996 Turbo / GT2 Turbo discussion on previous model 2000-2005 Porsche 911 Twin Turbo and 911 GT2.

EPL/Tial Alpha 28rs turbos installed

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Old Jul 25, 2009 | 08:01 AM
  #121  
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what was the final outcome on the gt28 vs k24/18g TIPTRONICS?
 
Old Jul 25, 2009 | 03:24 PM
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Tial-can you educate us all on the various "28" turbos? My understanding is that there was a GT28 Hybrid (mated to a K16 hotside) for Evo, then there are standard GT28's that don't bolt on to Porsches unless adapted. Then there was a Journal Bearing vs. Ball Bearing evolution-both are still sold I understand. Then I understand that you built a new SS housing to that would bolt on to Porsches and sold it exclusively through Evo for roughly a year. Once that exclusive was released, the turbos hit the open market (recently) and they've been rebranded the Alpha series? Were other mods done to them as well? What's the evolution? It seems as if the latest and greatest are really the hot setup (A28's) these days offering quick spool and equal or greater than top end potential to a 24/18 hybrid...

What about the differences between 2860's and 2871's?

My mind is boggled trying to figure out what is out there. I think it would serve everybody (including Tial and it's tuning partners) to share the story and evolution so that we can purchase the best possible solution for our needs... The secrecy and guessing game gets old. Educated consumers purchase more freely!

What's the scoop????

Thanks in advance!
 

Last edited by Kato; Jul 25, 2009 at 03:26 PM.
Old Jul 25, 2009 | 04:45 PM
  #123  
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Originally Posted by PAULIEWALNUTS
Don't worry Todd I will run a better time than yours when I have the same weather as you did when you ran a 6.9.The 7.2 was on pump.
Banjo Boy,

I have been listening to this sad tired lament for nearly a year and a half!!

Get a decent verified time and prove that that 5 lengths walking I gave Tweety was an exception, not the rule.

Until then I have composed a song: To the tune of Dueling Banjoes

Da duh doon doon doon doon doon doon doon

Paulie (squeeling like a pig): "But it was hot."

Da doon doon dooon doon doon da

"But I was on pump"

Doon doon doon doon da doon da doon...
 
Old Jul 25, 2009 | 05:21 PM
  #124  
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Originally Posted by Kato
Tial-can you educate us all on the various "28" turbos? My understanding is that there was a GT28 Hybrid (mated to a K16 hotside) for Evo, then there are standard GT28's that don't bolt on to Porsches unless adapted. Then there was a Journal Bearing vs. Ball Bearing evolution-both are still sold I understand. Then I understand that you built a new SS housing to that would bolt on to Porsches and sold it exclusively through Evo for roughly a year. Once that exclusive was released, the turbos hit the open market (recently) and they've been rebranded the Alpha series? Were other mods done to them as well? What's the evolution? It seems as if the latest and greatest are really the hot setup (A28's) these days offering quick spool and equal or greater than top end potential to a 24/18 hybrid...

What about the differences between 2860's and 2871's?

My mind is boggled trying to figure out what is out there. I think it would serve everybody (including Tial and it's tuning partners) to share the story and evolution so that we can purchase the best possible solution for our needs... The secrecy and guessing game gets old. Educated consumers purchase more freely!

What's the scoop????

Thanks in advance!
Very good questions Kato. Your understanding of the evolution of these turbos is close to mine, but my understanding is that these newer "alpha" series turbos are different and improved from any previous version of the same name. But maybe I just think that because I want them to be that way since I bought them.

Privacy for sake of competitive reasons is understandable, but I, like you, would like to have some more details without anyone giving up trade secrets....
 
Old Jul 25, 2009 | 10:23 PM
  #125  
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Very nice results!! Those alpha series kick major a$$
 
Old Jul 26, 2009 | 02:15 AM
  #126  
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I have asked Tial to do the exact thing you are asking, but the guy flaked over and over again.

