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hypergear

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Everything posted by hypergear

  1. hypergear
    I also got a print of John reco's R33, thats the first time I had a proper look at his result. It is running our standard 21U high flow on E85 fuel, and I'm amazed of how responsive it is.
  2. hypergear
    Cooler change: P98 fuel. Blue lines are with blitz cooler, The red/gold lines are from new cooler. Nothing has been changed apart from the cooler. Its hitting 200rwkws @ 4000RPM as well. Pretty good to drive. I will do a pressure test and see what comes up.
  3. hypergear
    goto: www.learntotune.com purchase their basics and road tuning course plus watch through all the online tuning videos. You will have a pretty good idea of how things works before hands on experiences.
  4. hypergear
    The ATR43G4 SAT has been trailed on two cars, and from previous reading it is holding 27psi perfect flat before the cooler, its not a case of a compressor losing efficiency at high shaft speed that case boost tapering. Getting that volume of air into the engine is the problem. Now, the 600x300x100mm cooler it now fitted and I have picked up 3psi pushing it from 292rwkws to 313rwkws, got better response and allow one degree of extra timing. But there is still a 5psi drop. The cooler it self is also been used on my GTR, that shown no boost drop across the core. The problem will be either in all the bents of the pipings or if there is a leak or issue on the inlet manifold of the car. Over 2G has been spent in to investigation, and this has never been experienced before on any of my other cars. None further turbocharger evaluations could be conducted, so I'm not stopping till its sorted. I'll weld vacuum nipples at different bents of the cooler piping and monitor drops from individual points.
  5. hypergear
    For this particular size my current 12 blade design worked better then 11 blade. You will need to supply me with a set of housings.
  6. hypergear
    I've been invited to input my recommendations by Po. After owning and doing developments on SRs: My S14 currently runs a set of BC Step 2 264/12 cams, they make better power on less boost compare to Step 1 256, and not as laggy as the 272s. For internally gated I personally use and recommend our ATR28SS-2 This turbocharger. It maxed at 307rwkws on 24psi, on Pump 98 fuel, 20psi @ 4100RPM. Excellent street performance turbo that bolts on factory manifold, dump, water, and oil lines (S14 benjo fittings). For external I recommend our SL20.5 in 8cm turbine. Just had a recent customer made 357rwkws on E85 fuel at 24psi. Red top SR with no VCT full boost by 4400RPM, Which would be around 4000RPM with VCT engaged. 400rwkws+ on SR is a long shot, For the best response for engine capacity I recommend our ATR45SAT turbocharger. For high boost, you will need valve springs. The whole packing on mine including: BC S2 cams JE pistons +.5 over sized pistons Tomei Multi layer steel HG Eagle Rods BC valve springs (recommend Tomei on this item, BC springs are too hard for VCT, you will be replacing it regularly). Rocket arm stoppers Genuine Bearings, water pumps, gaskets, bits n pieces. Parts and labor came to 6.5G. Which isn't too bad. Built by Forced motorworks. It is in a test car that gets threshed very hard on dyno on weekly bases. It has been trouble free.
  7. hypergear
    Anti surge comp cover reduces surge issues, which you are unlikely to see that on a RB20det motor. It also reduces power to boost ratio in some cases. I don't machine surge slots in unless there is a surging problem.
  8. hypergear
    Few RB20det owners buys a high flowed Rb25det / Neo turbo and replaces their blown Rb20 standard turbos with it. Those high flows are not made for RB20det motors. It will be very laggy. And not so relevant. We usually run a different combination of wheels for RB20det standard turbocharger high flows, those are Rb20det "high flowed" turbocharger results. and For power and response, its not bad for a high flow using stock housings. The current ATR43SS1 per the black back ground read is made for a Rb20det, it makes reaches full boost about 4000RPM, and makes 227rwkws @ 17psi. That is turbo is engineered for a Rb20det engine, that bolt on to your factory manifold, dump pipe, and all lines. My Rb20det dyno readings are limited, Based on SR20det, the response of a SS15 is slightly laggier to a GT2860Rs but more responsive then GT2871R. This turbo is also efficient enough to peek 281rwkws on pump fuel at 24psi internally gated. Taking accounts if installation, response, power to boost ratio, and ability of performance gain on future modifications. This is a my recommendation.
  9. hypergear
    I will be dynoing the ATR43G4-SAT model on Thursday. Thats is a very good turbo if you are looking for a high powered bolton unit. One thing is you might have to run about 23psi, which is no problem for a Neo motor.
  10. hypergear
    I can build a SS15 with SS2 turbine wheel and machine your factory GTR turbo housings to suit. Rear wheel is in 11 blades.
