interest in custom brackets to fit porsche calipers

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Re: interest in custom brackets to fit porsche calipers

Postby gtfourtc » Tue Mar 15, 2011 10:18 pm

Also just got done modifying the stoptech wheel fitment guide for the tc it will work for the celica so you can check your wheel clearance with this setup. I can email the pdf file.

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Re: interest in custom brackets to fit porsche calipers

Postby athousandleaves » Fri Apr 08, 2011 4:31 am

I would be all over this provided answers to the following:
    1. Will we need to install a proportioning valve for this setup?
    2. Is this caliper setup compatible with our stock master cylinder or will it have to be upsized as well?
    3. Can anyone with a 165/185 post a review of how these feel?
    4. How close is the STi rotor to the ball joint?

As much as I hate not having easy access to a 205 rebuild kit I really only want to upgrade my brakes once and already own 205 calipers.

gtfourtc, if I was able to supply you with measurements do you think you could produce a bracket to fit the 205 brakes on the 185?
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Re: interest in custom brackets to fit porsche calipers

Postby celicat93 » Tue Apr 19, 2011 4:21 pm

I'm interested but it may be awhile. Out of interest for economy in the short-term I just replaced my front pads with standard ones (If my tax rebate had been here, I would have asked for a set now). Looking at the rest of my To Do List, I'm not sure where I would squeeze it in, in the line of priority... My braking is okay for now, but I would like it to be much better. I guess when the rebate comes, I'll go ahead and buy a set from you and hold onto them until I'm ready to pay for the rest of the upgrade. So count me in, I'm supposed to be getting my money within the next month.

EDIT: Oh yeah, what he said (next post up)

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Re: interest in custom brackets to fit porsche calipers

Postby Mitsuslider » Sat May 14, 2011 3:45 am

Im sorry gtfourtc I totally forgot about this until one of my rears locked up yesterday. From everything ive seen on my old 91trac and my 88trac the brackets should work. How many kits do you have made and how long is it gonna take you to ship them out?
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Re: interest in custom brackets to fit porsche calipers

Postby gtfourtc » Wed May 25, 2011 12:25 am

hey all sorry i have been lame and not answered all the latest questions.

Mitsuslider: i think i have 5 kits that are ready to go and can ship as quickly as i receive payment.

celicat93 and athousandleaves:

1: no proportioning valve would be needed.
2: it is compatible with the stock master cylinder, piston sizes are smaller than the st205 calipers
3: I think I have sold a set to one person so i will have to pm them to see if they have completed it yet
4: It should be close probably a couple mm, it was this way on my tc with the stock st205 rotors I had to remove the dust shields comletely but had no issues at all.

sorry again for the slow responses school is out now and the fsae race car is completed so i have lots of free time.
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Re: interest in custom brackets to fit porsche calipers

Postby gtfourtc » Wed May 25, 2011 12:33 am

to help answer question 4 about ball joint clearance i just saw this post

viewtopic.php?f=8&t=40892&p=391022#p391022

when using the porsche calipers you would prob be best shaving them down to the 28mm which would give you about 3mm, which is what i had on my tc and had no issues.
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Re: interest in custom brackets to fit porsche calipers

Postby athousandleaves » Wed May 25, 2011 2:24 am

Good to hear back from you gtfourtc.

From what I can recall the stock distance to the ball joint from the rotor is around 35mm... so to go from 35mm down to 2-3mm is a pretty dramatic difference! A 5mm spacer under the hat might just be enough to space it out and make it a bit safer but of course that would play with the caliper's position.

To reiterate, would you be able to produce a ST205 brake adapter bracket for the ST185 if I could supply you with all the measurements you needed?
Its rare to get someone interested enough in our community with the skills and access to the tools to build something such as this so it would be amazing if you would be willing to take this on!
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Re: interest in custom brackets to fit porsche calipers

Postby gtfourtc » Wed May 25, 2011 4:24 am

yeah 2-3mm is definatley on the close side but not so bad, oh and 35mm sounds a bit too much. stock rotors are 46.2mm deep sti rotors are 52.7 so it sits about 6mm closer. I designed the brake system on the University of Kansas formula sae race car and i had some caliper bolts that were maybe .5-1 mm away from the rotor.

anyways if you can get me precise caliper dimensions I can try to get something to work with the st205 calipers. I know its gonna be pretty tough but i can play around a bit on solidworks. I have a st185 hub/upright so i have those dimensions. did you have a rotor dia in mind as i know you can do a stock bolt on with something around 300mm
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Re: interest in custom brackets to fit porsche calipers

Postby UtahSleeper » Wed May 25, 2011 2:39 pm

Glad someone has been able to make a nice upgrade piece for our cars. When I start working on my alltrac (and have money) I hope you will still have some of these kits.
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Re: interest in custom brackets to fit porsche calipers

Postby gtfourtc » Wed May 25, 2011 3:18 pm

3tcpower: Oh I imagine i will be around for some time, I still have the dream of using st205 drivetrain to make a scion tc awd.
alltrac.net is probably the only source for real info and perhaps the only forum i can stand. BTW I like you name I have an 82 corolla sr5 2dr that i am slowly trying to work on. more big plans im afraid and yeah it sucks when you have the free time you dont have the moneys.
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Re: interest in custom brackets to fit porsche calipers

Postby athousandleaves » Mon Jun 13, 2011 4:15 am

Was looking over my measurements today and would like to correct that the distance from the ball joint to the back face of the rotor is NOT 35mm. :doh:

That is the distance from the back of the hub to the ball joint!
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Re: interest in custom brackets to fit porsche calipers

Postby bitter » Wed Jun 15, 2011 10:09 pm

anyways if you can get me precise caliper dimensions I can try to get something to work with the st205 calipers. I know its gonna be pretty tough but i can play around a bit on solidworks. I have a st185 hub/upright so i have those dimensions. did you have a rotor dia in mind as i know you can do a stock bolt on with something around 300mm[/quote]


If you could do a bracket with an 2004 STI rotors and ST205 calipers that would be great. That way it'll be easy for everyone to source rotors. I'm definitely be in for one of these brackets.
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Re: interest in custom brackets to fit porsche calipers

Postby jonnyboygt4 » Thu Jun 16, 2011 2:04 am

a front set of the required porsche calipers... 8)

http://cgi.ebay.ca/99-PORSCHE-911-CARRE ... 3f0a0cf28c
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Re: interest in custom brackets to fit porsche calipers

Postby gtfourtc » Mon Jun 20, 2011 3:32 pm

Hey Just got back from the california fsae competition, I was looking at the caliper dimensions i got, there are a couple problem as other that have tried to make a "simple" bracket. I will keep exploring some options.

Bitter it may not be possibly with the sti rotors but i have a few others in mind that might work. If it does there would probably be some grinding of the caliper and hub ears to get the caliper to fit properly.

jonnyboygt4, thats a decent price for good condition calipers, however go to car-part.com and you can get them anytime you want for 400 a set and sometimes less, i was looking at a set the other day for someone who wanted me to do a full kit for his tc and they would have been 300 for both.
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Re: interest in custom brackets to fit porsche calipers

Postby T3K_ST165 » Sat Oct 08, 2011 9:38 pm

If you still have any kits available(or at least the drawings) I'm interested. contact me tekst165@gmail.com.....sorry I dont get on this forum often anymore. Been concentrating on my G35 and my gf's mustang lately.
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