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Registered:
May 2002
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ST205 brakes on a 185
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Thu, 29 January 2004 12:21
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Hi Guys,
Finally got my hands on a set of 205 brakes  (thanks Joe) and am about to attempt the conversion. Anyone done this or knows what is exactly involved.
Question ?
The 205 rotors are huge  and sit deeper on the hub. The lower ball joint underneath is just touching the disc at the moment. Is a spacer necessary between the hub and the disc or will clearence increase once the car is lowered and the arms straighten. The hub has a little bit of play back and forth and was wondering if this will give me more clearence once the CV's are installed and tightened as I think this will push the hub out. Im just not sure if this will be enough.
Thanks,
Anhar Khamas
GT4 Group A Carlos Sainz #13
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Location:
Canberra
Registered:
April 2003
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Re: ST205 brakes on a 185
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Thu, 29 January 2004 14:16
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I think you would need a spacer of some sort, but if this is not safe enough maybe you would need 205 hubs? I was told that no matter what you do 205 rotors don't seem to balence properly on a 185, I know JustenGT4 attempted this but gave up cause it was too difficult, instead he had custom rotors made up. try PMing him and alert him to this thread.
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Registered:
May 2002
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Re: ST205 brakes on a 185
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Fri, 30 January 2004 09:30
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From memory Justen did finish the conversion as I saw it at a toymods dyno day a couple of years back. I spoke to him and he gave me a few pointers  ...... thanks wiso for the direction.
What I am now wondering is would the whole 205 hub and all bolt up to the existing parts eg steering arm, suspension etc to make this conversion a true bolt on?
Anhar Khamas
GT4 Group A
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Location:
Colac, Victoria
Registered:
May 2002
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Location:
Brisbane
Registered:
February 2003
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Registered:
May 2002
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Re: ST205 brakes on a 185
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Fri, 30 January 2004 11:05
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Stuart I found that this is very basic information compared to whats really involved but Justen gave me measurements which is what I was looking for.
The 205s are aluminum calipers and even though they are more then double the size of the originals, they weigh about the same if not less.
Spectral - Thats not a bad price at all considering that willwoods are the lightest and one of the most durable calipers out there. I did go to Racebrakes and they use 4 pot AP calipers, DBA rotors, braided lines, Race pads, and AP fluid for about $2600 AUS fitted which aint too bad.
I just went for the 205s because its gonna give me the best $$ vs gain.
Anyone that wants to pull apart there 205 to answer my Question about interchangeable hubs please feel free to do so 
Anhar Khamas
GT4 Group A
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Location:
Colac, Victoria
Registered:
May 2002
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Re: ST205 brakes on a 185
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Fri, 30 January 2004 11:12
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haha ! ask gary too
and while hes at it he can pull apart his intercooler setup to show me how mine should roughly go on
Nods to the brakes though - im going on heresay - personally id love any brakes better than what i have - and even they arent half bad ..
mind you - your car puts out a lot morre ponies than mine so any upgrade to Stop is a good thing
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Registered:
May 2002
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Re: ST205 brakes on a 185
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Fri, 30 January 2004 11:39
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"mind you - your car puts out a lot morre ponies than mine so any upgrade to Stop is a good thing"
At the moment the only power Im making is about 0.02kw at the cigerette lighter but the goal is 200kw / high 11 to a flat 12sec pass - which ever comes first.
Gary..... do you hear that. I have a Supa Cheap shifter and Im on my way to your place.
Anhar Khamas
GT4 Group A
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Location:
Brisbane
Registered:
February 2003
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Re: ST205 brakes on a 185
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Fri, 30 January 2004 11:40
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200Kw will come first
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Location:
Colac, Victoria
Registered:
May 2002
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I Supported Toymods
Location:
Sydney
Registered:
December 2002
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Re: ST205 brakes on a 185
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Fri, 30 January 2004 21:32
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I hate to say it but most 4WD cars make pretty poor drag cars... the only way to get a GT4 going hard at the start is to do a 3500-4000rpm clutch dump... obviously this is not very clutch friendly and would put quite a lot of strain on the gearbox & driveshaft/s...
