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hypergear

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Everything posted by hypergear

  1. hypergear
    Best to upgrade induction and exhaust first then play with the EBC as the end result will vary. I'm posting up an promotion on our new ATR43SS-2 internally gated bolton turbochargers so more people can enjoy our latest development. The Retail price on this item is currently $1450, you can have own them now for $999 including braided oil feeding line. The Special offer is for 20 units only. That is currently the best performing RB25det bolton turbocharger. Product details and Dyno results are: http://www.hypergearturbos.com/index.php?route=product/product&path=72&product_id=81
  2. hypergear
    Been told by customer its pretty responsive. It cost $850 to high flow.
  3. hypergear
    During the VNT CBB development the shaft speed of the SS2 Alpha have maxed out the gauge of 180,000RPMs around 5000RPMs, so by the end of the run of 7200RPMs it would be over 200,000RPMs. The 12,000RPMs bearings don't work, they could be easily obtained, those were the first ones I've tried and Very nosy. Apart from balancing, and shaft speed there are many other critical areas to be considered. It took me close to a year to workout all aspects and having it working reliably.
  4. hypergear
    what sort of turbo is it?
  5. hypergear
    This is a newer high flow profile available for Rb20det owners. It is very specifically aimed at response. The profile configuration works out very close to a 2871 in 52T. Maximum power wise would be expected around the 230rwkws mark depending on supporting mods and amount of boost given.
  6. hypergear
    I got HX35 laying around for preferably some one had a 3076 or similar to try it. It was a repair job for a school bus and the customer didn't came back. They can make the power, how ever there are many options out today which are capable of the same amount of HP with better response and drive ability.
  7. hypergear
    If you are using a Mac solenoid for boost control. I'm not if this EBC allow different gain settings at different RPMS which some ECU support. You can can use perhaps 50% gain down low and 100% gain after 5000. But either way the SS2 should have a slight creeping behavior working with a EBC, I think the drop could be related to insufficient supply of air or discharge of hot air inside the exhaust. See if boost level changes after 5000RPMs without air box lid and mesh filter first, then try a hollow cat ( I can lend u one if you need ).
  8. hypergear
    Those are for Diesel school buses. They are not effective for high performance petrol in today's standard.
  9. hypergear
    The new SS2 is some thing that is slightly bigger then a GTX3071, but not I'm not sure if its performance wise is similar to a GTX3076. as the turbine end is larger then a Garrett item. Compare to GTX3071, SS2's compressor is 1.5mm larger on the inducer and 3mms larger on exducer. The turbine end is 4mms larger on the inducer and 3mms larger on the exducer. The radius on the compressor is slightly conservative for low RPM efficiency, while turbine blade radius is more aggressive for better discharge. It has very effectively lowed the back pressure in side a turbine housing specially working internally gated. Accepted more timing, much better boost control, and made more power on lower boost level. They can be built in either Bush bearing, Steel ball bearing, and Cage-less Silicon-nitrate ball bearings. Do drop in an email when time is for upgrading, and see what we can build.
  10. hypergear
    My evaluation car gets different turbochargers fitted every week. Its just a matter of touching up the fuel and ign map, usually take about an hour to do.
  11. hypergear
    Just personal experiences fixing up BB cores and making my own. One thing with this bearing system is the balls were pressed in and the raceway in the cartridge is grinded and polished. So the balls are always harder then the cartridge. 2ndly with lubrication, even the bearings are oiled, at high speed balls actually throw oil away from it self, Its more like it gets oiled at low shaft speed while not much at high speed it when needed most. Under high boost with extended period of WOT, back pressure forces turbine wheel sitting against the bearing collar at high shaft speed, the raceway wears. Which bush bearing turbos has none of those problems. Let me know if you wish to try, and I'm certain the latest SS2 will out perform any of the GTX3071 and 3076 mentioned.
  12. hypergear
    My apologies, Just noticed its a R34, mine wasn't. Might be a different or a older chip, or tuner didn't try hard enough to get it working.
  13. hypergear
    Its has a factory air box lid down and a complience cat. With those bits upgraded it will he able to hold higher boost up top for more power. From memory nistune run out of tables after reaching 17psi on mine. Trent said the same thing, and i was upgraded to adaptronic.
