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

  1. #126
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    Ok so I am in the process of making my write up install. But I have some pics I uploaded off my camara to share today. My only hold up is the Tuner. Im trying to get him to use a local dyno, because he is having issues with his Dyno. He tells me by friday his will be running... Ill keep ya posted.








    BTW: Future installers... 45 degree oil return flanges will work better than straight ones.

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  3. #127
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    Quote Originally Posted by hammerhead View Post
    Ok so I am in the process of making my write up install. But I have some pics I uploaded off my camara to share today. My only hold up is the Tuner. Im trying to get him to use a local dyno, because he is having issues with his Dyno. He tells me by friday his will be running... Ill keep ya posted.
    Deffo mate, im glued to this thread

  4. #128
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    To those waiting for some results on (I suggest) the "Hagen Hybrids", I should have some decent info fairly soon. Both my Supras went into SP Engineering yesterday, with the red car scheduled to get the Hagen Hybrid upgrade and some other stuff. I would have hoped to have them already installed but, in a classic case of mission creep, typical aftermarket parts delays, with both combining with SPE taking delivery of a 4wd Mustang Dyno to supplement its existing Dynojet (delaying them taking in my cars), here we are.

    I have a bone stock motor and the only changes I will be making that will affect power production are installation of the turbos, replacing my HKS intake with the Blitz SUS and re-tuning my set-up as a result of the new turbos. I feel my dyno results, whatever they may be, should be fairly predictive of guys taking a similar approach. My car has made 415 whp and 422 lb-ft at 19.8 psi, which is on the low end of BPU cars with all the plusses. As a result, I'm guessing most guys with a well-tuned set-up similar to mine should make at least as much power as I will likely make. The guys in the 440-460 whp range with the stock turbos could make a good deal more, all things being equal. If my motor makes a greater than anticipated jump in power as a result of the Hagen Hybrid upgrade, it will probably be the result of my OEM turbos being produced on the "non-ringer" production line when they were originally manufactured. Given the length of my "to do" list, I should have results in about three weeks.

    Ken.
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  6. #129
    ma70-7m=1JZ becauseican's Avatar
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    I didnt see this thread until now, good work Stu !!.

    I made a twin GT28R turbo setup for my 1jz two years ago, I was going to try to make an oem look setup, but it was going to be way to much work at the time, so I made a set of SS tubular mani's and off the shelf Garret GT28R turbos run in parallel. I figured I would post my results her scince they are relavent to this thread. They responded very good on the 1jz, even with only 2.5L displacement, they had a full 18+ psi boost at about 3700-3800 rpm. At 15 psi they made 370 rwhp, and at 19 psi on 94 pump gas 470 whp. I took these up to 22 psi with a 94 pump/C16 mix and made 502 whp and 470 TQ. I couldnt turn up the boost any more because my spark was getting blown out. These start to get out of thier efficiancy at 24-25 psi and I wouldnt take much past this. I think there was about 530-550 whp max with thes turbo's at 25psi. They did surge a bit at part throttle and cruising speed on the highway, which got a little annoying, but they spooled up very fast once you got on it. I personally think that the GT28R is too small for the 2jz and even the 1jz and the gt28RS would be a better match.

    My mods were: stock 1jz, Mines tuned ECU, Greddy E-manage, 720cc injectors, twin 2.5" downpipes, 3" mid pipe and 3.5" exhaust.




  7. #130
    GO 'Cats! bonz's Avatar
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    ^The GT28RS's couldn't be "morphed" enough to make these work and keep sequential. Thanks for the information, nice job...I followed your build up from afar.
    Last edited by bonz; 08-04-2007 at 02:48 PM. Reason: spelling

  8. #131
    GO 'Cats! bonz's Avatar
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    I asked the dyno. section for estimates on how much power this set up will make. See link below.

    https://supraforums.com/forum/showthread.php?t=448133

  9. #132
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    Ok My Hagen Hybrid's are in I"ve finally been able to do some road testing and I love them!!! Right now I"ve just got my SAFC at 0% so I"m running pig rich My AF's are in the 9's and I do fill a tiny bit more lag but that may also be due to my new greddy 3 row install. As soon as my number 2 comes on I'm definitly feeling a lot stroger pull all the way to redline. I'm going to the dyno on Thursday so I'll have some numbers by then.

