hypergear
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Everything posted by hypergear
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Hypergears Atr43 G4 On Rb25det. My Result
hypergear replied to kwickr33's topic in Engines & Forced Induction
I did some comparison on the dynosheet page. It appears that RB25det with cams has better response then the people who doesn't. Today's tune is not bad, but its still got abit of miss up the top not sure if the stock coil packs are getting old. But yea external gate and cams would make a difference to boost and power curve. -
well force = Pressure x area Means there is greater force transferred to the actuator while its trying to pull the wastegate flapper shut. So at high RPMs back pressure over comes actuator's spring load and force the gate open it self. Once that happens you will have a boost drop. and that is not due to boost controller. How ever on the other hand the turbo will boost unlimitedly if wastegate whole is too small. So best is to run a external gate. Lot better boost control, and steady power to red line. I'm currently working on a project, which allows screamer pipe to plum back into certain area of the turbine housing. So we can have a externally gated turbo that bolton without any modifications to dump pipe or manifold.
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The bigger the hole is. The harder it is to hold boost up the top. Best to not drill it out too much. Most Garrett IW housings had the hole match machined refer to the CHRA at the sort of perfect size.
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In average its 29mms.
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The 3582 spec high flow just turned out to be mega laggy with the KKR housing for some reasons. I managed better response with more power using a generic .82 turbine housing with the same CHRA. So I traded it off with a GT3076 56T .82 with cash adjustments. This will make 300rwkws with far better response. Manifold wise if you are on external gate stock manifold is ok for 300rwkws. With Ebay manifold you have to machine both flanges flat before installation and make sure there aren't any hanging welds stuck on the inside of the manifold. Apart from that they ok to use. Also check your external gate make sure its sealing probably.
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We don't have to pre-load it and leave it at 10psi. We can keep you bracket slotted so you can pre-load your self when needed. But once set it will be the lowest boost amount you can run. Also I meant CAS (Crank angle sensor). If you advance that by 2 degrees it using 98 fuel it will give abit more power, But test it on a dyno just in case engine pins.
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The $960 high flow does not includes any actuators. We normally slot the factory actuator bracket 5mms down wards so you can add a little pre-load on it instead of 7psi, Depends on the pre-load that is on it. we normally sit them to around 10psi. Other customers who bought 1KG, 1.2 KG or high pressure actuators will endup with higher boost readings. after all I would be expecting every one to run abit of boost through them. Fuel pump, cooler, with high flowed turbo should have no issues running on 10psi with stock ECU. You can tab the CAS very slightly advanced on 98 fuel and get 200rwkws using factory map (do it on a dyno).
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New! Rb Nissan Special Garrett Gt3076r Ball Bearing Turbo
hypergear replied to Harey's topic in Engines & Forced Induction
I did some trail with the "big can actuator" on a GT35 turbine based sleeve bearing turbo in .82 bolton turbine housing with 29mm waste gate port, it held 18psi to red line and made 298rwkws on a stock RB25det. But same actuator could not hold anything more then 17psi flat to redline on a OP6 based high flowed R34 turbo. So it depends on the CHRA and housing configuration. How ever You will get better boost curve with external gate. Other alternative is to build a housing with a external gate port in and out pre the dump pipe area. So you can externally gate a Bolton turbo without making any screamer pipes. -
ATR43G3 .82 turbine. You get 263rwkws on 15psi of boost.
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With RB25det you should get about 260~270rwkws on about 18psi with external gate. The .63 turbines is very good for street response but not very good for big power and torque. Shipping to WA is $35.
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Yes that'd be 1250 + 150 for the ATR43G3 with .82 housing and the high pressure actuator. + 10% GST and $80 oil feeding line. which is $1600 AUD. Same profile In .63 turbine can get full boost around 3500RPM. But you need a external gate to hold it steady. Boost curve in .63 turbine: http://www.digi-hardware.com/images/dynosh...3boost15psi.jpg
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The ATR43G3 is a 3076 56T equivalent turbo. in .82 turbine full boost at 4300RPM. Good for about 280rwkw with highpressure actautor internally gated. We can install a GT3076BB 56T CHRA for $450 additional. The .82 turbine housing is a custom made housing in T3x print, with a 6 bolt OEM RB25's dump pattern.