  14. hypergear
    Since you are in Melbourne. its probably best if you can drive it in for a quick check up. Its better to see the car while trouble shooting. Please call 0413457185 before dropping by.
  15. hypergear
    I've paid in total of almost $10G in fines for EPA so far so its best stay internal gated for street car.
  16. hypergear
    Because now all of the turbos that we build are specifically focused to work with factory setups as a bolton upgrade, specially in the recent changes of compressor blade radius as well as the turbine blade radius that encourages better compressor efficiency as well as discharging capacity. So they has good response, hold boost better, makes more power and a much happier engine. Performance can be similar to some of the expansive setups without all those hassles. SS2 result shown above has 38mm internal gate as standard. Running external gate would drop EGT significantly, and that results in better upper rev power and torque band. Just depending where its going to be driven.
  17. hypergear
    posting up an results. This is out of a R33 skyline with a .82 PU high flow that I've done about 4 years ago. It made 355rwkws @22psi internally gated on E85 with 1600cc injectors, ECU, FMIC, coil packs and 3inch turbo back exhaust.
  18. hypergear
    Video footages for the ATR28SS2 on SR20det from earlier
  19. hypergear
    And any one into Nissan patrol 4.2L Diesels ? High flowed stock turbo made 121awkws on 15psi maxing out stock fuel pump. Stock turbocharger maxed at 81awkws.
  20. hypergear
    The discharge temp using this comp housing is lower. Helps top end by a little.
  21. hypergear
    Well SR20det in .63 is equivalent to an RB on something like a .84. That R34 has much better hot side setup then yours and on E85. Like mentioned earlier, Tuning P98 with a tinny rear housing will need to have detonation in mind, in which you will have to back off timing from the optimum ignition angle to avoid pinning. You have less of this issue tuning E85 fuel, that allows you to fire spark closer or at the crank angle for optimum engine output. Or you can just run E85, which should boost up 40KWs in power getting you over the 300rwkws mark on the same boost level. Edit: Add in one more piece of information: Garrett GT30's turbine is in 60in / 55ex. The tip height and exducer area determines the total capacity of discharging, so technically this turbine does not have much better capacity to a GT30 turbine.
  22. hypergear
    ^^ In this case the OP6 high flow made more power on less boobst Like mentioned earlier, higher octane fuel will allow you to run timing that is closer to the optimum degree. Or you can also enlarge the exhaust side turbine wheel that has similar effect to an larger rear housing. This case a larger housing would be the cheaper way to get more power.
  23. hypergear
    I can see boost started to tapper as soon as peek was reached. This can happen because the compressor is inefficient to feed the engine with that much of Air at given RPMs. Or the exhaust manifold pressure is too high that blows the gate open. And when it has an external gate it means the EMP is very high. Taken example given by Hy_RPM then it will be more likely that the turbine end is maxed. There isn't a real lot of point of trying to hold the gate shut in this situations as it will makes the engine wants to pin. So you end up running higher boost on less timing and not alot of gain. Of course you can cure it with E85 or Q16 that marks your Ign timing closer to its peek torque output. Run a smaller gate will only increase EGT, in situations like this is very wrong. Some thing like this is a perfectly balanced setup between induction and discharge. It is running an 38mm internal gate also: SR is 4cyc engine with 8.5 compression. So it won't be copping with back pressure issues as what RB engines gets, generally makes a lot more power in a smaller turbine housing. So a .82 turbine will definitely make some changes to boost curve, and lot more power.
  24. hypergear
    By the looks of it, Its just bolted onto stock exhaust manifold and externally gated off rear housing. So the question is how much factory exhaust manifold can flow, and my evaluation result says 280rwkws on P98 unless excessive amount of boost. The compressor design with huge impeller radius and plus antisurge housing makes it very un-efficient unless huge amount of boost given. In which you can not run those boost levels with a 65mm / 56mm turbine in a .63 rear. My advise is get a proper exhaust manifold, a .82 turbine housing, a 50mm external gate. Then run heaps of boost.
  25. hypergear
    Posting an result. This is from a SS2 Based High flow that we did for a Auto M35 stagea not too long ago. It made 275rwkws on 20psi with Pump 98 fuel. Note: The WOT was engaged in a slow manner on run below, for the reliability of factory Auto.
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