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hypergear

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Everything posted by hypergear

  1. hypergear
    Result of another R35GTR build. Similar specs as above except this is running our bigger size SS-2 profile option. Made similar power except this car runs on Pump 98 fuel. Build specs are: Nissan R35 GTR 2015 model stock engine and box. ETS street intercooler boost logi intercooler piping with tial bov, boost logi turbo inlet pipe ID 1050 injector DW 300C fuel pump Decatted oem down pipe and y pipe& HKS exaust 3inch intake pipe Upgraded actautors HyperGear SS-2 high flow option Final result is 639whp / 477wkws hubs, Ron 93 / P98 fuel at 20psi.
  2. hypergear
    Sharing results from recent Liberty Walk R35 GTR, since they are still considered as somesort of a V36 Skyline. We do them turbos too. This are high flowed SS-1 models with ball bearing conversion done. Car have managed to pull 485awkws @ 20Psi so far pushing limitations of factory built engine. The build list for R35 GTR enthusiasts as follow : HyperGear high flowed stock turbos in SS1 (G25-660 specs) Custom titanium intake pipes. Vspec performance titanium front pipes. Vspec performance 4" titanium exhaust. Upgrade fuel pumps. 1200cc injectors. Ignition coilpacks Hks intake plenum. Hks intercooler piping. Greddy intercooler. Greddy bovs. Top-secret coolant reservoir. Emtron ecu. Straight E85. Built gear box.
  3. hypergear
    The overboost could be more of a cause. Broken turbines usually ends up in the cat, time to engine rebuild. Blown stock turbos can be high flowed with bigger and modern wheels for greater power goals.
  4. hypergear
    Not yet. The current 45mm Gen 4 gate is already a tight fit. I don't think the EWG 40mm is going to squeeze in that spacing.
  5. hypergear
    I’m doing some side developments on SR20det S13 engines, its one my hobby cars used it to compare flow capacity of some smaller size wheels. SR20det is one of another JDM legendary engines I'm sure there are plenty of SR enthusiasts on this forum, I will share results some common turbo configurations here. a quick run down of what the car is: Wide body 180sx Type X with black top engine (blue). It has: Stock bottom end Haltech 1500 ECU 5-0 motorsports trigger kit Kelford SR20DET Beehive Spring with Titanium Retainers Kelford Cams SR20DET S13 188-B 268/272 Cams G25-660 Turbocharger in T2 .64 rear housing internally gated ARP Head studs MLS head gasket 1000CC ID injectors Walbro 450L Fuel pump Front mount cooler kit JJR’s 3 inches turbo back exhaust (its too short for the 180sx it had to be extended) Pump 98 fuel Hub Dyno tune So far made 270rwkws at 22psi full boost by 4500RPM. Engine is very knock limited hence a pretty bad looking top end. From previous experiences it seems like SR20dets are happier with bigger size turbine, some thing like a GT30 would make way better top end, but on same time response is lost. It won't be a problem with S15 VCT engines. I'll be testing alternative turbine housing, turbine wheel and possibly dump pipe options for extra flow to resolve the problem and of course E85 would resolve all the issues.
  6. hypergear
    Updating results from our ATR43SS-1 turbo in T3 .63, OEM bolt dump pattern. Not a big number but pretty sweet for a stock Rb20det. Car's managed to pull 220rwkws at 20psi, perfect boost control internally gated with EBC and excellent mid top end power band as they usually skydive after 5.5K. Usual bolt on supporting mods and inlet plenum and factory location exhaust manifold. Pump 98 fuel was used (Ron 93).
  7. hypergear
    Might also needs a stronger actuator with the right preloading. With older 2019 built bush G3 units, BB upgrade or 21U housing down size makes a pretty decent gain in response as well.
  8. hypergear
    Car would be very knock limited on pump 98 fuel, this is also why lots of old school turbos has such a massive turbine end to drive a small compressor. Overall a decent result for pump fuel,
  9. hypergear
    Greater amount of energy is required to turn larger wheels up to speed, there for laggier. However bigger wheels are capable of flowing greater amount of air through both housings, let the engine burn more fuel and makes more power that way.
  10. hypergear
    We've been working on all sort of different types of turbos with majority of work load shifting towards Euros in the last few years. The Skylines are more of a hobbie then a daily, at least its like that in Australia. I will update photos from some of our latest RB jobs. Whats recent is G30 turbine housing externally gated plumb back kit using T3 .83 geninue housing. It can be made to suit G35, G40 and G42 units. External gate optional.
  11. hypergear
    Copies. Their results I'm not going to say idential but very close to geninue
  12. hypergear
    Sorry I don't agree, at least for the G30-770/900, The G30-660 isn't far off to a 700 response wise and doesn't make as much power. Referring to my last few dyno runs from Rb30det. Power and response of the two G series tested were no where near to the current model ATR43SS-3. But I respect everyone’s preferences. Free data for everyone who’s interested to know the performance ceiling of those two G series turbochargers. All three turbos run to a point that no more power could be made / no more boost could be held. Everything else apart from the turbo stay unchanged.
