Stock twins replacement/upgrade - Hybrid GT28R's - Page 4

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Thread: Stock twins replacement/upgrade - Hybrid GT28R's

  1. #76
    GO 'Cats! bonz's Avatar
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    You may want to PM him.

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  3. #77
    SupraForums Member SoCalDawg's Avatar
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    This hybrid setup looks great! I am already set to receive a set of the "1st stage upgrade" type, but this might be my next move in the future.

    Stu, what are the dimensions of the GT28R's from compressor inlet#1 to inlet#2? The same as factory (I hope..)? With the lengthened actuator rods it leads me to think the turbos are spaced further apart maybe?

    Thanks again for all your hard work! I am sure the entire community thanks you as well!! This just might be the answer to bigger, upgraded turbos in Cali that still pass smog testing!!

    Regards,
    Milo Whitson

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  4. #78
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    Stu,

    you stated in a previous post that the GT28R's turbos with a shot of nitrous maybe able to break 700hp although it wouldnt last long. How about 600rwhp? What that be possible on alky/water injectior or race gas running 24psi? Would running 24psi everyday shorten the life of these turbos? What kind of cams would you recommend with these twins? At what rpm do you suspect the GT28R's to run out of breath? Lastly will any 3"dp fit these turbos and what kind of intake would fit these turbos? Sorry for all the questions but im trying to get as much info as possible.

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  6. #79
    SAP R/3 Guru 2DIE4's Avatar
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    Read this again and you get your answer first hybrid had oem shaft and made 630+ with a NOS sjoot the "new" upgraded T28R will have a30% bigger shaft and approx. provide 20% more power over the first hybrid so if you just make a assumption 530*1,20= 636 rwhp *1,20=700+ at the crank this is of course just an approx. and presume that the power rise linear which probably isnt completely true but at least give some kind of indication of what the turbos can produce power wise.

    So in came Aaron, a member here, and a turbo engineer with GE. He and I collaborated and he came up with the first beta series T30 60mm turbos.
    http://97supraturbo.com/New%20Turbo%...OEM-Hybrid.JPG
    I supplied most all the materials Aaron had the hybrids made. These are currently on my car as we speak. They have made 501 whp in Vegas, and 534 whp here where I live. Both were just about at 20psi. (all this in my original thread from a year ago). We have about 20 sets out there still being tested. There has been a 630+whp on these with an undisclosed shot. His turbos have since bit the dust (he ran them at 28psi) So the limits to these are around 22-24 psi safely. The good news is there value, the downside is they still use the OEM shaft and turbine. I have literally beat the crap out of these and they are still doing very well. 3 HPDE and several drag runs with no issues. My minimum boost is 17.6 and maximum is 22 psi. These are true "drop-in" turbos. What I mean is removing the band clamps/oil and water lines, and your done.
    Then came another turbo builder who had made a trial set of turbos with a true drop in GT28R set of cartridges. These require a lot more work to install since these no longer use the band clamp installation, and do not use OEM water and Oil lines. This individual knows turbos quite well. They use the same OEM compressor housing and all other stock piping, etc. The EBV and WG actuators are modified slightly because they no longer use the same "flappers". Other than that, completely stock looking.

    The first beta tester for these goes by "hammerhead" here on the forums. He has made a custom manifold that would compliment these turbos. He also is doing a mock up set of oil and water lines. Hopefully he will be done soon and provide some dynos based on his level of mods. I should have mine installed by September. We are going to make several sets for testing. Right now, I have sent in 12 sets. Hopefully there will be more interest and we can some of these out there instead of myself and hammerhead. PM me for further details.

    Here again are what the GT28R look like.http://97supraturbo.com/GT28R%20Turb...Conversion.pdf

    These have been balanced to 24psi. They have a 33% larger shaft, and a larger Turbine. Estimate output is about 20% more than the ones I have now. This maybe a little lower with lesser mods than myself. Again, its all really unknown until more people start providing dynos, etc.
    Keep in mind that these will probably be twice the cost as the ones I am currently running. So these, once marketed by someone, will be pushing the "single" cost factor. So they won't appeal to everyone. I should also mention that both these set-ups will run sequential. I cannot vouch for these new GT28R's as yet, as far as how well they perform sequential, but they are designed to run sequential. Although they could run TTC as well.

    In conjunction to upgraded turbo's, I have also designed a small electronic #1 turbo boost controller that plumbs into the stock EBV VSV location. It basically will control the stock VSV to operate at different adjustable thresholds than how the OEM ECU controls it now. No extra hose routings required. It can adjust the boost levels from 10 -18 psi. Hopefully I will have these available at Speedforsale in a month or so. Just need testing
    Quote Originally Posted by Shabib67 View Post
    Stu,

    you stated in a previous post that the GT28R's turbos with a shot of nitrous maybe able to break 700hp although it wouldnt last long. How about 600rwhp? What that be possible on alky/water injectior or race gas running 24psi? Would running 24psi everyday shorten the life of these turbos? What kind of cams would you recommend with these twins? At what rpm do you suspect the GT28R's to run out of breath? Lastly will any 3"dp fit these turbos and what kind of intake would fit these turbos? Sorry for all the questions but im trying to get as much info as possible.
    A evil Protomotive Beetle :-).
    EU-Spec. 6-speed Supra MKIV aka Eagle II.

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    Okay seems like 600rwhp is very possible which is freaking sweet considering what a powerband it will be. However i would still like Stu to comment on my other questions.

