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hypergear

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Everything posted by hypergear

  1. hypergear
    Its a re-circulation valve. I believe Its there getting rid of compressor surge. Proper BOV is recommended.
  2. hypergear
    For around 260rwkws with same sort responds as your stock turbo. The best option is to find an blown R33 turbocharger and send that in for high flow. Every thing bolts back the way it is and factory looking.
  3. hypergear
    ^^ Great result. Thanks for sharing. Please upload dyno reading when free. Thank you. For SL20.5 it will be making 20psi by 3800RPM, once converted to G4, it will be making full boost around 4600RPM. It depending on how you want the car to drive and what you do on tracks.
  4. hypergear
    Its the combination of the 25G compressor and L2 turbine don't work on Rb25dets due to the level of its its back pressure. On the same time it depends on how much boost you run through them and how hard car's been driven. I have repaired a few, the simplest options would be dropping in an SL20.5 CHRA with comp housing into your existing turbine housing, it will be making the same amount of power with much better responds as your T67. It will cost you $850 to carry it out. Alternatively we can make some thing that suits the 25G compressor wheel by using our 75mm SS-4 turbine wheel. It will be capable of making around 430rwkws E85, It will be laggier. This option cost $850 to carry out also.
  5. hypergear
    GTR-33 Standard unopened engine Brae high mount manifold HyperGear HPVA 50mm external gate 1000cc ID Inejectors Haltech platinum Plug in ECU HyperGear ATR43SS-2.5 Alpha CBB Turbocharger 600x300x68mm intercooler 3inches turbo back exhaust 330awkws @ 20psi Pump 98 fuel.
  6. hypergear
    And for people whom are switching to the ID 1000 injectors. The resister pack made for OEM injectors has to be removed. Big thanks for M35scotty on solving this issue yesterday. I believe he has some technical details to share.
  7. hypergear
    Further testing and evaluation on the SS2.5 Alpha turbocharger, now using an 600x300x68mm tube n fine front mount cooler. I've attached two photos, note the tubing size inside the aftermarket cooler and factory cooler. Aftermarket cooler: Stock cooler: Using the new intercooler, boost tapering issue was resolved to some extend and the same turbocharger managed to pickup more power. Cooling ability however is not as good as standard, under comparison my intake temp rise by 10 degrees. I will be fitting an thicker 600x300x100mm cooler for further evaluations coming week. Turbocharger wise, it is matching factory N1's responds but a lot more power. Pretty good to drive at this stage. ATR43SS2.5 Alpha, externally gated on pump 98 fuel. Peek 330awkws: Vs stock cooler using the same turbo: In conclusion based on test result, the factory GTR intercooler is only good for up to 320rwkws on pump fuel, for upgrade, I would be recommending a good cooler that has a core size of 600x300x100mm. Tuned by Trent Hewitson, Intercooler piping and related fabrication done by Havoc Fabrications.
  8. hypergear
    ATR43 SS-2 Rb25det Stagea. Externally gated from stock exhaust manifold E85 fuel. Final result of 356rwkws @ 22psi on Dyna dynamic dyno:
  9. hypergear
    That is on pump 98 fuel.
  10. hypergear
    adding one more result. This is an bolton version of an ATR43SS-2 on a RB25det with usual supporting mods making 278rwkws @ 17psi on a Dyno dynamic dyno, Sheet is a bit blurry, will have a clear photo updated once received. For now:
  11. hypergear
    T67 ebay version is a 25G on a L2 turbine. 25G compressor is good enough for 430rwkws while the L2 turbine is good for 370rwkws. In combination the maximum I'm seeing was about 370rwkws on 23psi, factory cams. they don't last long at that boost level either. Commonly seen Greddy T67 consists of 25G with TD06H turbine is fine for both longevity and power making, but it does cost responds. In addition, we build some alternatives based on the 10cm L2 turbines that makes the same power as the L2 based 25Gs, that are more responsive, last longer at similar cost. Check out SL20.5 and SLSS2 on Rb25det dyno section.
  12. hypergear
    It came in with stock exhaust. Before tuning with the twin N1s, I've had a JJR's twin 2.5 inches dump / front pipes installed along with a 3 inches turbo back exhaust with all straight through mufflers. Other three singles turbos they all had a brae made 3inches turbo back front pipes. The engine was pretty happy taking timing it did not appear to have symptoms of a block exhaust. Funny I always end up with previously modified cars making crazy power that I've personally put very little work in, trouble shooting issues through modifying a fully stock car is a very different experience, hopefully after every thing is sorted, this thread would contain some useful data for RB26 modifiers.
