Jump to content
SAU Community

Recommended Posts

photo1.JPG

$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:

Stalled up vs normal is not a very good test. My log data previously is much better to go off. I found my injectors to be leaking air also so hopefully will be able to improve response further. Difference is best described as now I have some boost available from 2500-3500 at part throttle which makes normal driving nicer. The throttle controller set to SP5 is about right for pedal feel and drop down to keep it from laboring in 5th.

Interesting to see how the Rev5 goes. I haven't been able to get more than 17psi in 1st gear. Video'd the turbo today and the gate doesn't open at all.

post-49288-14503000383967_thumb.jpg

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.

5 revisions...

Trial and error isn't the best way to design an M35 turbo. Too damn hard to fit, especially to a stock car. Good to see you learning something along the way, although an apology about bagging my stock actuator spring mod wouldn't go astray.

Who is tuning it? Would be good to have more tuners interested in working with the EMU, but they might have a steep learning curve.

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.

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.

My 2c

For normal linear springs, force = spring rate x displacement (that is, the amount of stretch), Now since you effectively have two springs operating in parallel in the external spring setup, the force will be the sum of both of the spring rate x displacement calculations. This will typically be non-linear, but non-linearity could be beneficial in some cases. The choice of preload and rate on the external spring can be used to tune the system's response. Since you've changed a fundamental (lower back pressure) you also need to change the actuator setup. In this case it sounds like you need less force, so you would use a lower rate spring and/or less preload.

On any turbo setup whenever a fundamental property of the system is changed (eg back pressure, gate size etc) you should start from the assumption that an actuator tweak is going to be required, external spring or not, then only leave the actuator setup as is if its shown to still work with the new setup.

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.

  • Like 2
  • 3 weeks later...

This will be the final update on the M35 Stagea OEM turbocharger high flows. The Ball bearing RV5 have made a peek of 291awkws @ 22psi on E85 fuel, that is also happy to hold 21psi as minimum base pressure. For any more power that is boost controllable this car needs a much larger exhaust housing or external gate.

Dyno shown 27psi mid range and 22psi of where peek power is made. The mid range boost was pumped using an EBC, to increase mid range torque. Blue line is with converter unlocked and red is with convert locked.

Far as drive ability concern, it has excellent throttle response working with OEM auto in D model, and pulls hard in WTO.

Car has:
Emanage Ultimate ECU
HyperGear Turbochargers M35RV5 High flowed BB turbocharger
18psi actuator assembly

Front mount cooler kit
1000cc injectors
470L/H Walbro pump
Shift kit
Greedy EBC
3 inches turbo back exhaust
3 inches induction pipe with AFM and Pod filter.
Tuned at ETUNER Engine Management Solutions
All Mechanical work done by Kaze Motor Service

photo3.JPG

carondyno.jpg

KM/H Scaled Run:

291awkws.jpg

RPM Scaled Run:

RPM291awkw.jpg

Additional updates. This is our M35RV-1 high flow running duel ceramic ball bearing cartridges. This turbocharger is built for maximum response, happy to run OEM boost levels on OEM ECU, and matching factory drive ability with bit more power. It will be topping out towards 240awkws region using an high pressure actuator.

front.JPG

rear.JPG

So far dynosheet below shown 200awkws @ 13psi with fuel, ecu, cooler and exhaust mods. factory actuator not holding boost.

m35g1200awkw.jpg

Ps: For the best possible throttle response and off boost driving ability working with OEM auto, and low oil flow requirements. All of our M35 high flows will be running thrust less duel ceramic ball bearing cartridges.

  • Like 2

what you got there bud?

Its a holset turbo and a tail 44mm wastegate,Not sure if i linked the album correctly can u see it? looks like its going to be a while till i can put it all in, noticed a knock in my engine last week sounds like rod knock fml

The 6258 is more suited to a 2ltr or smaller. I have a 6758 on my 2ltr Wrx and you wouldn't want anymore response. We have a 6758 .8A/R on a c34 Neo Stagea making 20psi by 2500rpm.

