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 Post subject: what turbo?
PostPosted: Sun Jun 30, 2013 9:10 pm 
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Clubman

Joined: Tue May 22, 2012 2:47 pm
Posts: 65
Location: Andover, Hants
Car Model: ST185
Right guys and girls I'm looking to get my st185 back in shape and want 300bhp... So could use some advice on what turbo would be advisable? Plan to have electronic boost controller so I can run .8 and 1 bar but would like room for expanding the power when I forge the internals... So what you all reckon?


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 Post subject: Re: what turbo?
PostPosted: Sun Jun 30, 2013 10:47 pm 
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Joined: Wed Jul 13, 2005 12:14 am
Posts: 3224
Location: Camberley, Surrey
Car Model: ST205
Turbo Technics S148 hybrid with single waste gate.

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 Post subject: Re: what turbo?
PostPosted: Sun Jun 30, 2013 11:06 pm 
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Joined: Wed Jul 13, 2005 12:06 am
Posts: 4742
Location: Perth, Western Australia
Car Model: ST205
If you do a search on here I think you will find the overwhelming response will be the Turbo Technics S148, preferably the earlier model with the single wastegate if you can find one. Minimal boost creep compared to most other uprated turbos and good for up to 380bhp.

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1994 Toyota Celica GT-Four ST205WRC JDM 269bhp @ 0.9bar
1994 Toyota Celica GT-Four Special GT 590bhp @ 1.8bar
1989 Van Diemen RF88/89 Formula Ford 1600
2012 Van Diemen JL12 Formula Ford 1600
2008 Nissan Patrol GU 3.0L ZD30DDTi 154bhp


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 Post subject: Re: what turbo?
PostPosted: Sun Jun 30, 2013 11:15 pm 
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Joined: Thu Jul 14, 2005 12:44 pm
Posts: 4067
Location: drinking devil fuel
Car Model: ST205
Stock Toyota
A ct26 will get you there but will need a bit of pushing
A ct20 will do that easily


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 Post subject: Re: what turbo?
PostPosted: Sun Jun 30, 2013 11:39 pm 
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Joined: Wed Jul 13, 2005 12:06 am
Posts: 4742
Location: Perth, Western Australia
Car Model: ST205
Agree the CT20 would do 300bhp but not sure for how long as the standard thrust bearings are prone to short life if you up the boost with an EBC.

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Don
GT4DC Chairman
1994 Toyota Celica GT-Four ST205WRC JDM 269bhp @ 0.9bar
1994 Toyota Celica GT-Four Special GT 590bhp @ 1.8bar
1989 Van Diemen RF88/89 Formula Ford 1600
2012 Van Diemen JL12 Formula Ford 1600
2008 Nissan Patrol GU 3.0L ZD30DDTi 154bhp


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 Post subject: Re: what turbo?
PostPosted: Mon Jul 01, 2013 1:56 am 
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Joined: Thu Jul 14, 2005 12:44 pm
Posts: 4067
Location: drinking devil fuel
Car Model: ST205
For 300 I think I would still stick with Toyota parts. The stock ct26 would work and allow funds to be diverted to the ecu and headgasket fund. It's all very well slapping a big turbo on but the 185 will struggle to reach 300hp safely and if it does you are into paper gasket failure territory....


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 Post subject: Re: what turbo?
PostPosted: Mon Jul 01, 2013 3:07 am 
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Group N

Joined: Tue Feb 16, 2010 4:05 am
Posts: 207
Location: Germany
Car Model: ST185 CS/RC
TrackToyFour wrote:
Agree the CT20 would do 300bhp but not sure for how long as the standard thrust bearings are prone to short life if you up the boost with an EBC.


My Ct20 did 70 k km at 1.15 Bar boost and still was fine. Only took it out to replace it by an custom made upgraded CT20 with an Borg Warner K24 compressor wheel.