  13. hypergear
    The SS-2 made 317rwkws V 21U G3 high flowed made 282rwkws at a point that no more power could be made on a built RB25det Neo motor on P98 / Ron 93 fuel. 21U high flow is about 400RPM more responsive making 20psi by 3600RPM, while SS2 made 20psi by 3800RPM. High flowed Rb25det turbo drives very similar to stock turbo. My recommendation is still ATR43SS-2 in T3 .71 rear housing with ball bearing core, as it has stronger power delivery with higher power capacity.
  14. hypergear
    ATR43SS-1 is better suited for a RB20det engine. SS-2 is suited for a Rb25det engine. Externally gated kit is highly recommended as it makes more power on less boost pressure with higher power ceiling. I've attached an example of our high flowed OP6 turbocharger running both internal and external gate. Turbo is boosted to a point that no more power could be made. Car's an R33 with built Rb25det engine.
  15. hypergear
    To get the most out of the car, you will need to external gate it. Plumb back just doesn't work. And even externally gated, by adding an additional cutout pipe to the dump pipe made a huge difference at this power level. Remember the my test car had a 3 inches cutout pipe in the dump working with a 3.5 inches exhaust and two 40mm external gates. At a point when you are be able to rise the inlet boost pressure that makes no power gain is usually due to an restriction on the hot side of the turbo setup, that also causes boost pressure to fall up top as greater volume of flow is required maintain boost pressure per crank revolution increases. Stock cams shaft was getting pretty maxed towards 450rwkws, it needed alot more boost to gain additional KW at that point. I would put steps 1 cams in if I was doing it all over again. Dyno makers are annoying, all clamed making the most accurate dynos in the world, and none of them agrees on power/torque/speed formulation, that causes issues on end users. If roller dyno was used, you probably see a lower figure due to traction and load. If it was on a Dyno dynamic dyno, you would likely be seeing a much lower figure, that is due to formulation of the dyno software.
  16. hypergear
    Correct
  17. hypergear
    SS3 has very similar to a SS2. It needs to be externally gated for boost control. Performance wise about 60kws more in comparison.
  18. hypergear
    Yes correct. Link is at: https://hypergearturbos.com/product/atr43ssiwg/ SS2 Profile, T3 .71 Turbine housing, Ball bearing upgrade, and oil line kit. Thats pretty much it.
  19. hypergear
    Assume the application is for internal gate. Far as internal gate concern SS-2 makes around 300rwkws on P98 fuel in either .63 or .71 turbine housing. Response are about the same between the two.
  20. hypergear
    Hi I found G25 turbine is too small for a Rb25det motor. I recommend our ATR43SS-2 in T3 .71 turbine, its very similar to a G30-660 with better response. Its supplied as a brand new turbo internally wastgated.
  21. hypergear
    Updating results. Using ATR45SS-0 model VS UHF57-900. Those two are very different turbos, different wheels sets with different wheel hub profiles but yet with almost identical result. I’m intrigued with both turbos performance. ATR45SS-0 was a 61mm turbo first developed in May 2020, UHF57-900 was a 62mm turbo developed in March 2024 as a powered up alternative of a G30-900. On paper ATR45SS-0 maxed at 563rwkws, while UHF57-900 maxed at 568rwkws. ATR45SS was slightly more responsive with slightly better power band through the mid range. Road driving ability, ATR45SS-0 had better throttle response, felt more robust under throttle, as it wakes up earlier. I think G series wheel hub design made it to have higher inertia under light throttle. Doing bit more prototype work in the next few weeks, will update result when its back on dyno again. ATR45SS0 Blue, UHF57-900 Red Chequered tuner's Dynapack hub dyno, E85 fuel. Mod list is in video below video_20240604_114214.mp4
  22. hypergear
    The housing it self made minimum differences, while the exhaust manifold made a difference. 6 Boost T3 divided will do fine. ATR43SS3ProR model in T3 .82 rear (TS optional) from March 25th will be more then capable of 450whp with excellent response.
  23. hypergear
    T51R mod is an Antisurge slot. With exception that it has few extra legs on the base of it which makes a sound, and it needed to be inserted into the comp housing.
  24. hypergear
    Yep, I was supprised. Its all about flow rather then housing size. Doing G35-900 Vs ATR45SS-1 Next. 62mm V 61mm.
  25. hypergear
    Further result update. This is from our ATR43SS3 model in T3 .63 rear housing, run against None Geninue G30-770 and 900 spec turbochargers in T3. 82 turbine housing. Those turbos are ideal for RB25det motors, Since I've got a bullet proof RB30det, its been used as test bed instead. All three turbos run to a point that no more boost could be held and no more power could be made. Same test car and exact vehich setup as been used testing all three turbos:
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