  10. #133
    Bullseye Dealer mk4umha's Avatar
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    Quote Originally Posted by TURBOYZZ View Post
    Ok My Hagen Hybrid's are in I"ve finally been able to do some road testing and I love them!!! Right now I"ve just got my SAFC at 0% so I"m running pig rich My AF's are in the 9's and I do fill a tiny bit more lag but that may also be due to my new greddy 3 row install. As soon as my number 2 comes on I'm definitly feeling a lot stroger pull all the way to redline. I'm going to the dyno on Thursday so I'll have some numbers by then.
    The turbos you have on right now are from one of the 24 sets that were made?
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  11. #134
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    No, they are the T3 hybrids aka "Stu and Aaron Hybrids".

    The GT28R's are the "Hammerhead Hybrids" upgrade. And we are still waiting on anecdotal and dyno. info. on them.

    Clear as mud? :eek3:
    Last edited by bonz; 08-05-2007 at 10:36 PM.

  12. #135
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    Quote Originally Posted by TURBOYZZ View Post
    Ok My Hagen Hybrid's are in I"ve finally been able to do some road testing and I love them!!! Right now I"ve just got my SAFC at 0% so I"m running pig rich My AF's are in the 9's and I do fill a tiny bit more lag but that may also be due to my new greddy 3 row install. As soon as my number 2 comes on I'm definitly feeling a lot stroger pull all the way to redline. I'm going to the dyno on Thursday so I'll have some numbers by then.


    turboyzz,,,what other mods you have on your car,,,just want to see for comparison sake,,,
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  13. #136
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    FYI, we had a PacNW Supra meet this weekend and I did a 502whp at 21psi. I could of up'd the boost, but since I run daily 20-21psi, I figured I'd dyno at my street tune. This was with 101 unleaded and in 4th gear. We also did 11.8 @ 124 at the drags with a 1.89- 60'. Not impressive for this HP, but neither was the 60'

    Trenton (turboyzz) is running the Aaron T3 Hybrids like what I have now. Next week we should have 3 dynos, his, hammerheads, and ken hendersons.

    Stu

  14. #137
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    I edited my last post to reflect "Stu and Aaron Hybrids". Carry on

  15. #138
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    Quote Originally Posted by TaBooLeH21 View Post
    turboyzz,,,what other mods you have on your car,,,just want to see for comparison sake,,,
    My mod's include BPU+= (Greddy power extreme exhaust, RMM Downpipe, Greddy profec BII Boost Controler, SAFC, VPC, Greddy BCC, Tial BOV, Greddy 3row), Rps lightweight flywheel, and the Newly added Stu & Aaron Hybrid Turbo's W/ wastegate spring mod.
    All the bold items are newly installed along with the hybrid turbo install!!!

    I dyno'd about 3 weeks before my #2 went out with a little SAFC tuning and Dyno'd [email protected] 16.3PSI on 91 pump gas. So We'll see what the new setup can do on Thursday!!!!!
    Last edited by TURBOYZZ; 08-06-2007 at 08:38 AM.

  16. #139
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    Quote Originally Posted by TURBOYZZ View Post
    My mod's include BPU+= (Greddy power extreme exhaust, RMM Downpipe, Greddy profec BII Boost Controler, SAFC, VPC, Greddy BCC, Tial BOV, Greddy 3row), Rps lightweight flywheel, and the Newly added Stu & Aaron Hybrid Turbo's W/ wastegate spring mod.
    All the bold items are newly installed along with the hybrid turbo install!!!

    I dyno'd about 3 weeks before my #2 went out with a little SAFC tuning and Dyno'd [email protected] 16.3PSI on 91 pump gas. So We'll see what the new setup can do on Thursday!!!!!
    Please get uncorrected numbers!

  17. #140
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    Quote Originally Posted by KenHenderson View Post
    I have a bone stock motor and the only changes I will be making that will affect power production are installation of the turbos, replacing my HKS intake with the Blitz SUS and re-tuning my set-up as a result of the new turbos.
    Ken.