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 Post subject: Re: what turbo?
PostPosted: Mon Jul 01, 2013 8:15 am 
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Joined: Wed Jul 13, 2005 12:14 am
Posts: 3224
Location: Camberley, Surrey
Car Model: ST205
Good call on the stock turbo. The ST185 doesn't seem to suffer from boost creep as much as the ST205 so the waste gate probably not so much of an issue.

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 Post subject: Re: what turbo?
PostPosted: Mon Jul 01, 2013 12:44 pm 
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WRC

Joined: Sun Oct 01, 2006 2:14 pm
Posts: 1098
Location: sunny sleaford- lincolnshire
Car Model: ST205
i'm now onto 140,000miles..... turbo as of yet has never been off (touch wood) and run many many trackdays in its time at 1.15bar.

Road use she sees mainly .9-1bar


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 Post subject: Re: what turbo?
PostPosted: Tue Jul 02, 2013 12:36 pm 
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Clubman

Joined: Tue May 22, 2012 2:47 pm
Posts: 65
Location: Andover, Hants
Car Model: ST185
Thanks guys! (and possibly girls) will look into the turbo technics and ct20 for sure, just worried about pushing the ct26 to over 1 bar in case it rips itself to pieces...


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 Post subject: Re: what turbo?
PostPosted: Tue Jul 02, 2013 1:50 pm 
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Group N
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Joined: Sat Apr 28, 2007 9:22 am
Posts: 233
Location: Central Dorset
Car Model: None
My CS ct26 ( larger compressor wheel than normal ct26 ) when it failed at 253k miles only bent turbine blades. And then the shaft. Very clean failure IMO. It allowed me to drive 55 miles back home.... Was a nice smoke screen behind me though !


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 Post subject: Re: what turbo?
PostPosted: Tue Jul 02, 2013 10:34 pm 
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Junior WRC

Joined: Sun Nov 27, 2005 8:43 pm
Posts: 998
Location: NLD
Car Model: None
Disco potato!

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 Post subject: Re: what turbo?
PostPosted: Wed Jul 03, 2013 9:13 pm 
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Group N
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Joined: Thu Jul 06, 2006 12:56 pm
Posts: 189
Location: Bristol / Dorset
Car Model: None
Defo a stock ct20b, cheap and readily available, proven to make 300bhp on tons of cars, in fact some have run them at alot more.

If your goal is only 300 then there is no need to spend 2x plus as much on a hybrid.

P.S. turbo technics S148 is good for more than the 380bhp advised by the manufacturer ;)

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Now back home and mapped to 531bhp & 411lb/ft - that's enough power for now! :D


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 Post subject: Re: what turbo?
PostPosted: Tue Nov 12, 2013 9:15 pm 
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New Poster

Joined: Sat Oct 19, 2013 9:28 pm
Posts: 18
Car Model: ST185 CS/RC
TrackToyFour wrote:
Agree the CT20 would do 300bhp but not sure for how long as the standard thrust bearings are prone to short life if you up the boost with an EBC.

Hi,what is the boost of the ct20b mounted in st185? high boost (1,1bar) at 6700-7000rpm its posible?


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 Post subject: Re: what turbo?
PostPosted: Tue Nov 12, 2013 11:24 pm 
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Club Staff
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Joined: Wed Jul 13, 2005 12:06 am
Posts: 4742
Location: Perth, Western Australia
Car Model: ST205
The stock cams and turbo would be outside their efficiency range at that rpm. If you let us know what your goals are for the car we can advise. Engine mods, horsepower and torque, road and/or track use etc. etc.

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Don
GT4DC Chairman
1994 Toyota Celica GT-Four ST205WRC JDM 269bhp @ 0.9bar
1994 Toyota Celica GT-Four Special GT 590bhp @ 1.8bar
1989 Van Diemen RF88/89 Formula Ford 1600
2012 Van Diemen JL12 Formula Ford 1600
2008 Nissan Patrol GU 3.0L ZD30DDTi 154bhp


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