According to most people I have spoken to about GT4's say you would need to be doing quite a bit of work to get 200+kw at all 4...
To get to 200+ from what I gather you would need the following level of hardware at minimum: (this is what was / am considering)
-Twin plate clutch
-Garrett GT30+ (maybe GT35...) and external wastegate etc. to go with
-Large FMC
-Forgies
-Head job
-ARP head studs / bolts etc.
-HKS metal head gasket
-Full Aussie exhaust system (i.e. dump pipe back)
-New ECU (Haltech? MoTeC?)
-Strengthened gearbox (cryogen?)
Should be able to run 20psi constantly and 30+ on the track with this type of setup and even then from what I hear its still unlikely that you would break 200kw at all 4...
You would prob be looking at 15-20K worth of mods to get 200+
Actually I would like to know of anyone that has gotten 200+ in a GT4 with street legal hardware... Seriously!
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Registered:
May 2002
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Re: ST205 brakes on a 185
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Sat, 31 January 2004 02:09
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Talk about gettin side tracked from the topic.
Toobs, I agree fully that GT4's are a very poor choice for a drag car thats why I want to do it.
I guess you do not know what hardware I using but lets say its far from stock. The car with the old 185 (internally standard)setup pushed out a 174kw @ all wheels at a moddest 1 bar. Since then I have reduced the cars wieght to 1290kg and just installed a new GEN III motor.
The Group A gearbox and driveline is almost industructable.I launch nothing under 5000 rpm and yes I have chewed up 4 clutchs and re sculptured some interesting pressure plates but thats what drag racing is about , pushing the limits.
A pod filter these days are considered illegal so what do you mean by street legal.
Anhar Khamas
GT4 Group A
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I Supported Toymods
Location:
Sydney
Registered:
December 2002
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Re: ST205 brakes on a 185
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Sat, 31 January 2004 07:10
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Sorry somebody said 200+kw gtfour
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Location:
Colac, Victoria
Registered:
May 2002
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Re: ST205 brakes on a 185
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Sat, 31 January 2004 09:41
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heh - Anhars right - 180kw is obtainable quite easily with highflowed ct26, some strengthening of the internals , and a decent clutch setup
Steve bignalls machine using a highflowed ct26 , lightened internals - and some other custom goodies turns over 260Kw at the treads - and is daily driven .. thats BEFORE he give it some giggle gas ..
Its not impossible thats for sure - read up on that zoom 3sgte tuners guide for a nutshell rundown of whats needed to pump out 200 kw
Anhar again - getting BACK on topic - can you please take a heap of pics and maybe write up in detail how yopr heading with the 205 swap .. A good tech " how to " would be bloody handy ..
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Registered:
May 2002
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Re: ST205 brakes on a 185
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Sat, 31 January 2004 10:35
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I will definitly do a write up with pics as a reference for people that would like to attempt this in the future. I would just like to know if the hub transplant would be an option because if this mod can be exacuted with no fabrication then it would prove very popular for all 185 owners.
Anhar Khamas
GT4 Group A
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Location:
Colac, Victoria
Registered:
May 2002
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Re: ST205 brakes on a 185
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Mon, 08 March 2004 09:14
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Hows the write up on this going puffy ?
Btw - are you using the 205 rears as well ? if so do you change the rotor or keep the existing one and change just the calipers ?
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Registered:
May 2002
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Re: ST205 brakes on a 185
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Mon, 08 March 2004 13:00
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I dont have the rears  but know from people that have done the rear upgrade that its pretty much a bolt on conversion.
I have machined the discs down to 300mm . Tapped the caliper and hub with a 14m thread. The spacer that push the hub out needs to be 4mm thick as this will center the disc between the capilers perfectly. 5mm is what others have used but I found that to be a mm too much.
I have done some of the write up and will put it up once complete.
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Location:
Canberra
Registered:
June 2003
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Re: ST205 brakes on a 185
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Tue, 09 March 2004 02:05
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Anhar,
Too late for you now i guess but no chance in hell the 205 hub assembly bolts up to a 185. They use the wanky Super Strut front suspension which has given everyone, including TTE, nothing but trouble.
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