Soarer Central: Archive through July 29, 2007

Soarer Central Mechanical - TT Turbo Talk I'm Going To Buy A New Turbo...But Which One? Archive through July 29, 2007

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Byron Clarke
TryHard
NSW
VVTi Turbo Manual

Posts: 260
Reg: 12-2006

Rating: N/A
Votes: 0 (Vote!)

Tuesday, July 24, 2007 - 09:45 pm, by: Byron Clarke (Byron)

I'm starting to seriously consider buying a garrett turbo for my car and I need advice from you guru's so i don't make the wrong choice.

CAR DETAILS:
*1996
*Single Turbo
*Manual
*VVTI
*Stock ct15B turbo still in (and I have had not a single problem with it but I have the thirst for power).
*~96, 000k

TURBOS I AM CONSIDERING

GT3071 - http://www.turbobygarrett.com/turbobygarrett/catelog/Turbochargers/GT30/GT3071R.htm
GT3267 - http://www.turbobygarrett.com/turbobygarrett/catelog/Turbochargers/GT32/GT3267_452233_5.htm
GT3582 - http://www.turbobygarrett.com/turbobygarrett/catelog/Turbochargers/GT35/GT3582R_714568_3.htm

Obviously my concern with the 35 is the turbo lag it's going to incur.

At the moment with my vvti the most power is from the late 2000's and is dying off at 4000rpm. I don't mind shifting the power band up 500 - 800rpm (because I'd prefer some more power up high in the rev range.

I've also noticed that the above link for the gt3267 appears to have a lower max hp rating than the gt3071. Is that because it is not a ball bearing turbo?

So I think it may be wise I go for the 30 but I was curious to know what you all think.

Finally (whew sorry everyone) I had a talk to Marc Vipond about those AR numbers and I believe the 1.06 will have most lag yet most power up high whilst the 0.63 will have least lag but less power up high.

So does this mean that a GT3071 with 1.06 AR will still have less lag than a GT3582 with the same 1.06 AR?

Keep in mind this is my daily driver and I work in real estate so I still have to be able to drive the car in a sane manner...

Thank you all for reading this far and thank you in advance for any advice!

Daniel Clarke
Goo Roo
NSW
TT 2.5L 6 cylinder

Posts: 2066
Reg: 03-2006

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Votes: 0 (Vote!)

Tuesday, July 24, 2007 - 10:35 pm, by: Daniel Clarke (Dieseltrain)

A good Single with good power AND response and been proven by Ben B is the GT3076R ( bout 470-500 rated hp).. Im sure Ben is using the 0.86 housing on his...

Bloody fast, Bloody good results with a factory engine! Has seen just over 300rwkw on a tough dyno!

I would consider that in a flash for a single.

Yang Luo
Goo Roo
vic
soarer steel wheel or t3g?

Posts: 1017
Reg: 04-2006

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Wednesday, July 25, 2007 - 11:33 am, by: Yang Luo (Steven)

are these turbo too big? how about ct20? make better performance and looks like factory turbo. like t3g turbos

Chris Davey
Goo Roo
QLD
Corona

Posts: 1414
Reg: 07-2005

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Wednesday, July 25, 2007 - 12:01 pm, by: Chris Davey (Chris_davey)

ct20? as in a stock 2jz turbo? No.

As Daniel said, I think Ben has proven without a doubt that the GT3076R is just about the perfect turbo for a balance between response and power. Knocking on the door of a 10 second pass with full boost by 4000rpm is bloody good in my books.

GT3071 is too small. Better on a 2L.
GT3267 appears to be a POS

GT3582 if you want to make WELL over 300rwkw as in closer to 350rwkw with good fuel and tune.

Byron Clarke
TryHard
NSW
VVTi Turbo Manual

Posts: 262
Reg: 12-2006

Rating: N/A
Votes: 0 (Vote!)

Wednesday, July 25, 2007 - 01:06 pm, by: Byron Clarke (Byron)

Yang Luo wrote on Wednesday, July 25, 2007 - 11:33 am:
and looks like factory turbo

I don't want my turbo to look factory I want people to see it and say Holy •••• he has a garrett

Yeah I just noticed the gt3076 afterwards, it seems like the go for sure. I agree the 3267 definately seems useless and the 35 is probably too much commitment (tune wise) and lag.

So can anyone advise me on AR? is 1.06 too big for my car on a gt3076? Coz I want the biggest but not if it's gonna be laggy.

Here is the link for the GT3076 Incase anyone wants it - http://www.turbobygarrett.com/turbobygarrett/catelog/Turbochargers/GT30/GT3076R_700382_12.htm

Vinh Bui
Goo Roo
NSW
94 UZZ31 (V8) / 96 JZZ30 (TT) / 97 JZA80 (TT)

Posts: 1868
Reg: 07-2005

Rating: N/A
Votes: 0 (Vote!)

Wednesday, July 25, 2007 - 01:10 pm, by: Vinh Bui (Hyudsjk)

Yep, I'd say go for the 3076R Byron with a 0.8x housing.

Byron Clarke
TryHard
NSW
VVTi Turbo Manual

Posts: 263
Reg: 12-2006

Rating: N/A
Votes: 0 (Vote!)