As great as the product is, they could really do a better job of explaining and marketing it.

My understating is that the difference between a 60 and 71 is that the 71 has a larger compressor (cold side). Think K24/18g vs K24/20g

Originally Posted by Kato
Tial-can you educate us all on the various "28" turbos? My understanding is that there was a GT28 Hybrid (mated to a K16 hotside) for Evo, then there are standard GT28's that don't bolt on to Porsches unless adapted. Then there was a Journal Bearing vs. Ball Bearing evolution-both are still sold I understand. Then I understand that you built a new SS housing to that would bolt on to Porsches and sold it exclusively through Evo for roughly a year. Once that exclusive was released, the turbos hit the open market (recently) and they've been rebranded the Alpha series? Were other mods done to them as well? What's the evolution? It seems as if the latest and greatest are really the hot setup (A28's) these days offering quick spool and equal or greater than top end potential to a 24/18 hybrid...

What about the differences between 2860's and 2871's?

My mind is boggled trying to figure out what is out there. I think it would serve everybody (including Tial and it's tuning partners) to share the story and evolution so that we can purchase the best possible solution for our needs... The secrecy and guessing game gets old. Educated consumers purchase more freely!

What's the scoop????

Thanks in advance!
 
Old Jul 26, 2009 | 10:01 AM
  #127  
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IMO, tuners can only tell you the advantage of their products. I have a feeling that they are prohibited to compare their products with others due to some agreements on this board. So, you really have to do your own research.
 
Old Jul 26, 2009 | 03:32 PM
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I've said this before and I'll say it again. I may not know exactly what is different from these newer alpha turbos, but I have never seen any other version of the GT28 or older alpha turbos put up a dyno curve that resembled anything close to this. And this is what got me to buy, along with Tony's recommendation. But he did say I would be happy with k24/18g also, FYI, so the choice was ultimately mine. I mean, is this dyno perfect for a street car or what? (he's got a few more mods than I do but the same identical turbos)

 
Old Jul 26, 2009 | 03:41 PM
  #129  
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Over 6oo lb of torque by 3.5K, wow, no lag on that car. Was this on pump?
 
Old Jul 26, 2009 | 03:59 PM
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Very nice graph. No dips, quick spool, great TQ and power level. Congrats!!!
 
Old Jul 26, 2009 | 03:59 PM
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Originally Posted by Dr_jitsu
Over 6oo lb of torque by 3.5K, wow, no lag on that car. Was this on pump?
93 octane with meth... see here:

https://www.6speedonline.com/forums/...-finished.html
 
Old Jul 26, 2009 | 04:01 PM
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Originally Posted by art4iza
Very nice graph. No dips, quick spool, great TQ and power level. Congrats!!!
Yeah I hope my graph looks something like that when I get dynoed eventually. I need some other supporting mods tho... might do meth at some point.
 
Old Jul 26, 2009 | 04:10 PM
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Originally Posted by flash68

So Dr.J, that would be the same as running a race file with 109. So to answer his question, no, not a pump file.
 
Old Jul 26, 2009 | 07:16 PM
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Originally Posted by Prche951
So Dr.J, that would be the same as running a race file with 109. So to answer his question, no, not a pump file.
not sure everyone agrees with that statement but.......

race or gas or not, I still haven't seen any other 28-based turbos with that kind of dyno curve.

It's just nice you don't have to spend $15k+ to get this kind of power anymore.
 
Old Jul 26, 2009 | 07:19 PM
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Originally Posted by flash68
not sure everyone agrees with that statement but.......

race or gas or not, I still haven't seen any other 28-based turbos with that kind of dyno curve.

It's just nice you don't have to spend $15k+ to get this kind of power anymore.

don't get me wrong, I like the idea and would like to do it myself, anytime you can run 1.4-1.5 bar of boost, you are on race file mode.

check this out

https://www.6speedonline.com/forums/...17-octane.html
 


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