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Old May 23, 2009 | 09:47 PM
  #1  
blueice288's Avatar
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T04Z Turbo

Hi Guys,
have anyone heard about a T04Z turbo by Garrett? If yes how does that compare to the HTA86?

http://www.atpturbo.com/Merchant2/me...egory_Code=BCS

that is the link for the turbo... let me know what you guys think about it compare to the HTA86
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Old May 23, 2009 | 11:09 PM
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A T04Z is what we refer to as a T67, or, a T67R when it has the ball bearing CHRA. This turbo has been around for quite some time.

As compared to an HTA86, it will spool a little slower and its ultimate power potential will be somewhat comparable.
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Old May 24, 2009 | 08:02 AM
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Doesn't HKS make a T04Z as well?

Simon Norris uses this turbo a lot and so I'd like to believe this turbo might be something special and possibly outperform a 35r.
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Old May 24, 2009 | 08:28 AM
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Yes, HKS' version has nominally different compressor and turbine wheels, and a ridiculously hefty pricetag. The one in the ATP website as noted in the OP is the Garrett. I have one sitting on the shelf right here, ready to go to someone who needs it.
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Old May 24, 2009 | 11:16 AM
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Is the HKS T04z a good turbo for street use?
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Old May 24, 2009 | 11:22 AM
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I wouldn't even consider it when better, less expensive options exist (e.g. HTA series 35Rs).
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Old May 24, 2009 | 11:26 AM
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Its old and out dated. I would never use a T04Z these days when you can get a Precision 6765 for the same price and make better power. If you get the 6765 billet you get a ton more power and better spool.
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Old May 24, 2009 | 11:32 AM
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I am with everyone else. The T04Z was worth talking about 3-5 years ago. My god not now. There are much better options out now as mentioned already.
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Old May 24, 2009 | 12:32 PM
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I got one from a friend that is barely used for a $1000
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Old May 24, 2009 | 07:02 PM
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Had anybody here who is dismissing the T04Z tested one? Or even seen a test done with say a 35R back to back?

Here is a quote from a respected member of the MLR:

After our second day on the Norris dyno yesterday with our new turbo set up we are very happy.
Just to remind you this a 2.2 stoker with a T04Z turbo and Shearer manifold. The figures even amazed the mighty Si.
770 BHP and 605 lb ft toque
Doesn't sound like a crappy turbo to me!

And here is a quote from Simon himself:

Just a quick spec for anyone who is interested in it; It is a long rod 2.0 (156mm rod) with an all new ND T04Z turbokit, same as usual ND spec head etc.....

It made 625Hp and 515LbFt (2.3Bar Boost) with FULL boost by 4000Rpm and rev limit at 8500Rpm, but the best thing is it suffers from ZERO surge unlike the GT35R, due to this fact it actually makes full boost earlier than the GT35R. Its a test spec I wanted to try to improve high rpm power and reduce/eliminate surge, operation complete!

We are now selling these kits to the public and have already sold some!

With a JUN inlet manifold this spec made 650Hp and 530LbFt (Super Unleaded) with SAFE ignition timing, I expect it to make more on a stroker and approx 100Hp and 100LbFt more on VP Import.

Cheers all

Si
And Ted you keep mentioning HTA 35R versus a normal 35R... are you convinced there is a big difference between the two? I tested both back to back when Mark was down here. No significant difference.
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Old May 24, 2009 | 11:59 PM
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I wouldn't call the HKS turbo crappy at all. I don't think the word "crappy" should enter the picture until the price is mentioned.

Am I convinced there is a big difference between a 35R and the HTA3582R that I have now? I've had both on my car, and the HTA3582R is far more responsive. But then again, my HTA is a twinscroll setup, so that undoubtedly accounts for a good part of the difference.
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Old May 25, 2009 | 12:47 AM
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Originally Posted by crcain
Had anybody here who is dismissing the T04Z tested one? Or even seen a test done with say a 35R back to back?

Here is a quote from a respected member of the MLR:



Doesn't sound like a crappy turbo to me!

And here is a quote from Simon himself:



And Ted you keep mentioning HTA 35R versus a normal 35R... are you convinced there is a big difference between the two? I tested both back to back when Mark was down here. No significant difference.

750whp is very attainable from the T04z turbo. Honda guys have been using 67mm turbos for quite a few years, and making silly power in the process. The P-trim turbine wheel though, is not really up to modern day standards as far as overall efficiency is concerned. You have to remember, this turbo has been around the block and back as far as age is concerned.

As for what Mr. Norris said, I would love to see ANY 2.0 motor spool a 67mm and achieve full boost by 4000 rpm.(go ask any of the b20 Honda guys) I have personally seen these turbos on stroker Evos only begin to spin up at 4k, and not make real boost until upwards of 5500 rpm. The result is a lazy, top end biased powerband. Just my .02 worth.
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Old May 25, 2009 | 01:24 AM
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r we taking about t4z or the t4z88hta ...
if its t4z88hta than i highly recomend this turbo ...
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Old May 25, 2009 | 01:33 AM
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Originally Posted by haseeb
r we taking about t4z or the t4z88hta ...
if its t4z88hta than i highly recomend this turbo ...

The turbo in reference in the first post is NOT an HTA88. Just a plain jane 67mm T04z.
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Old May 25, 2009 | 08:39 PM
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I have a TS HTA86 by ETS at the moment and i get 40psi at about 5000rpm. Works good for me so far but you know we all can do with a bit more power if we can get it. Unfortunately where i am in south america we have no access to dyno so we do not know how much power of if we can amke more power on the tune. Is there anyone out there that can give me a 2nd opinion on the tuning from my log file and cal file?
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