hypergear
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Everything posted by hypergear
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the SS3 is made for external gating. for internally gated and 300rwkws+ bolton, The atr45SAT is a better turbo. Alternatively for 260~300rwkws region, you can use our ATR43SS2 for better response. -
SS2 is more responsive while both of them makes the same top end. Torque wise should be very similar.
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Yes can be done. I have done a evaluation few years ago, the SL2 turbine wheel is made for external gating. It didn't work as well as the SS2 or the OP6 high flow in terms of boost control and peek power.
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It is best sourcing waste gate pressure after throttle body, that gets rid of the variations of cooler kit.
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Water fitting on the ATR4xx turbochargers are in M18x1.5 same as OEM. To get full power from the ATR45SAT internally gated version. It needs to be either in a 4 inches exhaust or a 3 inches pipe with 2.5 inches tee off factory front pipe. Exhaust on and exhaust dropped makes a noticeable difference in power.
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ATR45SAT comes with braided oil feeding line and uses OEM oil drain. Including the manifold spacer this turbocharger is $1350 inc GST internally gated. The water lines you can use Earles kits for around $130 from Pirtek. Or you can use push on hoses and fittings, which comes to around $40.
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Best work as a twin, can use two ATR43SS2s, similar to Chequrered tuning's 650rwkws setup. If it has to go Single ATR46 is fine working with two 45mm gates.
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That is where owning the right car makes a difference. Understanding the relations of how all parts working together when all components are available. One problem with M35 OEM turbo is the size of turbine housing is small for its engine size, that limits the ability to discharge. Working with an highly efficient compressor wheel, there is no boost control. instead boost is "controlled" through the limitation of exhaust, intake and intercooler. We don't have a big turbine housing to high flow, dropping exhaust gas pressure becomes critical, the scenario of actuator over pre-loading or spring enhanced method doesn't apply, waste gate must be open to full extend at desired boost level.
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I've had three turbo changes up to date. In the particular area of boost control: When there are less back pressure in the turbine housing then there are less force applying to open the gate. The larger "GT35" turbine wheel referred to, have caused a drop in exhaust gas pressure, more inlet manifold pressure is required to force the gate open, there for higher boost level. Difference between a spring hooked actuator and an stiff actuator is, the spring's extension load is not linear, It requires a huge amount of energy to pull 10mms then 3mms. While the load of a stiffer actuator is linear and consistent. Fully opened gate gains more power, OEM internal gate assembly is only made to open a limited swing plus the turbine housing is too small, there for added to boost creep. I hope I have explained why my car run no less then 29.5psi when I've made my purchase. Majority of my customers rate M35 those as family wagons, feed them with P98 fuel. I'm making my high flows happy to run mild boost level and correspond to EBC sittings. Auto software is not tune able at moment. its relays on low RPM boost to gain speed, Ball bearing assembly have mad an massive difference in this scenario. There are four more ball bearing configurations to trail on, I need a dyno that shows boost curve, Chihan will be doing E85 tunes after P98 maps. will enclose final results when ready.
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if you are using JJR's piping kit, their pipe diameter is 2.5 inches, so size of the hole is usually cut in 2.75 inches. The PWR cooler is around $1150, size is in 600x300x81mm, you will need to order that through PWR.
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SS2 RV5 shown on photo above is installed. It amazes me of how much of a difference of ball bearings have made on M35, which I could never notice that much on a RB engine. The actuator works pretty well, will be tuned after the new year to share some results.
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Good day, Yes the new actuator opens the waste gate bunk to 90 degrees. Which is included in the $990 option. You will need E85 to get 310rwkws using a R33 high flow on a R34. I'm usually seeing around 245rwkws with the return flow cooler, on E85 it is expected to reach 270rwkws. To use PWR cooler or some thing in a 100mm front mount, you do need to cut under the battery tray.
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With JJR pipe that touches, easiest way is to zip tie the drain pipe to aside of the bracket.
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Its got plenty of clearance using a OEM dump pipe. Or should JJR be making dump pipes following OEM dump pipe angle? But Having said that not all jjr dump pipes touches either. That Xforce dump in my R33 years back was trouble free, and so is Tomei. I will seek alternatives ways to get the IWG assembly shorter.
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They are just JJR's cooler piping with a PWR cooler. I'm using Stock plenum.
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$130 delivered including the bracket. It have made a noticeable difference on my car on the SS1 high flow that just been removed. I would like to see boosting behavior on the dyno before selling. Videos from BoostedR on SS2 Rv4 shown differences between OEM actautor and Stiff Borgwarner actuator: OEM actuator: Borgwarner actuator:
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Have been through few different high flows including OEM turbo on my M35 guinea pig so far. On problem with the M35 high flows is in the OEM wastegate. It is almost as Nissan engineered it to blow open at very low revs. I have installed a 20psi actuator to it using custom actuator bracket and the difference in response between EBC load is very noticeable. New actuator assembly opens at a almost full 90 degrees, It makes a noticeable peek HP to a partially opened wastegate. Getting better transit response, I will be using ball bearing CHRA units, it does not require much oil to run and more then happy working with OEM oil restrictors: Will update results once fully tuned.
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I don't have the machine to do that. There is a workshop not far away that does ceramic coating, I think they charge around $100 a housing. Another result to post. ATR43SS2 externally gated. This is the older version. Usual 3 inches induction and exhaust, FMIC 600x300x75, 1000cc injectors, high mount, 45mm external gate, PFC E85 fue.
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Rb25 Turbo Upgrade, All Dyno Results
hypergear replied to Nacho Vidal's topic in Engines & Forced Induction
Here are two more ATR43SS2 graph sent in, all E85 fuel, R33 Unopened engines. 3inches intake and exhaust, ECU, generic 600x300x75mm cooler, and E85 fuel, Peek power made at 19psi. This is Traditional ATR43SS2: Twicked version, conservative tune, but notice the difference in upper rev torque: -
Result from R33 21U high flowed turbocharger: R34 GTT RB25DET NEO unopened engine. - Power FC - 1000CC ID injectors - Factory cams, cams gears, and all manifolds. - HyperGear R33 GTST 21U OEM High flowed turbocharger - 3 inches turbo back exhaust - Walbro 470L/H Fuel pump - 4 inches induction pipe - Split fire coil packs - 600x300x76mm front mount cooler - Tuned by Trent Hewitson, Chequered Tuning. 312rwkws @ 19psi E85 fuel
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Rb25 Turbo Upgrade, All Dyno Results
hypergear replied to Nacho Vidal's topic in Engines & Forced Induction
R33 GTST RB25DET unopened engine. - Power FC - 1000CC ID injectors - Factory cams, cams gears, and all manifolds. - HyperGear R33 GTST 21U OEM High flowed turbocharger - 3 inches turbo back exhaust - Walbro 470L/H Fuel pump - 4 inches induction pipe - Split fire coil packs - 600x300x76mm front mount cooler - Tuned by Trent Hewitson, Chequered Tuning. 312rwkws @ 19psi E85 fuel -
Results from an Externally gated SS2 from externally gated R33 Rb25det E85 fuel. Note the rise in torque as engine revs out.
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3.5 inches turbo back will work te best. Bell mouth. Or 3 inches with exhaust tee.
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Yes. probably make more power then SS1PU.
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Yea. cost $990, includes large internal gate assembly, high pressure actuator and oil line.
