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RedRkt01
12-28-2009, 03:18 PM
ST162 with rear discs AND 4x100 lugs:

http://i399.photobucket.com/albums/pp80/redrkt02/Picture002.jpg
http://i399.photobucket.com/albums/pp80/redrkt02/Picture001.jpg

Front for comparison:

http://i399.photobucket.com/albums/pp80/redrkt02/Picture003.jpg
http://i399.photobucket.com/albums/pp80/redrkt02/Picture004.jpg

4thgenceli
12-28-2009, 03:29 PM
Pictures no worky ;(

RedRkt01
12-28-2009, 03:57 PM
I a little ahead of myself ;)

I don't know if this trick can be applied to other generations, so I chose to put this in the 4th Gen forum as opposed to the Brakes forum. As far as I know nobody has taken the time to to a 4lug/disc conversion; Everyone grabs the 5 lug parts.....

Futant3
12-28-2009, 04:13 PM
Glad to see this project worked out as planned, any insights or unforeseen issues now that you've got it together? Also how does the diameter of the GTS rotor compare to the fronts? Or to convertible fronts if you have a way to answer that?

RedRkt01
12-28-2009, 04:48 PM
The fronts are smaller than the rears. Kinda looks funny, but I wouldn't expect otherwise as there has to be room in the rear for the parking brake drum. I'd say the rears are about an 1-1.5" larger than the front. Either way, it doesn't really bother me.

Murgatroy
12-28-2009, 04:51 PM
How did you do it? Re-drill for a 4x100 pattern?

4thgenceli
12-28-2009, 04:57 PM
I'm thinking found a disc in 4x100bolt pattern from different car, or adapted somehow the front to work on rears...

RedRkt01
12-28-2009, 04:58 PM
How did you do it? Re-drill for a 4x100 pattern?

Affirmative.

Murgatroy
12-28-2009, 05:03 PM
Tweak used to offer something similar for Corolla owners, where he redrilled 6th Gen Celica rotors to the 4x100 pattern.

Myself, I was always interested in attempting to use Corolla parts.

However, redrilling the rotors would mean I wouldn't have to change hubs, just rotors, calipers and brackets, front and rear.

Where and how did you get them drilled?

RedRkt01
12-28-2009, 05:19 PM
I called up KVR, one of my brake suppliers, and said that I wanted rear '89 GTS discs cross drilled and rebored for 4x100. I talked to their engineers about structural integrity and they said I was goo to go. So I did it.

Tim, don't even mess around with that. If you get a complete rear disc setup from a GTS all you'll have to do is swap rotors. Even with 5x100 rotors rebored for 4x100 you'll have 100% complete 4th Gen dedicated parts on your car. No more fucking around with FX-16 parts and all that shit.....no one can find that stuff anymore anyway. Do what I did and you'll be good to go.

CriScO
12-28-2009, 06:39 PM
Yeah, I was kicking around re-drilling simply because I didn't have $600+ to drop on wheels/tires.

Then I got a whole GT-S and it didn't matter anymore. :D

RedRkt01
12-28-2009, 06:58 PM
Yes, hard ones in back. they aren't that rounded yet as I stopped fooling with them to prevent further damage. Hence thread!!! Thatnks for the help so far fellas......keep it coming.

Rick89GTS
01-02-2010, 10:13 AM
What is the benefit of going from 5-bolt to 4-bolt? Seems like a downgrade to me. Is it simply more wheel selection?

Hookecho
01-02-2010, 04:05 PM
very nice!

Galcobar
01-02-2010, 09:00 PM
What is the benefit of going from 5-bolt to 4-bolt? Seems like a downgrade to me. Is it simply more wheel selection?

Re-drilling rotors to get four-lug rears for your four-lug fourth-gen you'd need: rear rotors, rear calipers, rear caliper brackets.

Swapping to five-lug all around: 4 x hubs, 4 x rotors, 4 x calipers, 4 x brackets, new five-lug wheels.

The benefits: time and money saved.

Futant3
01-02-2010, 09:53 PM
In RedRkt01's case, he had 4 lug rims he didn't want to part with. Same issue for me.

On the diameter of the rotors, how difficult would it be to do something similar to the front so that they are bigger or equal to the rear? If there a difference in the front calipers or perhaps just a need to change the mount bracket? Perhaps I should get around to loading the EPC. :)

Rick89GTS
01-03-2010, 01:11 AM
In RedRkt01's case, he had 4 lug rims he didn't want to part with. Same issue for me....
Ok, I get it now, thanks.

RedRkt01
01-03-2010, 02:44 AM
Rick, they covered everything I'd have responded with.

Futant, people upgrade all the time to alltrac fronts. I'll eventually use the same trick up front.

CriScO
01-05-2010, 06:19 AM
On the diameter of the rotors, how difficult would it be to do something similar to the front so that they are bigger or equal to the rear? If there a difference in the front calipers or perhaps just a need to change the mount bracket? Perhaps I should get around to loading the EPC. :)
The GT-S rotors are bigger, you need the brackets but the calipers are the same. I honestly can't even remember which set I used, I hope it was the GT, they were only a year old... :sneak:

And as Kevin said, All-Trac units are even more of an upgrade. Esp. the twin piston ones.

That's right! I did use the GT calipers. I was pissed about the brackets because the old ones were red. Didn't have time to paint the new ones.

Futant3
01-05-2010, 03:54 PM
That sounds like a better option for me, less parts involved if all I would need is the bracket/rotors, and not a new set of calipers.

Real issue is that the rear drums are shot so I've got to deal with them anyway but don't wanna sink more money than I have to into the project.

RedRkt01
01-05-2010, 04:00 PM
Do what I did!

Chuck
01-25-2010, 02:15 AM
Great post!

I'll be sure to keep an eye out for a GTS brake setup.

89whitest
12-01-2014, 06:55 AM
Sorry to revive an old thread but would I also need parking/brake lines from a gts?

Murgatroy
12-02-2014, 09:49 PM
I can't speak for the 4th gen with certainty, but the brake lines are the same, the parking cables though, yes, you need the parking cables from the GT-S.

89whitest
12-05-2014, 05:50 AM
Got it. And what about the dust shield?

METDeath
12-05-2014, 06:26 AM
Got it. And what about the dust shield?

Drums don't have a dust shield... so you'll need one of those.

Edit: More accurately drums ARE the dust shield...

RedRkt01
04-03-2015, 07:32 PM
You'll need the entire GT-S rear brake assembly. If you want to stay 4x100 you'll used everything except for the hubs and the rotors (unless you drill the rotors).