ST205 Front Brake Install, IS300 Rotors

Write ups and tutorials for maintenance and modifications.

ST205 Front Brake Install, IS300 Rotors

Postby FC Zach » Mon May 23, 2016 3:14 am

First off, all credit goes to Redsawn with his thread that was very helpful.
viewtopic.php?t=50455

*How I did my ST205 front brake caliper install using IS rotors. . .

-I purchased aftermarket drilled and slotted 2005 Lexus IS300 rotors and 54.1mm to 60.1mm hub bore rings (for centering rotors).
-Had a friend drill additional holes in the rotors for the 5x100mm bolt pattern.
Image

-Had same friend machine ~6mm from caliper mounting surfaces (pad side), leaving ~11mm of material.
Image

-Doing this centers the caliper for this rotor.
Before:
Image

After:
Image

-From a local hardware store I purchased four 12x1.25mm nuts and bolts, the bolts I got were too long so I cut them to ~35mm.
-The dust shields need to be trimmed by the top of calipers and may need manipulating around the ball joint area to clear the rotors. The outer edge of the shields may also need manipulating to clear the rotors. My trimming doesn't look pretty in this pic but this was a rough start, I cleaned it up later.
Image

-I had to go back and disassemble everything after noticing a faint grinding sound on the first test drive, I found that it was coming from a small section on each dust shield’s mounting plate. It will need to be removed since the inner diameter of the IS300 rotor is smaller and will grind against this surface if left untouched. I used an angle grinder.
Image

-I mounted the calipers with the nuts closest to rotor for ease of future servicing (caliper or rotor), easily accessible with pads removed.
Image

Tips:
-A telescoping magnet (pick up tool) works great for holding nuts in place between the hub and rotor while getting bolts started.
-I found in my searching that ST205 brake pads are the exact same as 93-98 Supra Twin turbo pads (Front: 04465-14150 and Rear: 04466-14040).

*Disclaimer: This is an example of how I how I completed my 205 front brake install, perform at your own risk. I do not assume any responsibility or liability for any damages. :wink:
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Last edited by FC Zach on Thu Jul 07, 2016 12:27 am, edited 2 times in total.
1992 Toyota Celica AllTrac
1987 Mazda RX7 Sport
1979 Yamaha G1A, rotary powered with Sachs KM24
1976 Hercules W2000, oil injected
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FC Zach
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Re: ST205 Front Brake Install, IS300 Rotors

Postby FC Zach » Wed May 25, 2016 9:38 am

I haven't thought to take a pic of the completed set-up till yesterday after washing the car, here's the fitment inside a 17" wheel.
Image
1992 Toyota Celica AllTrac
1987 Mazda RX7 Sport
1979 Yamaha G1A, rotary powered with Sachs KM24
1976 Hercules W2000, oil injected
User avatar
FC Zach
Club Member
 
Posts: 800
Images: 9
Joined: Mon May 20, 2013 7:43 am
Location: Eagleville, TN

1992 Toyota Celica

Re: ST205 Front Brake Install, IS300 Rotors

Postby DonMuscles » Wed Jul 06, 2016 9:22 pm

This is wicked!

Definitely doing this to mine at a future date.

Many thanks.
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Re: ST205 Front Brake Install, IS300 Rotors

Postby quieter » Thu Jul 07, 2016 8:25 pm

what's the distance between the disc and the ball joint in the front? nice write up!
1990 toyota ST185 with st205 goodies (scrapped)
2011 BMW 535xi M pack (daily)

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Re: ST205 Front Brake Install, IS300 Rotors

Postby FC Zach » Thu Jul 07, 2016 8:31 pm

quieter wrote:what's the distance between the disc and the ball joint in the front? nice write up!


The specifics like that I never measured however there is a gap. Next time I have the wheel off I'll measure it and/or take a picture.
1992 Toyota Celica AllTrac
1987 Mazda RX7 Sport
1979 Yamaha G1A, rotary powered with Sachs KM24
1976 Hercules W2000, oil injected
User avatar
FC Zach
Club Member
 
Posts: 800
Images: 9
Joined: Mon May 20, 2013 7:43 am
Location: Eagleville, TN

1992 Toyota Celica

Re: ST205 Front Brake Install, IS300 Rotors

Postby FC Zach » Thu Jul 07, 2016 9:12 pm

Here's a clip I just took of the heat shield (click on image below for vid), forcing toward the joint to show there's clearance between the ball joint and shield. . . obviously there's clearance the other direction too since I have no grinding from the shield and rotor. So with this, I see no issue but I'm no engineer :)

ImageVID_20160707_164036148 by Zach Moore, on Flickr
1992 Toyota Celica AllTrac
1987 Mazda RX7 Sport
1979 Yamaha G1A, rotary powered with Sachs KM24
1976 Hercules W2000, oil injected
User avatar
FC Zach
Club Member
 
Posts: 800
Images: 9
Joined: Mon May 20, 2013 7:43 am
Location: Eagleville, TN

1992 Toyota Celica


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