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This is from a Friend's 95 R33 running a ATR45 600HP turbo in .50 comp and .82 turbine internally gated using a high pressure actuator. fully stock RB25det engine, 550cc injectors, cooler, Nistune chiped Z32 ECU , and 3inch turbo back exhaust. Tuned at 399rwHP @ 18psi. It hits 18psi at 4800RPM. Not the most responsive turbo, But it certainly can do lot more then 300rwkws.
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We can build a 2871 equivalent CHRA in a customized T3x .64 turbine housing with 6 bolt dump. Should make similar sort of power and response.
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Just direct vacuum straight into the actuator with no boost controller. You should see a drop in boost curve. GT3076 is a Original Garrett Item. We use them in our turbo builts, high flows and overhauls depends on customers request. Most of our turbochargers are built in sleeve bearing setup which is some thing that is equivalent to produces similar end result. Garrett does not have IW housings that made to suit RB25det OEM engine setup. Ours is a custom made housing which is in the same Air ratio but with OEM RB25det Bolton pattern.
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Thats why its called 1KG actuator. Once boost controller removed it should stay around 10psi. You can also play with the actuator's pre-load to alter boost settings.
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check intake pipe (make sure it does not shut under boost). pre-load few rounds on the actuator or go for the high pressure actuator.
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standard will run about 9 psi without boost controller. Once boost controller is adapted it can hold a max of 15psi to red line. High pressure actuators are ok to hold 21psi.
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We can find a blown one off wrackers then high flow that for $100 more. The normal turn around time is 2~3 working days.
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It appears to be a 3071 or 76. Depends on its bearing setup or turbine wheel.
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You will find few fords with GT3582Rs twisted shafts due to BOV blockage. I've personally repaired few. All cars that came out of factory with a T25 or bigger size turbos are fitted with some sort of release valve. For the ones that didn't are not released for more then 7psi. Just think about, what happens to the boost inside your cooler piping and cooler once the throttle is shut. The turbine shaft is made to drive compressor wheel. not other way round. Surge at 20psi acts as a hammer striking on the comp wheels every time you let go the accelerator. We did some minor fabrications to the compressor collars and comp side half shaft act against this problem. So far I've not seen any of our turbos having this type of issue. How ever running a BOV for high boost application is a essential for any turbochargers that is out there.
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You need to run a BOV and reduce surge pressure. Not good for the turbo at all. Any way, the standard actuator is ok about 15psi. You will need the high pressure actuator for any thing higher. But should be able to get close to 270rwkws on 15psi with supporting mods and a good tune.
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He will make 260rwkws+ on the OP6 with the actuator supplied. The PU high flows are capable of doing lot more then 270rwkws.
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- Standard High Flow R34 470hp, exterior is completely standard - PU High Flow R33/34 500hp, this includes .82 turbine housing and high pressure actuator. Standard Comp housing - ATR43G3: 520HP in .63 Rear, aftermarket turbo, standard actuator. (high pressure actuator optional) - ATR43G4: 600HP in .84 rear, aftermarket turbo, standard actuator. (high pressure actuator optional) - GT3076 spec turbo in .82 turbine housing, exterior of compressor is standard, but aftermarket exhaust housing. standard actuator. (high pressure actuator optional) All bearing housings has been modified to suit RB25's water lines, Oil lines for sleeve bearing models is supplied. Oil feeding thread for BB turbos has been modified to suit RB25's oil line. Oil drain adaptor for BB turbos is supplied.
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Yes its a custom made housing with flange to adapt to stock manifold and dump. The inside of it we can machine it to suit most of GT3x wheels. Compressor housings we normally use .60 size with 3inch inlet and 2 inch round outlet. you are going to need a 90 degrees rubber hose and a 3inch straight hose if you are going to connect them to your stock intake and cooler pipes. We can modify the GT30's bearing housings to suit stock water and oil lines. and supply the oil drain adaptor. So you don't need to get any aftermarket feeding lines Price wise for the Garrett GT3076 56T with .82 custom bolton turbine housing, including modifications to bearing housing and high pressure actuator I can do for $2000 including GST delivered, Won't be able to do it any cheaper.
