Brake Rotor Size Options

[Ruroniarc]

I will warn you, I have done searches, but I haven't quite found exactly the information I need.

I want to know if the ST front discs are the same size as the GT rear discs. I'm looking to do a drum to disc conversion, but I want all new rotors and pads. I don't know if I need two different rotors or not.

Also, for the parts that I need... I know I need all of the mounting brackets and the calipers and the e-brake cables. Do I need anything else? If I just get the mounting brackets and e-brake cable from a junk yard, can I order OEM replacement calipers fairly cheap?
Did more research, need calipers and backing plates. My other question still stands.

This post has been edited by Ruroniarc: Jul 30, 2009 - 12:41 PM

[Galcobar]

Pulled this list together when I was working out my own rear disc brake conversion -- though mine was for a fifth-gen.

For 5SFE-powered Celicas:
Front rotors
90-91 255 mm diametre, 22 mm thick, 54 mm centrebore
92-93 277 mm, 25 mm, 54 mm
94-99 275 mm, 28 mm, 55 mm

Rear rotors
90-93 269 mm, 10 mm, 54 mm
94-95 269 mm, 10 mm, 55 mm
95-99 269 mm, 9 mm, 55 mm

For 4AFE-powered Celicas
Front rotors
90-91 238 mm, 22 mm, 54 mm
92-93 255 mm, 25 mm, 54 mm

Unfortunately, I couldn't find rotor sizes for the 7AFE but when it comes to front and rear discs on Celicas there is one major difference: the fronts are ventilated while the rears are solid (note the thickness of the front versus rears for the 5SFE rotors). They are not interchangeable.

This post has been edited by Galcobar: Aug 1, 2009 - 2:00 AM