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Location:
Canberra
Registered:
May 2002
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Supra CT26 vs GT4 CT26
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Mon, 13 January 2003 07:23
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OK, so the Supra CT26 is single entry, and the MR2/GT4 is twin entry, but can you interchange the two?? I want to fit a twin entry exhust housing to a supra core & compressor.
can it be done??
thanks in advance
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Location:
Gold Coast
Registered:
May 2002
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Re: Supra CT26 vs GT4 CT26
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Mon, 13 January 2003 08:26
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You will have to machine out the inside of the GT4 Turbine housing due to the GT4 Turbine being slightly smaller.
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Location:
Canberra
Registered:
May 2002
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Re: Supra CT26 vs GT4 CT26
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Mon, 13 January 2003 10:10
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are you sure?? I was under the impression that they had the same turbine specs, just one was ceramic...
I'm not saying you're wrong, It would just help my case if you were 
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Registered:
June 2002
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Re: Supra CT26 vs GT4 CT26
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Mon, 13 January 2003 20:07
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You may find the Supra turbine wheel has a different trim height etc... and the housing will need to be machined. This isn't a biggie, most turbo shops shouldn't charge more than hours labour to do this, If you handy with a lathe you could do it yourself.
I'm sure someone could help you out with the tolerances.
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Location:
Canberra
Registered:
May 2002
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Re: Supra CT26 vs GT4 CT26
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Mon, 13 January 2003 21:47
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what motor is that in your E30??
Cheers
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Registered:
June 2002
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Location:
Canberra
Registered:
May 2002
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Re: Supra CT26 vs GT4 CT26
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Thu, 16 January 2003 12:43
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The CT26 exhaust housings are interchangeable .
I swapped them today.
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Location:
uk england
Registered:
April 2005
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Re: Supra CT26 vs GT4 CT26
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Wed, 13 April 2005 19:28
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just to confirm, you fitted a st 185 ct 26 twin entry turbine housing to your supra ct 26 single entry compressor and centre core?
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Toymods Vice President
Location:
Sydney
Registered:
May 2002
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Re: Supra CT26 vs GT4 CT26
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Thu, 14 April 2005 04:47
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We did this for Dave the events co-ordinator. We put a 7M CT26 turbo into his ST185 exhaust housing.
One question though, why did you want to use the twin entry turbine housing?
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Location:
uk england
Registered:
April 2005
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Toymods Vice President
Location:
Sydney
Registered:
May 2002
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Re: Supra CT26 vs GT4 CT26
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Thu, 14 April 2005 08:37
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| **BETSY** wrote on Thu, 14 April 2005 16:59 |
i am using a gen 1 3sgte engine at the moment which of cousre uses the single entry turbo.
i have bought a supra ct26 and when i finish building my new gen 2 3sgte shall be going with the twin entry set-up to enable me to use the st 205 charge cooler etc
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OK off topic but, you know you'll have to modify the inlet on the ST205 cooler and the outlet doesn't go into the St185 rubber throttle body neck right.
The 205 has the turbo further towards the gearbox so the IC doesn't line up if you use a Gen2 exhaust manifold and a Gen3 exhaust manifold doesn't fit a Gen2 head.
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Location:
Sydney
Registered:
October 2003
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Re: Supra CT26 vs GT4 CT26
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Thu, 14 April 2005 08:46
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I was scratching my head for a little while wondering why people had been able to clock the ct26's on gen2's and I had no chance of clocking the ct20B on my gen2 as it would foul on the starter buldge.
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Location:
uk england
Registered:
April 2005
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Re: Supra CT26 vs GT4 CT26
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Thu, 14 April 2005 11:17
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hi, the st 165 has been fitted with a st 205 charge cooler over in the states, saved 1992.
im aware the t/b inlet is 55mm as oppose to 60mm ( 70mm on charge cooler outlet)
all fun and games
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Location:
Canberra
Registered:
May 2002
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Re: Supra CT26 vs GT4 CT26
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Thu, 14 April 2005 12:18
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Wow  this is old!
I swapped the housings cause boost response on my old 4AGE turbo setup was crap, and was trying to improve it with the [supposedly smaller A/R] twin entry housing.
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Location:
uk england
Registered:
April 2005
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Re: Supra CT26 vs GT4 CT26
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Thu, 14 April 2005 12:34
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and did it improve response?
i guess not!?
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Location:
Canberra
Registered:
May 2002
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Re: Supra CT26 vs GT4 CT26
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Thu, 14 April 2005 12:39
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Only by about 200-300rpm, cause I didn't have a twin entry manifold to match. I just ported the divider between the two ports in the exhaust housing to remove the flow restriction of the flat surface.
I knew it was a gamble for possibly no return, but had both housings so figured it was worth a try, for research if nothing else!
Cheers
Phil
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Location:
uk england
Registered:
April 2005
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Re: Supra CT26 vs GT4 CT26
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Thu, 14 April 2005 12:41
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cheers for shring this with us phil.
its what the net needs, definate answers as opposed perhaps and maybes..
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Location:
Canberra
Registered:
May 2002
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Re: Supra CT26 vs GT4 CT26
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Thu, 14 April 2005 12:46
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No worries.
So you don't wan't me to tell you that it was actually my mate's dad's stepcousin who knew someone who raced once that had a dog that reckoned it should make an extra 5psi & 55kw?   Just kidding. Sorry to all of the third-hand information givers out there I didn't mean to hurt any feelings.... much
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Location:
uk england
Registered:
April 2005
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Re: Supra CT26 vs GT4 CT26
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Thu, 14 April 2005 16:36
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i like ya sense of humour but... you stole my yarn of my mates dads friend down the pub said his brothers neighbour who's brother twice removed..........
lol... cheers buddy...
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