hypergear
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Everything posted by hypergear
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yes I have made couple of turbine wheels that goes into the T28's bearing housings. This is mine personal CA18det turbocharger out of my Sil180 few years ago. I've made this after been defected to pass EPA with (it worked). lol It has a small 52 76mm comp wheel with a massive 65mm turbine. -
Also depending on the compression ratio of the motor its going to fit. For a modern 10.5 : 1 motor, a slightly larger turbine end is helpful on stopping it from pining on higher boost level. Like a 1.5L engine on that sort of compression ratio should be pretty responsive with a .64 turbine end with a 68mm compressor if the goal is about 24psi.
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Could be induction sound？Just make sure it has plenty of clean oil supply and none restrictive oil feeding line, it should be fine. Make sure it has 3inch free flow induction and exhaust before going to the dyno. Preload actuator as you go if more boost is required.
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Probably the 64mm billet SS1 in a CA T25 turbine housing should be some thing nice for doing that.
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Yes the atr28g4 is a of a .64 ended t25 turbine housing and that makes 300rwkws on a ca18det. Just abit laggy.
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I think its not a bad result for a auto considering its usually 20kws behind a manual box. What does a locked convert do? I'm thinking of working out my Kia's auto.
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It became harder to gain kws after 390rwkws. Well just need more boost. You don't need cams lol. I think I will be running towards 25~30psi for that sort of power on stock cams. I'll be getting a set of pon cams for some thing like this.
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They are the ATR43SS4 models, They are rarely built for a Skyline, but I've done a few for Forx XR6 customers, They are a mild high flow for the BAs. One customer reported 398rwkws With auto on 98 but I haven't seen the sheet yet. I'm building one with the VNT turbine, hopefully I can get 450rwkws with stock cams and E85 while making full boost before 4000RPMs.
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Good to know the BB core with the new compressor setup is making a difference. It shouldn't be stepping back in power on more boost, might want to go over again making sure engine side is correctly assembled.
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I got 330rwkws on 24psi at Status with the older version, So there isn't that much of variances between those dynos. Jay-Jod: Was the video taken with a Gopro camera?
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This is a normal G3 with .82 FNT turbine. I haven't sold any VNT units yet. Its a pretty good result .
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Another customer's result from the latest ATR43G3 high mounted (ebay manifold), 38mm externally gated on a R33 Rb25det running 327rwkws @ 21psi on pump 98 fuel. This sheet doesn't have boost reading, been told its making full boost around 3800rpms. RPM scale = (SPEED / 28) * 1000
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The new one has inverted nozzle arrangement, they are no longer fighting against exhaust flow. It will reduce the required actuation strength to minimum. This technology can be integrated to any turbine housings. I was thinking about doing few for GTRs. That way theycan run two big twins, making huge power responsively.
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Honestly none of that can match VNT models in terms of response and I can run a +2mm comp wheel to match the peek power easily. Specially when the car has cams and cam gears enhancing outcome. I will post up results from the SS3 VNT once Trent gets back. By understanding how both bearing setup works, I believe the bush bearing setup is more reliable, specially mine has been redeveloped. And I haven't had issues using them.
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If Money is not too much of a issue (still works out cheaper then the fp unit) I would highly recommend the VNT SS3 unit for some thing in this range. Just waiting for Trent to get back and I will pass on some results from it.
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Video sent in from Toshi (Another Great tuner). This is a Video clip from Laurel with a Rb25det engine that we high flowed its turbocharger few month back.
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If you wish to try it I can certainly build two billet the SL20.5 in 6cm turbine. I'm sure its going to be very laggy. alternatively you can run two SS1PU in .64 rear. They will be more responsive option for that goal.
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I've had a 300zx to play with and any thing large is horribly laggy. Running L2 turbine in 6cm will act like a low comp NA most of the time. I did a lot of work for the Z shop and pretty good with Lindsay. The high flowed manual turbos works out better then the TD04s that he had in both response and power. I can high flow your stock turbo with FNT modification and SS1 billet wheel. That should be plenty for 300rwkws+ with excellent driveability.
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Its just a normal SS2 with bush center. VNT model's power curve will be more linear. I'm building a prototype for it to be internally gated at this stage and confident it will bereliably. The new series of wheels are aimed at lower shaft speed efficiency. Most of my customers use them on stock engines running up to 20psi. So the aim is to produce as much flow's possible based on same shaft speed. Comparing current SS2 results with earlier G3, its made the same amount of power on 20psi then the G3 at 24psi, if discard peek power, the G3 had better power to boost ratio after 20psi. How ever the SS2 had better power to boost ration before 20psi. No point making a turbo producing the same amount of power at higher boost level then some thing else that can do it at lower boost level. I can always make some thing capable of running 30psi, just ask when ordering the turbocharger.
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Little update nothing extraordinary. This is the first dyno result sent in by DvsJez (Great tuner) running our latest SS2 with 74mm compressor on a Auto r33. The turbo is built as a factory replacement unit internally gated. One of the goal in the latest development was aerodynamic efficiency at reasonable shaft speed, which helps with boost control in higher rpm range, and I mentioned earlier that it required very little wastegate duty to stabilize boost. This is running just off a 18psi waste gate pressure (normally holds 14psi on G3 and older version) with usual preload. notice there is no tapering off behavior. its an excellent curve.
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I think its a good boost level. Usually the boost curve starts to spike then drop. with more preload it starts to hold, and if over loaded the boost starts to creep. Thats I usually adjust mine with internal gate.
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Its extremely important remembering to preload the actuator as the tuner's tuning. keep on preloading if are seeing boost tapering off before the desired level. It might be 5mms or could be 15mms, the more you load it the higher up top boost level it will hold, more boost makes more power.
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The Automatic Performance Thread
hypergear replied to WazR32GTSt's topic in Engines & Forced Induction
This is recent and yet interesting result sent in from a customer running a SS2 turbocharger with a R34 GTT Auto. It was used as a bolton replacement internally gated. It has: Blitz front mount return flow cooler 1000 cc injectors 255 pump JJr front pipe Z32 AFM Nistune E85 Stock Auto with a transmission oil cooler made 300rwkws @ 17psi of boost. -
This is recent and yet interesting result sent in from a customer running a SS2 turbocharger with a R34 GTT Auto. It was used as a bolton replacement internally gated. It has: Blitz front mount return flow cooler 1000 cc injectors 255 pump JJr front pipe Z32 AFM Nistune E85 Stock Auto with a transmission oil cooler 300rwkws @ 17psi of boost:
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Still work in progress and there are few minor issues that I have to solve. One of them would been the strength of mechanism required for activation, after making a proper bracket I found a simple actuator doesn't have the strength to do this unless running heaps of boost. On an average skyline with 15~18psi of boost it can never activate. It would've been the reason that most of modern VNT turbochargers has a electric lock motor mechanism for activation. or perhaps alter the direct of the nozzle ring movement to opposite direction which changes the physical notion of having the actuator, instead of relying on the strength of push, it can now rely on the strength of pull. I'm looking into the electric locking motor at moment, how ever preferred to have the turbocharger running without it. There are always ways of engineering that archives the same out come without the complication, I've made few changes to existing prototype, a newer and simpler version is on the way.
