hypergear
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Everything posted by hypergear
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Thanks for the info. It appears the steel bearings are much quiter in high boost. It is also much cheaper to stock, I will be looking into it a bit more. This is a pretty interesting turbocharger that I worked on recently. An IHI RH5 twin scroll, twin internal gated. actually has gate in individual pulses. It was very dead when it got here. Now high flowed into a SS1. twin plus VNT turbine is still work in progress, will do further trails once complete before further looking into building some crazy high flows using stock housings. -
After seen Roy mentioning about the TD06H I went through all TD06H dyno readings on Trent's dyno and did comparison against the SL2 turbine. TD06H turbine appeared to be laggier without making any more power. You can try our billet SS2 comped SL2s that is a step up from the standard 20Gs, or I think a standard highflowed turbo would make more power. depending on where the external gate is attached. won't make good results if it is welded on turbine housing, locating it to exhaust manifold would prove other wise. Cheap return flow cooler do have heatsoaking issue and takes much longer to heat sink compare to a good branded cooler.
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lol. yes, I have one that has been remaped by dr drift for a S1 R33 to for an OEM R34 turbocharger suit stock injectors and afm. you can have it for $200.
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You can buy those from BCB bearings. they comes in a pack of 20 for $8. They called E clips, size is 6mm.
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Swapped steel bearings back to ceramic rollers in the SS2. Its made very noticeable difference in down low throttle response, and I'm aware lot of turbochargers used in rally cars are ceramic bearinged for out of corner speed. How ever colleges and people I know in the trade choice to support steel bearings, more or less due to the durability of the ceramic surface under heavy load. The majority of turbochargers that we've repaired in the past are steel bearinged also, probably due to the quantity distributed, I have yet to receive a ceramic bearinged turbocharger for overhaul. Any of you guys experienced ceramic roller bearing turbo failures? if so how long have it lasted at what boost. Cheers.
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That model has been further developed into two additional models, they are the billet SS1 and SS1.5. Results are in page 340
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I prefer not to hijack this thread, But I do have some results with the .86 rear that I would like to show, my reply is in my high flow thread. http://www.skylinesa...ost__p__6753492
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For the SS1, It was too small for a Rb25det, I only recommend it for Rb20/SR20 det engines and they works well. I did built a .86 version of it and it appeared that compressor went out of puff around 5000RPMs resulting a sharp dip in the power band maxing out similar power level to the .64 52T and 56T 76mm wheels were also trailed, the EGT shot through the roof. It was a long project but the .86 version did ended up working and refined. the development and testing blog is in this thread if any one like to read, the final version is called the SS1PU.
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This should be very close to what a 2535 would preform on a Rb25det (my turbine wheel is one trim larger). Its bit small for the Rb25det motor but good for a Rb20det. 279rwkws = E85, 243rwkws = P98
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Oppz thought this is a coil pack when I saw yellow jackets. yes I can trail ignition moduels as well. Its for a S1 R33
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I will be interested to help you out, test them fully and post results. But bear in mind I did have red jackets which lasted 5 dyno pulls before they stuffed. So I hope this is a split fire equivalent rather then different colour same sht. I will be happy to send them back to you after trailing, but not interested of paying for them.
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Its actually very fast, the power delivery is so gradual theres hardly any wheel spin. I'm getting some mickey thompson drag tyres and hitting the strip soon.I think this one can get into the 11sec mark
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10cm turbine. I originally wanted 400rwkws out of this within usual rev range. So it is on the large end. I'm building one more in 66mm, which should drop it back to around 380rwkws mark before 7000RPMs while gain 200RPMs of response. Alternatively have a look at the new roller bearing G3 and SS2 see if that is a better turbo for what you need.
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Since this is about TDxx related thread so I will post all TDxx related results here including the turbochargers that we've built. The ATRSL25.5 (HG re-engineered T67), just maxed out at 399rwkws on mine with stock cams. Tried every thing to get that extra 1kws to crack 400 and it just won't do it. Still the highest on Trent's library for stock headed Rb25det. Looks laggy but it is very fast on the road. How ever for a street car the ATR43SS2 and ATRSL20.5 is a better performer.
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Rb25 Turbo Upgrade, All Dyno Results
hypergear replied to Nacho Vidal's topic in Engines & Forced Induction
Same spec as above ^^^^^ Results from Ball bearing G3 with updated comp profile: E85 high mounted externally gated: Maxing out at 365rwkws I've also done one more run with the The ATRSL25.5G. Little bit pissed as I'm missing 1KWs reaching 400rwkws. Maxed out at 399.1rwkws. Need bigger cams for the full potential of this turbo. Still, this is the highest power ever archived on stock cam from Trent's dyno library. -
I've also done one more run with the The ATRSL25.5G. Little bit pissed as I'm missing 1KWs reaching 400rwkws. Maxed out at 399.1rwkws. Need bigger cams for the full potential of this turbo. Still, this is the highest power ever archived on stock cam from Trent's dyno library.
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Results from Ball bearing G3 with updated comp profile: E85 high mounted externally gated: Maxing out at 365rwkws VS the older G3:
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Ok I will use same profile that I've done for ssxricho, it will have very similar response to stock while produce more power and torque with a very wide power band. Dyno reading and reference is at: http://www.skylinesaustralia.com/forums/topic/261613-hypergear-hiflow-service-continued/page__view__findpost__p__6352727
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Largest Frame Turbo On Stock Manifold- R33 Gts-t
hypergear replied to Yeedogga's topic in Engines & Forced Induction
Other thing comes to mind is factory manifold restrictions. So fitting a massive turbocharger on it isn't going to deliver its full potential. Better of with some thing useful and responsive. -
no worries. So do you want as much power as possible out of it or preferably stock response?
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Well. while engine's running, oil washes the bearings and shaft all times which takes the heat away. So the bearings are not much hotter then the actual engine oil. The only reason bush bearings are made out of brass or browns and some in aluminium is because it doesn't stick or rust together with the steel shaft and bearing housing. None of the BB or bush turbos trailed on my car has been water cooled, Both me and Trent thrash the crap out of them on high boost as a part of testing, and I have not seen one fail. Garrett BB must be water cooled, but not all BB require water cooling, it depends on the bearings how the setup of the chra system.
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Its the profile in the housing. will still be using original cast G3 comp wheel. So the modification can be carried out on any G3s easily (or freely). The billet wheel was from a SS3 I made a roller version of that as well.
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For the G2.5/PU high flow I can only mod it into roller bearings but this comp profile is only suitable for G3. The new G3 has a different comp housing profile. made to accelerate the discharging velocity, I can definitely feel the differences on road. The effects of it on top end power band is unsure so will hit Trents for one more dyno run.
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^^^^^ Updates on the G3 profile. I've done a trail run with the G3 today using compressor assembly above with roller bearing cartridge I have to say it is amazing. the response is at least 300RPMs more advanced with heaps better throttle response. Any one with a current G3 in Melbourne is more then welcome for a test drive. Will be hitting the dyno next week for an comparative run against original G3. Once done I will be happy to swap it with a current G3 customer at no cost.
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Yes when they are assembled brand new the bearings are dry. Once oil goes in it will be fine. This is some modifications done to a G3 compressor housings that is made to accelerate the discharge velocity. Will do some trail on that soon as long with roller bearing assembly. Photo of SS2 High flowed into M35'S VQ25 turbocharger with 38mm internal wastegate.
