hypergear
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Everything posted by hypergear
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Some updates. Since I'm waiting for my next tune I've spent some time with the new SR20det. The GT3071 in .64 came out. and now replaced with a much more responsively ATR28SS1 turbocharger: I'm not a very big fan with the .64 rear housings as it turn to chocks the SR in upper revs. So for this Sr20det I've was fitted with a .86 FNT turbine housing, and for any one whom haven't read earlier post the ATR28SS1 has a 63mm compressor wheel. few other thing I've noticed that the SR20s are much harder to work with, replacing the GT3071 turbocharger took me almost 6 hours to complete in which replacing a Rb25det turbocharger would take me less then 2 hours. Even the Tar weight between a S14 and R33 is only 50KGs how ever this S14's chassis felt much lighter then the R33 (might because half of it is fiberglass) . Not only in driving around in corners but also by pushing them around in the workshop. Any way, a dead fuel pump, a bad cluster and a wrongly connected electric fan explained the random cut out pretty well. Means it run lean and dry most of times, with the electric fan blowing at a wrong direction this car would have been overheated and shutting down once so often, the malfunction cluster would inform the driver that nothing should be worried about. A touch of the Gizmmo ebc indicate this engine has been running 24psi most of its life after been fitted into this chassis since the end of 2011. In which I really appreciate the honesty and generosity of the seller, experienced none of the problems that I've mentioned perhaps, and decided to leave this car at his parent's garage collecting dust. How ever the cosmetic side of things do looking pretty good. And every single bolt on it has been lock-tight, which would be my misery pulling them apart. On the positive side it is much better to drive now. boost comes in nice and early, torque pulls all the way to red. With some luck I might be seeing 230rwkws mark on Pump 98 fuel this Friday. -
Since results from the 21U high flows has been reviewed. I'm using the same chra combination for a OP6 rear. If I can get it to perform towards 350rwkws mark E85 then it means this turbocharger will be capable of making 300rwkws based on pump 98 fuel. That would be job well done for a high flow. This particular one is in roller bearing, same to whats been used in side the SS Alpha series. I'm planing to put some Ks on it during Xmas, testing the longevity of those bearings used against heat and high back pressure usually find in high flowing applications. Still running the SS4 Alpha tune, It comes in reasonably early. Unfortunately the bit of screamer pipe I've made for my external gate is too long causing the gate to rub on the heater hoses. That part will be remade, photos will be updated once event occurs.
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Limitations Of Stock Fuel Rail Rb25Det Neo?
hypergear replied to camoo's topic in Engines & Forced Induction
I'm doing 490rwkws on stock rails. No need for upgrade at 350rwkws. -
Since I'm going back to stock exhaust manifold I've made some alterations. The briefing: About that debate of where to attached an external gate to, my opinion was to T piece two side logs from factory exhaust manifold and externally gate. I want the flexibility of running either internal or external gate. Well I originally thought it would be an simple easy job which turned out to be very complicated and involving. Probably not something for average Johns to complete in his garage. Ok here is a first attempt of what I've done to mine: After measuring what might be going where. I've drilled two 30mm wholes on top of both collectors: I've used 30mm dia Steam pipes and bridged them together: A Vband O ring is made and welded onto the end T piece. Note I've cut the 90 degrees pipe at center of elbow which gives me an average dia of 43mm. The gate is positioned with screamer welded, This is our 50mm HPVA gate. The one used on my brae high mount manifold was the first one ever made couple of years ago. Screamer pipe bolted on: So for an externally gated setup this is completed. About the bit that what if I only wish to run an internal gate: A blank was made, allowing the external gate can be removed. Here it is. It took about two days to complete, booked in for tuning next week and hopefully not too much behind what it was with Brae high mount. By the way SSx Alpha turbochargers internally gated bolton version is been made. Evaluations will be conducted with results to follow.
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Lol didnt see that coming. The jjr is ok. Need to die-grind their dump flange abit. From memory it didnt match up with factory gasket.
