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Steven Nanevski
TryHard
NSW
JZZ30 Twin Turbo

Posts: 176
Reg: 07-2005

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Monday, February 20, 2006 - 04:58 pm, by:  Steven Nanevski (Imprestik) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Hey all,

Just wondering if it has been done before and results, looked around the forum and cant see anything.

Off the top of my head, prob be laggier, by how much???? Also would need to fabricate a manifold for them. Would also think I would need a decent ECU as well.

Anyone know any websites they can refer me to, or if people on here have done the conversion before, how are the benefits.

Reason being I can get a set for really cheap, and was thinking going a big single, but thats the flavour of the month, wanna try something different.

Thanks
Don Bagnall
Moderator
New Zealand
I have LESS Soarers than Hayden :-(

Posts: 2547
Reg: 05-2005

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Monday, February 20, 2006 - 05:37 pm, by:  Don Bagnall (Baggs) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Tripples?..............
Ryan Mason
TryHard
Victoria
Soarer TT-L

Posts: 117
Reg: 01-2006

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Monday, February 20, 2006 - 08:13 pm, by:  Ryan Mason (Ryan_m) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

CT12B's are the US-spec, steel wheeled 2JZ turbos. Did you have the JDM 2JZ Supra ones in mind?

I'm yet to hear of anyone who's got JDM 2JZ ones working correctly, most have experienced a massive surging problem, and yes, a custom manifold is needed, and your intercooler pipe would need to be modified to suit, as they don't line up directly.

Your best bet would be buying some US-Spec Supra ones from Titan Motorsports or SupraStore.com from the US, as they have twin wastegates and a much better turbos and better suited to the 1JZ engine.

Cheers, Ryan.
Don Bagnall
Moderator
New Zealand
I have LESS Soarers than Hayden :-(

Posts: 2578
Reg: 05-2005

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Monday, February 20, 2006 - 08:22 pm, by:  Don Bagnall (Baggs) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Excellent post there, Ryan!.
I can see that you'll be an asset to the Soarer community
Steven Nanevski
TryHard
NSW
JZZ30 Twin Turbo

Posts: 179
Reg: 07-2005

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Monday, February 20, 2006 - 09:21 pm, by:  Steven Nanevski (Imprestik) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Surging???

Sorry mate, what does that mean, and I guess the Aussie Spec supra have ceramic turbine wheels??

I understand, you could run 1 bar boost comfortably off Aussie spec 2JZ ones???
John Tibbs
Tinkerer
WA
JZA70 Supra

Posts: 68
Reg: 11-2005

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Monday, February 20, 2006 - 09:35 pm, by:  John Tibbs (Zombie) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)


Steven Nanevski wrote on Monday, February 20, 2006 - 09:21 pm:

Sorry mate, what does that mean, and I guess the Aussie Spec supra have ceramic turbine wheels??

I understand, you could run 1 bar boost comfortably off Aussie spec 2JZ ones???



there is no Aust spec JZA80 or for that matter 2JZ
Cihan Aday
DieHard
Victoria
JZZ30

Posts: 553
Reg: 07-2005

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Monday, February 20, 2006 - 11:43 pm, by:  Cihan Aday (Cihan) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

There's no reason twin CT12B's wont work with a 1JZ reasonably well (just dont expect to get them running sequentially). Custom exhaust manifolds and intake piping need to be made. You will start to have issues when trying to retrofit factory components that weren't made for the 1JZ.. Things like adaptor plates for manifolds and recycling of various components throughout the conversion.

JDM 2JZ-GTE Supra's have ceramic exhaust turbines, pretty much what applies to ct12a ceramic turbos is relevant.

Cheers,
Cihan.

ps. A good read regarding surge;

Typically, surge occurs immediately after the throttle plate is closed while the turbocharger is spinning rapidly, such as between shifts or when decelerating. During surge, air pressure increases between the throttle body and the compressor, which reduces the air flow at the compressor. If the air flow falls below a certain point, the compressor wheel (the impeller) looses its "grip" on the air. Consequently, the air in the compressor stops being propelled forward by the impeller and is simply spinning around with the wheel, which is still being rotated by the exhaust gas passing through the turbine section. When this happens, the pressure build-up at the discharge opening forces air back through the impeller causing a reversal of air flow through the compressor. As the back pressure eventually decreases, the impeller again begins to function properly and air flows out of the compressor in the correct direction. This sudden air-flow reversal in the compressor can occur several times and may be heard as a repetitive "WHEw Whew whew" noise if the surge is mild to a loud banging noise when surge is severe. Surge should be prevented at all costs because it not only slows the turbocharger wheels so that they must be spooled back up again but because it can be very damaging to the bushings or bearings and seals in the center section of the turbo.
http://www.stealth316.com/2-bov1.htm
Chris Davey
TryHard
QLD
Corona

Posts: 406
Reg: 07-2005

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Tuesday, February 21, 2006 - 11:17 am, by:  Chris Davey (Chris_davey) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

there was a guy on toymods running 2jz turbos on a 1jz. I don't know if they were JDM or USDM though? Definitely had custom piping though.

Have a search through readers rides section for a mx83 1jz at
www.toymods.org.au
Blake Gloyn
Tinkerer
manawatu
soarer JZZ30 TT

Posts: 8
Reg: 02-2006

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Sunday, May 28, 2006 - 09:39 am, by:  Blake Gloyn (Blakenz) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

i have run ct12B jap spec turbos on my 1jz. i adapted the 2jz manifold to the 1jz head. oil lines needed lengthening from memory. Unfortunately,my turbos had been reconned with steel wheels,which meant they were slower to spool up than the factory ones. too laggy for an auto if you wanted to drag.but big power for a road car. boost started at 2800rpm. only one wastegate,so i bored it out to 29mm from 25mm,to help control boost. CT12B turbos(ceramic) are much more reliable than CT12 A. Providing you run them in parallel,not sequential.My car never got to dyno,due to blowing motor at drags, but my terminal speed was higher than two supras that pulled 245 rwkW and 260 rwkW the next day on the dyno.so i estimate about 270 -280 rwkW at 20 psi.you may think this seems high,but all the sequential stuff was removed and allows much less restriction.Looked pretty standard under bonnett too. This would be great on a manual car. would have loved to try the ceramic wheels to see if they were less laggy.sold my complete kit. ended up in melbourne i think.
Blake Gloyn
Goo Roo
manawatu
soarer JZZ30 TT

Posts: 1054
Reg: 02-2006

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Sunday, January 05, 2014 - 07:53 am, by:  Blake Gloyn (Blakenz) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

And there was NO custom piping required. The plastic intake pipe from the air box can be fitted onto the 2jz cold pipes, and the rubber intercooler hose that runs to the inner guard attaches to the hot merge pipe. It really does look quite factory under the bonnet, especially if you use the supra factory blow off valve also.
As an aside, i ran 430cc 2jzgte injectors, which gave air fuel ratios of 11.3:1 at 20psi. The engine blew, we think, because of a wiring/earthing fault. It caused the base timing to be 10 degrees more advanced than proper specs!
(this thread revived due to enquiry via PM)

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