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Registered:
January 2004
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differences in CT20b
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Sun, 01 May 2005 06:12
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Hey all, jus a quick question, would the turbo (CT20b ) on a ST205 be the same as the one on the diesel surf engine the 2L. there both got CT20b on them , but the diesel one looks smaller,
i hav from memory a two or three at work , and jus wanna know if there the same or whats the differences?
Thanks !
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Location:
On your mum!
Registered:
May 2002
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Re: differences in CT20b
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Sun, 01 May 2005 08:22
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count on them being different (a 2.0L diesel will not have the exhaust or intake volume of the ST205)
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Location:
Brisbane, Queensland
Registered:
January 2004
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Re: differences in CT20b
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Sun, 01 May 2005 09:20
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There is no such thing as a CT20B, its a internet nickname given to the 3rd revision CT26 available on the 3rd gen 3S-GTE.
It is by no means related to the CT20.
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Location:
Adelaide
Registered:
July 2002
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Re: differences in CT20b
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Sun, 01 May 2005 10:29
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| SXY184 wrote on Sun, 01 May 2005 15:42 |
there both got CT20b on them
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so theres no such thing as a ct20b? curious, coz ive never heard of it being called anything else. the st185's/sw20 mr2 had the ct26 and the upgrade for the st205 and the 3rd gen mr2 sw20 was a new turbo with increased standard boost, i think it was uped from like 10 to 13 on the mr2's not sure bout the sillycars. Or i culd be completely wrong....
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Location:
Sydney
Registered:
October 2003
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On Probation
Location:
Sydney
Registered:
April 2005
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Re: differences in CT20b
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Sun, 01 May 2005 21:12
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ct20 is the name of the turbo. No 'b' after. If you go to toyota they can look uo the ct20 on their computer sustem.
Ct20 is a beter turbo for a near stamdard gen 2 3sgte.
I has a larger exhust housing and is slightly larger. It can compress more air and hold hihger boost far more efficiently.
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Location:
Brisbane
Registered:
May 2002
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Re: differences in CT20b
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Mon, 02 May 2005 00:09
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Toyota seems to have about a dozen turbos called CT20 which are totally different to each other. Even my 2JZ-GTE has CT20A turbos, and they look nothing like the CT20's on 3T-GTE's or old diesels.
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Location:
Canberra
Registered:
June 2003
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Re: differences in CT20b
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Mon, 02 May 2005 03:03
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There is a lot of confusion about the turbo on the Gen III 3SGTE but i have only ever heard of it referred to as the CT20B and we are talking from a long time ago now.....8-10 years.
As long as everyone knows what you are referring to then that's all that really matters...particularly as there doesn't appear to be any other designation for this turbo.
As for it being a different beast to the Surf turbo, most definitely.
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Location:
On your mum!
Registered:
May 2002
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Re: differences in CT20b
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Mon, 02 May 2005 03:14
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| ralfross wrote on Mon, 02 May 2005 07:12 |
ct20 is the name of the turbo. No 'b' after. If you go to toyota they can look uo the ct20 on their computer sustem.
Ct20 is a beter turbo for a near stamdard gen 2 3sgte.
I has a larger exhust housing and is slightly larger. It can compress more air and hold hihger boost far more efficiently.
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I think that you are on your own with this statement.
As JustenGT4 has pointed out; there needs to be clear differences in the naming of the turbos.
If you go into a wrecking yard and ask for a CT20 turbo, then what you will get is not guaranteed.
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Location:
Canberra
Registered:
June 2003
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Re: differences in CT20b
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Mon, 02 May 2005 03:55
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I don't know where Ralfross gets his "info" but i can safely say that he's usually so far off the money that it's almost better to do the opposite of any of his advice 
As most of you know the CT20 is a boat anchor masquarading as a turbo
As for the CT20B it has a SMALLER a/r turbine housing than the CT26. It has a large compressor wheel inside what effectively amounts to a machined out CT26 front cover.
A great combo turbo using toyota bits is to use the CT26 turbine housing and bearing section and have a CT20B comp wheel bored out to bolt onto the larger CT26 shaft. You also need to machine the CT26 backplate slightly. The CT20B front cover just goes straight on with no mods. This "hybrid" turbo gives you the best of both worlds when it comes to toyota turbos and has been proven to be good for 350+ flywheel HP.
I had a hybrid made up for my GrpA and was happy with the results on 19psi. If i hadn't done the HG at Wakefield Park and gone crazy in the rebuild i would have just stayed with that turbo.
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On Probation
Location:
Sydney
Registered:
April 2005
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Location:
Canberra
Registered:
June 2003
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Re: differences in CT20b
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Mon, 02 May 2005 23:07
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Once again Ralfo you are totally off the mark...do you even know one end of a turbo from the other???