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I do welcome discussions about SR20dets as I'm learning about it my self. Here is the dyno reading form the S14 I've just bought, with a GT3071 turbocharger appears to be in a .64 T2x turbine: The response on paper is bit better then I anticipated. Its made 22psi by 4300RPMs. Very little power for the amount of boost given. Its lake of down low torque, drives like a NA most of time. The sheet does how that which makes 120kws on 4000RPMs. Same power with 300RPMs better in response would be nice. Other funny thing about this S14 is it appears that they've hidden all the electrical wiring. There are no wiring or fuse boxes any where inside this engine bay. Electrical work would a nightmare. I'm modifying my factory Rb25det exhaust manifold at moment for external gating, how ever it will be externally gated on two different spots of which I think been the highest pressure points. Will upload photos once its done and be interested to see how much difference in power I might be losing from the Brae high mount with a factory bolton version of SS4 Alpha turbocharger.
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Your exhaust is fine and is making good power. No need to change it. Unless the new one glows in dark.
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If I can get VCT enabled that should make a huge amount of difference. Its currently on cam gears. need to get this fuel problem fixed first. So will come to that abit later. any one knows SR inside out in Melbourne whom's interested to do some work?
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Its horribly laggy. I have a dyno reading from Trent before went to see that car. It makes full boost at 4600RPMs. enough revs for me to pump 490rwkws out of the R33. Since its been sitting in garage for a long time I think its got some fuel pump issues cutting off randomly on boost . Its going to be taken back to Forced Motorworx for a full check up before pumping through 24psi.
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The key to success is buy and work with quality. It took a while, I've managed to pickup a worked S14.5 with engine fully built by Forced motor works and tuned by Chequered Tuning that is very properly done with lots of goodies. Gizzmo boost controller (tuned for 21psi running on 19) Autometer wide band AFM Boost gauge 7000km rebuilt engine with 260rwkws (built by forced motorworx) BC 260 cams Drift Exhaust manifold (low mount) RAS (rocker arm stoppers) CP pistons BC rods New turbo (Garrett 30-71) 700cc Nismo injectors Nistune chip (tuned by chequred tuning) 260rwkws (with dyno sheet) Custom air box PWR radiator and intercooler (intercooler is inside engine bay so no chassis cutting) Custom aluminum radiator overflow Cusco front strut brace HKS coil overs all round Greddy oil sump Spit fire coil packs New varex exhaust system 100cell race cat Z32 Air Flow Meter In which will it be used in developing T2x based turbochargers for SR20det motors. With VCT been cancelled. The GT3071R turbocharger in a .64 rear housing is horribly laggy for this SR20det. After driving it 63kms back, I have to admit: RBs are Awesome. Lets see if I can manage to same power with heaps better response.
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The Nissan IWG assembly can be unbolted. Can use a Vband assembly as above or my personal preference bolting up a flange plate with a 3inch pipe welded into the flange. like below: http://www.hypergearturbos.com/images/atr45rear.jpg
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To convert the SS2 to external all it needs is an flange I can supply one for $40 delivered. Haha yes SS6 Alpha, maybe when I get serious with XR6 turbos. Looking to pickup a S14 this weekend and doing some SR stuff.
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Rb25 Turbo Upgrade, All Dyno Results
hypergear replied to Nacho Vidal's topic in Engines & Forced Induction
ATR43SS4BB Alpha Prototype B turbocharger 93 model R33 GTST Forgied CP pistons, valve springs Stock Cams 1200cc injectors 600x300x75mm Front mounted cool Brae high mount exhaust manifold HPVA 50mm external gate plumbed back. Xforce 3inch Cat back exhaust 100 Cell Cat Profect B electric boost controller 4inch intake pipe Adaptronic Plugin Power 435rwkws @ 25psi , E85 Fuel -
^^ Yes the ATR46 is some thing for that application. Stock cams are back. Big thanks to: boostn0199 whom have donated a stock exhaust cam while mine broke. So factory cams are back in and working sweet. Today's dyno run was trailing the newer version of ATR43SS4 Alpha turbocharger, not as huge as the previous one which I would like to call that the ATR43SS-5. I sort of like the power while it made based on the ATR45 (3540 equivalent) how ever couldn't get much drive ability out of it due to the lag. So this one is made to mach the HP as the ATR45 how ever with much better response, down low torque and on road drive ability. So The final figure was 435rwkws @ 25.5psi and peeked 709Mn of torque. This is not at the maximum capability of this turbocharger how ever probably is for my current con-rods. Now compare to the ATR45 which I've dynoed Feb this year that made astonishing 431rwkws during the time: This is much better to drive on road. very strong and wide power band with crazy power up top. Very happy with today's result.