  13. hypergear
    Stock cooler at moment. all three turbos plus the factory N1 had the same boost tapering behavior on this particular setup.
  14. hypergear
    I've made few plugs and completed and leak test, which plugged the cooler piping that connects to the turbo, the 3.25 inches end that goes to the inlet manifold as well as the bov return. I pumped 20psi through using a compressor and it held pressure fine. It has a full 3inches turbo back exhaust. I can't think of any thing else apart from the cooler. Hopefully the new cooler fixes this problem.
  15. hypergear
    The boost tapering looks like a pressure drop across the core very similar to page 83 . There are no leaks, I will be upgrading to a standard 600x300x75mm cooler as well as getting rid of the factory twin bovs, Hopefully that will make a difference.
  16. hypergear
    Yes it is in 4WD. The front wheels only comes on for few seconds how ever, its a RWD most of times.
  17. hypergear
    Been to the dyno today, It appears to have some sort of flow restriction or a boost leak some where, the new turbo is a 3582 equivalent made exact same amount of power as the smaller SS-2, while the boost tapering issue is unsolved. But either way implanting VNT system on Rb26det engine is very successful. at 4100RPM the differences between engaged and disengaged was 10psi and 60kws. Brown is full engaged, Blue is dis-engaged, light blue was when we did some experiments with VNT trigger that can be discarded. Back to dyno again next week, hopefully with the boost issue fixed.
  18. hypergear
    Great result. Thanks for sharing. Further evaluation and testing, Since the ATR43SS-2 Alpha is too small for the Rb26det engine, I have made an customized SS-4 Alpha turbocharger using a much larger turbine, compressor how ever is slightly smaller then the current retail version. The goal is still 350rwkws on pump fuel with optimum responds. The new turbocharger drives great on road, be interested to see what the dyno says next week. I think I have found the reason for my boost tapering issue, looks like a silicon hose wasn't tightly clamped.
  19. hypergear
    Xkalaba: I haven't had feed backs on those yet. I will update results once its been passed on. Some updates on our ATR28SS15 turbocharger for Sr20det motors. Have been working in this for the past few weeks, this our latest ATR28SS15 with a set pressure of 18psi. I'm very happy with today's result, as the new turbine wheel have made a difference of of 10kws while not penalising on responds, while the internal wastegate assembly have managed to hold 19psi flat and 1.5 psi tapper at 23psi. I no need to run 23psi mid range to hold 20psi top. Final result was 281rwkws @ 21.5psi with 20psi reached by 3800RPM, and 190kws on 4000RPM, on pump 98 fuel. Car is a S14 with black top SR20det using 264/12.05 BC cams. Compare to the older version, notice the improvement in the boost tappering behavior, Note: Pink was today's run: plus improvement in upper rev rang power and torque: 0
  20. hypergear
    Yes have seen few R34's has CAS issues. Blah_blah had same problem. Borrow one of a friend and see if the issue goes away. In general there is a 15kws difference in between the SS-2 and Op6 high flows internally gated. Making power is all about how much air could be forcefeed into the engine, and obviously better free flowing engine systems will archive higher outputs. And been reported by autotech that the return flow have dropped 5psi at 20psi across the core, which my PWR cooler had only 0.5 psi differences. It might be some thing worth checking and looking into. But great result on the SS2 with 17psi. That is on an plumb backed system with stock exhaust manifold. Externally gate this turbo on a good high mount manifold can result an gain of an further 40kws
  21. hypergear
    Dyno tuning today with the SS2-Alpha turbocharger on the GTR-33. 1000cc injectors are installed also. Thing are running 100% the first time. I'm still diagnosing the reason for a major boost tapering behavior up top. Could be if the external gate is not set with the right pressure springs or if the compressor wheel is out of efficiency. Peek power made today was 326rwkws @19psi on pump 98 fuel. Quite responsive and drives great on road. Will install a much larger turbo next week to see if that might be affecting the boost ramping behavior after 6000RPM. Xspurt 1000cc drop in injectors:
  22. hypergear
    And induction pipes will make some differences also. Pretty sure there will be positive gain by replacing stock 2.5 inches rubber to 3 inches metal.
  23. hypergear
    See that cap, once removed its almost as no air box.
  24. hypergear
    Cheaper then sending it back n forward from Taiwan as well.
  25. hypergear
    Funny the L2 reversion wheel is actually too small for the evo. That looked like a reversed TD06H turbine which worked out even better, they must got a well flowed head from factory.
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