don't have drums - that's why you want ours remember?

[GriffGirl]

You don't have to change the prop valve, your brakes will still work fine if you don't. If you can source a prop valve from a GT, then go for it. Tons of people who've done this conversion, myself included, did not change the proportioning valve and aren't having any issues with braking.

but what about the size of the actual drum (st) vs the drum from the rear rotor of the 94-99GT or ST185

GTs have rear disc brakes, not drum brakes. So you need rotors, not drums. Rotors can be found VERY easily by searching/asking for rotors for a (your year) GT.

[yagamius]

You don't have to change the prop valve, your brakes will still work fine if you don't. If you can source a prop valve from a GT, then go for it. Tons of people who've done this conversion, myself included, did not change the proportioning valve and aren't having any issues with braking.

but what about the size of the actual drum (st) vs the drum from the rear rotor of the 94-99GT or ST185

GTs have rear disc brakes, not drum brakes. So you need rotors, not drums. Rotors can be found VERY easily by searching/asking for rotors for a (your year) GT.

Yes, there some misunderstanding from my question, I mean the hand brake little drum that the rear rotors have right, so my question is, these hand brake drums are smaller o are the same as the ST model ?
or are the same size of the ST165 or ST185 or ST205 ?

I'm worry about this little hand brake drum.

[GriffGirl]

When you get your GT brake assembly, you should also get with it the emergency (hand brake) brake assembly. The brake shoes for the emergency brake go inside the rotors - the rotors for the rear brakes of a GT are designed with a center "drum" for exactly this purpose.

The reason you will need the emergency brake assembly from the GT car is because they fit inside the rotor hub differently than the ST ones fit inside the stock drums. You will also need the cables that run from the emergency brake shoe assembly to the cable that comes off of the brake lever underneath the car.

[yagamius]

and there is no rotor for celica that fits right in the stock ST model, like the ST185 or ST205?

one more thing if I'm not able to find 6gen Calipers can I use 90-93 all-trac Calipers (ST185) or is better to use all-trac rotors

This post has been edited by yagamius: Jul 1, 2009 - 4:54 PM

[GriffGirl]

No you have to change out the whole assembly, otherwise everyone would just stick rotors on

IDK if 5th gen calipers fit, you'd have to research that. I really think you're better off just buying the entire rear brake setup off of one car rather than piecing it together though. You're apt to run into more problems if you piece it together like that.

Here ya go, it's a winner!
http://www.6gc.net/forums/index.php?showto...mp;#entry782419

This post has been edited by GriffGirl: Jul 1, 2009 - 5:57 PM

[yagamius]

No you have to change out the whole assembly, otherwise everyone would just stick rotors on

IDK if 5th gen calipers fit, you'd have to research that. I really think you're better off just buying the entire rear brake setup off of one car rather than piecing it together though. You're apt to run into more problems if you piece it together like that.

Here ya go, it's a winner!
http://www.6gc.net/forums/index.php?showto...mp;#entry782419

Hey GriffGirl I own you a million for that, i was trying to find a proper solution for this conversion....

[yagamius]

the parts are coming to town is there any part beside Matt sell to me that I need to consider

This post has been edited by yagamius: Jul 6, 2009 - 6:46 PM