  8. #81
    SAP R/3 Guru 2DIE4's Avatar
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    Of course just wanted to help and they seem very sweet the T28R Godzilla version :-).
    Quote Originally Posted by Shabib67 View Post
    Okay seems like 600rwhp is very possible which is freaking sweet considering what a powerband it will be. However i would still like Stu to comment on my other questions.

  9. #82
    To the MSB BAtman! n00bster's Avatar
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    wow!! i can't believe i missed this thread. Subscribed!

  10. #83
    GO 'Cats! bonz's Avatar
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    Quote Originally Posted by 2DIE4 View Post
    Of course just wanted to help and they seem very sweet the T28R Godzilla version :-).
    I like it "The Godzillas". Shall we adopt this guys? (Stu).
    I could give a S#$% what THEY say. I actually have never found THEM.

  11. #84
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    Quote Originally Posted by bonz View Post
    I like it "The Godzillas". Shall we adopt this guys? (Stu).

    I like it, but on the other hand, it sounds a bit like its referring to T6 or large T4 turbos and, for obvious reasons, sounds a bit Nissanish. I'm a big Tom Clancy fan so I like names like F-117s (Stealth fighter; stealth turbos), Sidewinders, AMRAAM, F-22s or Raptors (implies speed and quickness to me, not just speed), Hellfire, Pave Lows (very stealthy and very low flyin helos) and you get the picture....

    Ken.
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  12. #85
    SupraForums Member moridinx's Avatar
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    Wow, just stumbled across this thread, but looks interesting! Hopefully this will make it to production sooner than later :P

  13. #86
    SAP R/3 Guru 2DIE4's Avatar
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    Iam with you Ken it should be something with stealth .... i just throw in Godzilla since i happen to have a Nissan R34GTR as well :-) maybe they should be called "Zilla KLR's" instead hehe .

    Quote Originally Posted by KenHenderson View Post
    I like it, but on the other hand, it sounds a bit like its referring to T6 or large T4 turbos and, for obvious reasons, sounds a bit Nissanish. I'm a big Tom Clancy fan so I like names like F-117s (Stealth fighter; stealth turbos), Sidewinders, AMRAAM, F-22s or Raptors (implies speed and quickness to me, not just speed), Hellfire, Pave Lows (very stealthy and very low flyin helos) and you get the picture....

    Ken.

  14. #87
    GO 'Cats! bonz's Avatar
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    I'm in for Hellfire or Pave low, I like em both. Stealth may get mixed up with Dodge...gasp.
    Last edited by bonz; 07-28-2007 at 07:34 AM. Reason: spelling

  15. #88
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    So does anyone one know if the gt28r's need a custom downpipe or if any 3"dp will work and if it will need a custom intake or will any supra intake work?

  16. #89
    SupraForums Member moridinx's Avatar
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    I vote hellfire or raptors. someone should start a poll

  17. #90
    SupraForums Member RRocket's Avatar
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    Why not call 'em "Hammer" as in drop the hammer in honor of hammerhead who got the 1st set made?

  18. #91
    GO 'Cats! bonz's Avatar
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    I like that even better.

  19. #92
    SAP R/3 Guru 2DIE4's Avatar
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    Brilliant, Hammerheads has a nice ring to it
    Quote Originally Posted by RRocket View Post
    Why not call 'em "Hammer" as in drop the hammer in honor of hammerhead who got the 1st set made?

  20. #93
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    I don't really care what you call them, so long as they work and I can get a set.
    Last edited by Guido; 11-07-2007 at 04:20 PM.

  21. #94
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    Quote Originally Posted by bonz View Post
    I like that even better.

    Brian,

    This is your thread, my friend, and Stu and Aaron are responsible for all this so, whatever you and Stu decide will, by definition, be alright with me.

    Ken.

  22. #95
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    Not sure if I have missed it but will these be going into production if there is enough interest?

  23. #96
    SupraForums Member aaron300's Avatar
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    LOL I really don't mind what people call them as long as people don't end up calling ME names in the end. I'm in the aerospace industry so my preference would be for raptor. My initial design is a 60 trim t3 compressor hybrid. The set that Stu/BNR came up with is a full GT28 CHRA (maybe ct-gt28) on ct housings, so 'hammer' is probably appropriate. The compressor side is the same, and the GT28 turbine and shaft are bigger. Of course what I come up with next... only time will tell. I don't know that you will ever see this stuff become a truly 'production' product. The demand is not great enough to provide a big enough payback on the investment.
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  24. #97
    Somebody's Watching Me! ovey1's Avatar
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  25. #98
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    Quote Originally Posted by aaron300 View Post
    I don't know that you will ever see this stuff become a truly 'production' product. The demand is not great enough to provide a big enough payback on the investment.
    I guess thats fair enough though....you guys have inspired me to start something like this now in the UK

  26. #99
    I love sequentials!
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    How about ct28's ? That's what I call mine, ct28's


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  27. #100
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    Quote Originally Posted by 2DIE4 View Post
    Brilliant, Hammerheads has a nice ring to it
    Not bad I dont mind!

    As far as dimentions... I will have to post up some pics for you guys to gawk at... From compressor Outlet-Outlet is shorter by 1" or so.... The silicone coupler along the Valve cover has to be shortened by 1" The one connecting both turbos on the boosted side.

    The (2) silicone connecters connecting Turbo to Turbo for Inlet need to be shortened too.. I Didnt Shorten the Rear Coupler, So that way I could keep the Intake inline with the factory intake... If you shorten the Rear Coupler. It will move the intake back further, And we are already pressed for space with the strut tower.

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