Those numbers are for the comp wheel NOT the turbine wheel. The comp wheel is larger as i said....the turbine wheel is so close in size not to make any difference but it is more heavily shrouded in the name of faster spool up time and from what i could measure (a difficult task) is a smaller a/r. The CT26 definitely has a better flowing hot side.
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On Probation
Location:
Sydney
Registered:
April 2005
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Location:
Canberra
Registered:
June 2003
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Re: differences in CT20b
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Mon, 02 May 2005 23:24
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You can think whatever you like. You are getting info 2nd hand off the web and on top of that you are interpreting it incorrectly.
I have had the 2 turbos side by side on my bench, pulled them both down and put together a Hybrid using the best bits of both.
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On Probation
Location:
Sydney
Registered:
April 2005
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Re: differences in CT20b
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Mon, 02 May 2005 23:34
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www.gt4oc.com These guys know what they are talking about.
I will almost only listen to them.
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Toymods Vice President
Location:
Sydney
Registered:
May 2002
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Re: differences in CT20b
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Tue, 03 May 2005 03:38
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Please if you only plan to listen to them then only spout their rubbish on their forum. Here we are far more interested in reality than rubbish theories that are never proven.
The problem is that you have no actual knowledge you just repeat what you are reading. This is where the misinformation comes from. What makes you think that the peoplc on gt4oc actually know about the topic and aren't just repreating incorrect information the same way that you have been ever since you signed up for this forum?
If you have legitimate information not just stuff you read on the net or heard off a mate then feel free to share it. If however you talk rubbish and then try and defend that rubbish as being correct then expect to get shot down.
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Location:
Brisbane
Registered:
May 2002
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Re: differences in CT20b
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Tue, 03 May 2005 04:58
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| JustenGT4 wrote on Tue, 03 May 2005 09:24 |
I have had the 2 turbos side by side on my bench, pulled them both down and put together a Hybrid using the best bits of both.
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| ralfross wrote on Tue, 03 May 2005 09:34 |
www.gt4oc.com These guys know what they are talking about.
I will almost only listen to them.
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Location:
Canberra
Registered:
June 2003
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Re: differences in CT20b
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Tue, 03 May 2005 05:10
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That might be just a bit too subtle to sink in Norbie 
Your thread seems to have been hijacked a tad SXY184...happy enough that your orig question been answered ?
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Registered:
January 2004
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Re: differences in CT20b
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Tue, 03 May 2005 09:02
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Hey Hey, is all good JustenGT4...hey that means i get to PM u for info ..  Hope that is ok , everyone has there opinions and they look like they tend to vary from peeps being shot down and grilled to the guys who actually know what doing ...they say experience is the best teacher...and if u dont know (like i didnt when i started this post) then jus ask!! thanks to all that replyed, oh and Ralfross, plz man u seem cool in person , jus dont believe everything u read,im not sayin your source of info is wrong , but im not sayin it right either !!
Cheers ~Richie~
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I supported Toymods
Location:
Perth, Western Australia
Registered:
December 2002
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Re: differences in CT20b
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Wed, 04 May 2005 05:40
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| JustenGT4 wrote on Tue, 03 May 2005 13:10 |
That might be just a bit too subtle to sink in Norbie
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Heheheheheheeee!
I'm currently putting a mongelised CT26 together for my ST185, I'll fully list all mods and power output in a new thread once it's done - I'd suggest everyone else with 3SGTE's/GT4's does too - we can then a have a good representative look at cause and effects with various mods.
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On Probation
Location:
Sydney
Registered:
April 2005
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I supported Toymods
Location:
Perth, Western Australia
Registered:
December 2002
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Re: differences in CT20b
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Wed, 04 May 2005 12:04
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Thanks for your offer, but I'm listening to my turbo builder, and one or two select individuals that I've met personally, both here in Perth, and over east too. Fortunately for us Perthites, the car culture is completely different over here, and a turbo that doesn't spool till 5000rpm, is a very very rare beast on the street!
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On Probation
Location:
Sydney
Registered:
April 2005
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Location:
Lost in the K hole
Registered:
May 2002
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Re: differences in CT20b
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Wed, 04 May 2005 12:43
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ok, that seems like a nice place t end this 
folks might want to take a look at this:
http://forums.toymods.org.au/index.php?t=msg&t h=28502&start=0&rid=92&S=27ae3290af05a 5aa40370c72e8457f23
* PLEASE do not simply regurgitate what you've overheard or read somewhere else, and call it your 'expert' contribution to a thread. Posts like this simply propagate misinformation. If you think you can refer someone to relevant web resources, by all means do so, but please do not make an independent 'statement of fact' about an issue unless you can substantiate it.
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