  11. hypergear
    That is the perfect name for that sort of a turbine system. Sure PM for details. Dummy up the bolton version this weekend. I'm had some new actuator brackets locally made, that will mount the actuators above the comp housing instead of on side. That will not only keep the actuation angle straight, but will also making life much easier on installation:
  12. hypergear
    The new turbo is a little bit different. It is using the steam peddle turbine system that we've been working on since the start of the year. In comparison of earlier models, the approach method of engine's dynamic discharge is more direct. This turns the negative effects of the restrictive factory engineered log manifolds with bottle necks effect positive. Since the swirl is reduced, hot air moves in and out of the turbine side at a faster rate, this makes the use of over sized compressor wheel less likely to chock an engine, this also makes turbo response less sensitive to compressor change as earlier results indicated. This turbo can provide performance of a larger turbo while retain response of a smaller turbo, it does not necessarily relay on externally gated system to make power, and the most important of all, it is simple and cost effective to build.
  13. hypergear
    Actually, on the late run the IT stayed at about 45 degrees which wasn't too bad. But the pressure drop was still there. I think they've packed way too much fins inside their coolers. But if you are stuck with this cooler and prefer not to have it changed, all you have to do is drill a 1inch whole on both sides of the cooler pippings and bridge them together. That way it should carry 30% of extra flow, except its not been cooled of course. The ATR45 AKA ATR43G4 SAT turbocharger is now released on our site for both Rb25det and Rb26det single turbo setups. They are $900 each to build. I'm working on the internal gate version of that currently. Reaching 350rwkws on pump as a bolt on turbo will be awsome
  14. hypergear
    I have 64mm comp billet wheels, Those are from ATR28SS15. It peeked 281rwkws, and averaging about 275rwkws pump 98 fuel, on my SR. On dyno it is slightly more responsive then a 2871 while made more power. Orange is ATR28SS15 in .64 rear, Green is GT2871 in .64 rear. Both are S14s with BC Step 2 cams. on pump 98 fuel. Slight boost control issue on that particular day: With boost controller fixed:
  15. hypergear
    Probably, doesn't make that much power. The last test it made 292rwkws on 18psi after cooler but showning holding perfect flat on 25psi precooler, That should make towards 350rwkws on pump once a proper cooler is installed.
  16. hypergear
    Developing the SAT model at moment. they should make some where close to 370rwkws on E85 as a bolton turbo, but do make 20psi around 4000RPM.
  17. hypergear
    Need more Power ?
  18. hypergear
    You can use your existing compressor wheel and run with our ATR28SS-2 turbine wheels in your current turbine housings. That will drop back pressure, cooler EGT, and makes more torque.
  19. hypergear
    Yes that is possible. Best supply the raw casting for this application, as other wise it needs to be sleeved before machining.
  20. hypergear
    Another prototype, this one is made for internally gated XR6 BA and FGs. Unlike the GTX3582, this turbocharger is also fitted with a much larger exhaust wheel working with a big 40mm internal gate. The approximated HP out put on this turbocharger is around the 430rwkws internally gated on pump 98 fuel. Releasing few evaluation units at special prices, PM if any one is interested to trail.
  21. hypergear
    R34 GTT RB25DET NEO unopened engine. - Adaptronic ECU - 1000CC ID injectors - Factory cams and cam gears. - HyperGear ATR45SAT-SRFC (Special edition made to work with restrictive return flow coolers) - Havoc Fabrication 3 inches turbo back exhaust - Walbro 470L/H Fuel pump - 4 inches induction pipe - Split fire coil packs - Internal gated RB25 bolt on. - P98 fuel 292rwkws @ 19psi "after the cooler" Hit 190rwkws @ 4000RPM, Drives very nicely, perhaps another 50kws gain after cooler change.
  22. hypergear
    Based on the cooler behavior from earlier test runs. I've made another special application turbo: ATR45-SRFC This one is made for the minimum amount of boost drop, making some some where towards the 300rwkws mark on pump fuel. It is a bolton turbo just like the ATR43SS/G series. So this will be your recommended turbo if you you've got this type of intercooler installed chasing similar power levels. Final result of 292rwkws @ 19psi after cooler. Internally gated, P98 fuel.
  23. hypergear
    Its actually an T2x turbine housing. T2x .64 is the only housing that provides good drive ability working with Rb20det engines. So we made a drawing and worked out a method that modifies a Standard T2x .64 turbine housing into a Nissan Rb Bolton turbine housing with a massive internal gate. That enables us making any RB bolton turbos using any T2x based wheels for better response. The SS1PU for Rb25det follows the same pattern.
  24. hypergear
    Means the engine is un-opened. Standard cams, standard cam gears, standard pistons, rods, and every thing else.
  25. hypergear
    It will out perform a 2530 in terms of power with similar response.
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