    Guys,

    I may have lied here. Circumstances being what they are, it looks like I could come into a great opportunity for some cams. You know, trying to emulate my hero Mr. Hagen. No matter the decision, it won't delay my project. What say ye?

    Ken.

  18. #141
    GO 'Cats! bonz's Avatar
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    Ken,

    I would go with the cams all the way. Which ones are you thinking, 264's?

    Brian

  19. #142
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    Definitely!

    I'm getting cams for my upgraded twins


    Quote Originally Posted by KenHenderson View Post
    Guys,

    I may have lied here. Circumstances being what they are, it looks like I could come into a great opportunity for some cams. You know, trying to emulate my hero Mr. Hagen. No matter the decision, it won't delay my project. What say ye?

    Ken.


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  20. #143
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    Quote Originally Posted by hammerhead View Post
    Ok so I am in the process of making my write up install. But I have some pics I uploaded off my camara to share today. My only hold up is the Tuner. Im trying to get him to use a local dyno, because he is having issues with his Dyno. He tells me by friday his will be running... Ill keep ya posted.




    BTW: Future installers... 45 degree oil return flanges will work better than straight ones.



    hey Hammerhead,,,constructing the water lines looks kinda easy to do,,,what kinda piping and size of piping did you use???

  21. #144
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    Quote Originally Posted by KenHenderson View Post
    Guys,

    I may have lied here. Circumstances being what they are, it looks like I could come into a great opportunity for some cams. You know, trying to emulate my hero Mr. Hagen. No matter the decision, it won't delay my project. What say ye?

    Ken.

    I think you should do the cams, so long as they are 264's. But, maybe 272's would work since these are larger turboes. I think you will see a nice increase in power with whatever cams you choose, though. Are you using the new exhaust manifold as well?

  22. #145
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    Wow, I'm gone for 2 weeks, and I see this thread has blown up. I don't know how I missed it before. Good luck to the pioneers on getting this kit out. VERY NICE!

  23. #146
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    Quote Originally Posted by KenHenderson View Post
    Guys,

    I may have lied here. Circumstances being what they are, it looks like I could come into a great opportunity for some cams. You know, trying to emulate my hero Mr. Hagen. No matter the decision, it won't delay my project. What say ye?

    Ken.
    Hi Ken,
    I think the improvement from the cams will be small relative to the turbos. However, it does eliminate the abaility to compare the turbos back-to-back at the same boost level. I don't think that is a big deal though, and anything you do that frees up the intake side just allows you to take more advantage of the larger flow capacity of the upgraded turbos. If they are too good of a deal to pass up I would definitely add them in.
    Regards,
    Aaron
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  24. #147
    SupraForums Member RRocket's Avatar
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    Quote Originally Posted by KenHenderson View Post
    Guys,

    I may have lied here. Circumstances being what they are, it looks like I could come into a great opportunity for some cams. You know, trying to emulate my hero Mr. Hagen. No matter the decision, it won't delay my project. What say ye?

    Ken.

    I spoke to Greg Caloudas from GSC Motorsports after he said he was making cams. He claims to have a cam grind that works specifically with the stock twins or a very small single turbo. He claimed 25-35RWHP at 18-19 psi. You might want to contact them...
    We affirm that the world’s magnificence has been enriched by a new beauty: the beauty of speed. A racing car whose hood is adorned with great pipes, like serpents of explosive breath - a roaring car that seems to ride on grapeshot....

  25. #148
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    ^any eta on when the GSC cams are coming out?

  26. #149
    GO 'Cats! bonz's Avatar
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    Quote Originally Posted by Shabib67 View Post
    ^any eta on when the GSC cams are coming out?
    They already make it, I believe. Just give them a ring.

    Also I asked him about the "Hammerhead upgrade" (Hybrid GT28R turbos) and he recommended the S1 cams. Please find link below to the cams and pricing, one of their web pages (often reached) doesn't have the pricing yet.

    http://www.power-division.com/home.php?cat=267
    I could give a S#$% what THEY say. I actually have never found THEM.

  27. #150
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    Bonz,

    Those cams look to be 269/269, compared to the HKS 264/264's that a lot of people have. I wonder how much, if any, difference there would be between the two.

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