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Well still wheel spinning. It should be reaching around the 320rwkws if it can sit on the dyno. Was Toshi surprised?
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Well if your target HP range is around the 260rwkws mark with mild boost level while retaining factory driving ability then the factory high flowed turbocharger is perfect for this application. We now offer an exchange service, Which you don't need to send us your turbocharger upfront. Means we will send you a high flowed turbocharger for $950 including braided oil feeding line. After installation send us your blown factory turbocharger for a $100 cash back.
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I don't think it matters If you will always be running fixed boost level. Ie. 18psi . because the Timing and fuel distribution table is running based on scale of RPM to PSI. So it will always be running on those cells of the timing / Fuel table. How ever if different boost level is used then the data in reference to the active cell might not be accurate, starting from low moving to high is more of inputting cell data in those areas, for it to work accordingly regardless of what ever boost is used to the highest boost level. So having said all those if the minimum boost level on the turbocharger is set to 16psi and maximum is 20psi then realistically it will only need the data responding to within those boost changes.
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Other part that became a limitation factor is with the boost tapering with internal wastegate setup. Which there isn't much could be done apart from having a very free flow induction (inc cooler) and exhaust system. So I will be doing very precise measurements in terms of wastegating, the boost level will be physically set through the turbine housing to hold a more specific range and nothing less.
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Nisma youtubed a 9.9sec run in a R33 Chassis, Rb25det 900rwhp (671rwkws) was in their description. There were no additional details for their build.
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The highest out put RB25det motor I've seen is 900HP from Nisma performance center. I'm currently doing 490rwkws I don't think the rest of the hardware can take it any further. A list of your mods would be helpful.
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True, how ever it is still playing the power / response trading game. As the down low area of the power curve is now shifted to mid top. SS2 Alpha is a very responsive turbocharger, if a standard SS2 is used then I won't be expecting 20psi till 4100rpms. Tren't computer is some times unstable as it crashes. It crashed after we printed my last SS2 alpha run and lost the dyno plot, So we can only compare paper back at this stage. High flow R34 turbocharger would bolt in straight. It will still need a tinny bit of a twick on the water lines, but not as much as whats on the SS1PU.
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It had more boost in those areas on today's run.
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Did some evaluation and testing today based on the differences those Tomei 264 / 9mm cams. In which Tomei should have done before considering selling those to the market. The difference is. Well, 3Kws in power and 350RPMS in lag. By saying lag means Laggier with Tomei. The Test turbo was a SS2 Alpha with VNT turbine. My original result was: Same turbo, Tomei 264 / 9 Cams: \ ^^^ Notice the difference in response from stock cams. In conclusion the lose in response is 350rpms, which is greater then the gain using VNT turbine system, resulted in a laggier then usual 386rwkws. and I'm unsure of what those cams are good for, been secretly promoting them to few selected retailers, perhaps tomei haven't figured it out them selves. A T04Z or a School bus turbo perhaps. Those cams will be shortly removed and auctioned off on ebay. I'm rather disappointed.
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Well I can swap you with a current high flowed R33 turbocharger and physically set the wastegate to hold 20psi without any boost drops. If that don't make power you might want to have a look into the supporting mods you've got. Since you are in Brisbane, I recommend going to see DVSJEZ. PM through if interested of doing so.