Wednesday, July 25, 2007 - 01:12 pm, by: Byron Clarke (Byron)

you think I will still get considerable power up over 4000 with a 0.83 housing? And AR doesn't stand for Aspect Ratio does it?

Chris Davey
Goo Roo
QLD
Corona

Posts: 1415
Reg: 07-2005

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Wednesday, July 25, 2007 - 01:29 pm, by: Chris Davey (Chris_davey)

Aah yes. All the way to about 7300rpm on stock cams actually.

Seriously, go and look at Ben Burgess's dyno chart and the boost response curve he has datalogged. As I said, probably the best all round turbo for 1jz unless you want to run 9's

Vinh Bui
Goo Roo
NSW
94 UZZ31 (V8) / 96 JZZ30 (TT) / 97 JZA80 (TT)

Posts: 1870
Reg: 07-2005

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Wednesday, July 25, 2007 - 02:30 pm, by: Vinh Bui (Hyudsjk)

My friend has one with a 0.86 AR strapped onto the side of his SR20 motor, and it goes pretty well for a 2.0L. He has even hit the almighty 300rwkw with it. I'd imagine one of these babies on a 2.5L 1JZ would totally rock with the right supporting mods.

Marc Vipond
TryHard
Queensland
JZZ30 GT35R

Posts: 410
Reg: 05-2006

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Wednesday, July 25, 2007 - 06:08 pm, by: Marc Vipond (04awe)

Yeah having a soarer with a a Gt35r would be well stupid especially with a 1.06 rear end on it

Go the Gt3071r with the .82 rear end it is the perfect turbo for your application

Joe Radisic
TryHard
WA
2JZ GTE

Posts: 344
Reg: 10-2006

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Wednesday, July 25, 2007 - 06:21 pm, by: Joe Radisic (Joe)

And get a stall convertor it also changes everything!!!

Byron Clarke
TryHard
NSW
VVTi Turbo Manual

Posts: 264
Reg: 12-2006

Rating: N/A
Votes: 0 (Vote!)

Thursday, July 26, 2007 - 02:09 pm, by: Byron Clarke (Byron)

What does a stall converter actually do and are they for manual cars???

Joe Radisic
TryHard
WA
2JZ GTE

Posts: 346
Reg: 10-2006

Rating: N/A
Votes: 0 (Vote!)

Thursday, July 26, 2007 - 03:05 pm, by: Joe Radisic (Joe)

Auto trans only sorry I didn't see you had a manual. Good luck anyway !!

Cihan Aday
Moderator
etuner.com.au
JZZ30

Posts: 2046
Reg: 07-2005

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Thursday, July 26, 2007 - 11:58 pm, by: Cihan Aday (Cihan)

Byron, i'd consider a 3071R with 0.63ex housing depending on the power level you're looking at achieving and what size wastegate you plan on running.

There are kits available for the vvti 1JZ, the best of them come with 600hp GT30R compressor, using the 0.63ex housing and are rated to 300rwkw.

I'll be working on a 1JZ vvti with such a kit + PFC in the next month, if you're interested i'll keep you updated

Byron Clarke wrote on Tuesday, July 24, 2007 - 09:45 pm:
Finally (whew sorry everyone) I had a talk to Marc Vipond about those AR numbers and I believe the 1.06 will have most lag yet most power up high whilst the 0.63 will have least lag but less power up high.

Its true while you're building boost, but once peak boost arrives an adequate wastegate and proper manifold design will relieve any restriction the turbine side imposes.
Look at the way Audi and other manufacturers do their turbo setups. The aftermarket still has a lot to learn.

Keep it responsive and you won't look back.
If you've got 160rwkw now, 280rwkw and 600nm of torque at 3500rpm is like oiling up the road.

Benjamin Burgess
Goo Roo
NSW
Toyota Soarer GT-TL, Toyota Corolla Conquest

Posts: 1467
Reg: 07-2005

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Friday, July 27, 2007 - 09:16 am, by: Benjamin Burgess (Jampac)

I'll post my details here if you haven't already found them.

The latest dyno graph, which is a little dated now,

http://soarercentral.com/sc-forum/messages/287/145101.jpg

The boost vs rpm graph for a 3rd gear pull on the street. This is also little dated. It is even more responsive now.

http://bburgess.gallery.netspace.net.au/albums/GT30Turbo/powerfc_boostvsrpm.gif

I run the 0.82 a/r exhaust housing.

Seeing as your in NSW, you're welcome to a drive around if you like.

Marc Vipond
TryHard
Queensland
JZZ30 GT35R

Posts: 415
Reg: 05-2006

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Votes: 0 (Vote!)

Friday, July 27, 2007 - 02:58 pm, by: Marc Vipond (04awe)

Cihan Aday wrote on Thursday, July 26, 2007 - 11:58 pm:
Look at the way Audi and other manufacturers do their turbo setups. The aftermarket still has a lot to learn.

Keep it responsive and you won't look back.
If you've got 160rwkw now, 280rwkw and 600nm of torque at 3500rpm is like oiling up the road.

I dunno man I reckon that the aftermarket scene is aiming at a completely different set of goals than manufacturers so comparing the two is stupid. You got it nailed with responsiveness though, trying to get mine to be a little more responsive without compromising my top end power.