CT20B GTX3071R Hybrid

Q&A regarding engines, turbos, and intercoolers and power upgrades

CT20B GTX3071R Hybrid

Postby HIRISK » Thu Jul 31, 2014 10:46 am

Hi All,

I just thought some of you may be interested to see a turbo that I have just had built for my ST185 GT-Four Group A.

I had GCG in Sydney, Australia build this for me.

Specs are as follows...

Garrett GTX3071R billet compressor wheel (52.95mm inducer and 71mm exducer)
Larger Inconel turbine wheel
High flowed compressor housing
High flowed turbine housing
New core
Turbosmart billet wastegate actuator

It will be very interesting to see how it performs.

I can't wait to get it on the car.

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Re: CT20B GTX3071R Hybrid

Postby anothergt4 » Thu Jul 31, 2014 1:21 pm

Are you willing to share what the cost was? Very interested in seeing how it turns out, what are your goals as far as power?
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Re: CT20B GTX3071R Hybrid

Postby Overtriped » Thu Jul 31, 2014 2:33 pm

Wow that looks really nice, let us know how she does!
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Re: CT20B GTX3071R Hybrid

Postby aus jd 2703 » Thu Jul 31, 2014 6:46 pm

So what are your A/R's?
Is it ball bearing?
Very curious how this goes as GCG offered this when I bought my GTX2867 so I'm wondering if I made the right decision
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Re: CT20B GTX3071R Hybrid

Postby CSAlltrac » Thu Jul 31, 2014 7:26 pm

That looks great! You dont need that, go ahead and send that my way :P Do make sure you post results. I too am interested in costs.
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Re: CT20B GTX3071R Hybrid

Postby CMS-GT4 » Thu Jul 31, 2014 9:21 pm

How long do they guarantee the turbo? I have heard mixed reviews on toyota rebuilt turbos. I want to see the results.
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Re: CT20B GTX3071R Hybrid

Postby HIRISK » Fri Aug 01, 2014 1:16 am

Hi Guys,

I supplied GCG with the CT26, it was then rebuilt using a brand new core, not just a reco of the existing core.

On top of this, it received a brand new inconel turbine wheel and brand new billet GTX3071R compressor wheel.

So, apart from the actual and exhaust housings, it is all new.

This all cost $1,400UD.

It is NOT ball bearing. I could have upgraded to ball bearing but that would have cost me another $600AUD.

I then paid an extra $400AUD to have a billet Turbosmart wastegate actuator custom fitted.

So $1,800AUD all up.

I can't wait to get it installed and dyno tuned.

I am unsure what warranty it comes with, I will have to read all the paperwork it comes with.
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Re: CT20B GTX3071R Hybrid

Postby mx6er2587 » Tue Sep 02, 2014 4:18 pm

any particular reason you wanted to stay with a Toyota style housing?
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Re: CT20B GTX3071R Hybrid

Postby CMS-GT4 » Tue Sep 02, 2014 4:45 pm

I am curious if you had it on the dyno yet?
Coldiron
92 st185 (205 swap) | 03 350Z Track (sold) | 13 Pilot | 17 Mazda3
www.noritoy.com | noritoy.deviantart.com | http://www.alltrac.net/phpBB2/viewtopic.php?f=44&t=19891
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Re: CT20B GTX3071R Hybrid

Postby HIRISK » Tue Sep 02, 2014 10:52 pm

Hi All,

I have done around 250km since the turbo was installed and all is going really well.

I am only running 15psi at present as I have a really crappy 2" exhaust from the Berk 3" dump back.

I have a new Blitz Nur Spec RX on its way which will be on the car soon.

Once the new exhaust is installed I will get it on the dyno.

But for the now, I can tell you the car feels very strong and still very responsive.

I can't wait to get it on the rollers and see what it makes.
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Re: CT20B GTX3071R Hybrid

Postby fwame_dwagon » Fri Sep 05, 2014 1:19 am

wow this is awesome. can kinda be a stealth upgrade. looks stock to the untrained eye.
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Re: CT20B GTX3071R Hybrid

Postby littlemissalltrac » Fri Sep 05, 2014 11:42 pm

im VERY interested in the dyno graph on this thing to see where the power hits. That is a very beautiful turbo though, hope it performs awesome for you!
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Re: CT20B GTX3071R Hybrid

Postby CMS-GT4 » Fri Nov 28, 2014 5:07 am

Ats and a couple other places are building these now in the states. Looks like one mr2 made 400 with theirs. One got posted on Facebook that uses an anti surge housing. Waiting on more dyno numbers but I have a feeling this is the route I will go.
Coldiron
92 st185 (205 swap) | 03 350Z Track (sold) | 13 Pilot | 17 Mazda3
www.noritoy.com | noritoy.deviantart.com | http://www.alltrac.net/phpBB2/viewtopic.php?f=44&t=19891
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Re: CT20B GTX3071R Hybrid

Postby HIRISK » Sun Nov 30, 2014 2:52 am

Hi All,

Not a huge amount to report at this stage.

I have replaced the exhaust system and have had the car on the dyno.

But I have not been able to do proper power runs as after 5,400rpm it leans out to much.

The Turbosmart billet wastegate actuator is set at 15psi but I am getting bad boost creep to 19psi.

Remember, I am running stock fuel pump, injectors, and ECU too.

So at this stage I have managed to make 146kw / 196hp at 4 wheels @ 5,400rpm.

I am investigating the boost creep and suspect an issue with the wastegate flap not opening all the way up, but I just have not had a chance to do this investigation yet.

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Re: CT20B GTX3071R Hybrid

Postby klue » Mon Dec 01, 2014 2:36 am

definitely want to upgrade the fuelpump and wiring to it
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