Edited by BoostdR
  • Like 1

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now



  • Similar Content

  • Latest Posts

    • I had 3 counts over the last couple of weeks once where i got stranded at a jdm paint yard booking in some work. 2nd time was moving the car into the drive way for the inspection and the 3rd was during the inspection for the co2 leak test. Fix: 1st, car off for a hour and half disconnected battery 10mins 4th try car started 2nd, 5th try started 3rd, countless time starting disconnected battery dude was under the hood listening to the starting sequence fuel pump ect.   
    • This. As for your options - I suggest remote mounting the Nissan sensor further away on a length of steel tube. That tube to have a loop in it to handle vibration, etc etc. You will need to either put a tee and a bleed fitting near the sensor, or crack the fitting at the sensor to bleed it full of oil when you first set it up, otherwise you won't get the line filled. But this is a small problem. Just needs enough access to get it done.
    • The time is always correct. Only the date is wrong. It currently thinks it is January 19. Tomorrow it will say it is January 20. The date and time are ( should be ! ) retrieved from the GPS navigation system.
    • Buy yourself a set of easy outs. See if they will get a good bite in and unthread it.   Very very lucky the whole sender didn't let go while on the track and cost you a motor!
    • Well GTSBoy, prepare yourself further. I did a track day with 1/2 a day prep on Friday, inpromptu. The good news is that I got home, and didn't drive the car into a wall. Everything seemed mostly okay. The car was even a little faster than it was last time. I also got to get some good datalog data too. I also noticed a tiny bit of knock which was (luckily?) recorded. All I know is the knock sensors got recalibrated.... and are notorious for false knock. So I don't know if they are too sensitive, not sensitive enough... or some other third option. But I reduced timing anyway. It wasn't every pull through the session either. Think along the lines of -1 degree of timing for say, three instances while at the top of 4th in a 20 minute all-hot-lap session. Unfortunately at the end of session 2... I noticed a little oil. I borrowed some jack stands and a jack and took a look under there, but as is often the case, messing around with it kinda half cleaned it up, it was not conclusive where it was coming from. I decided to give it another go and see how it was. The amount of oil was maybe one/two small drops. I did another 20 minute session and car went well, and I was just starting to get into it and not be terrified of driving on track. I pulled over and checked in the pits and saw this: This is where I called it, packed up and went home as I live ~20 min from the track with a VERY VERY CLOSE EYE on Oil Pressure on the way home. The volume wasn't much but you never know. I checked it today when I had my own space/tools/time to find out what was going on, wanted to clean it up, run the car and see if any of the fittings from around the oil filter were causing it. I have like.. 5 fittings there, so I suspected one was (hopefully?) the culprit. It became immediately apparent as soon as I looked around more closely. 795d266d-a034-4b8c-89c9-d83860f5d00a.mp4       This is the R34 GTT oil sender connected via an adapter to an oil cooler block I have installed which runs AN lines to my cooler (and back). There's also an oil temp sensor on top.  Just after that video, I attempted to unthread the sensor to see if it's loose/worn and it disintegrated in my hand. So yes. I am glad I noticed that oil because it would appear that complete and utter catastrophic engine failure was about 1 second of engine runtime away. I did try to drill the fitting out, and only succeeded in drilling the middle hole much larger and now there's a... smooth hole in there with what looks like a damn sleeve still incredibly tight in there. Not really sure how to proceed from here. My options: 1) Find someone who can remove the stuck fitting, and use a steel adapter so it won't fatigue? (Female BSPT for the R34 sender to 1/8NPT male - HARD to find). IF it isn't possible to remove - Buy a new block ($320) and have someone tap a new 1/8NPT in the top of it ($????) and hope the steel adapter works better. 2) Buy a new block and give up on the OEM pressure sender for the dash entirely, and use the supplied 1/8 NPT for the oil temp sender. Having the oil pressure read 0 in the dash with the warning lamp will give me a lot of anxiety driving around. I do have the actual GM sensor/sender working, but it needs OBD2 as a gauge. If I'm datalogging I don't actually have a readout of what the gauge is currently displaying. 3) Other? Find a new location for the OEM sender? Though I don't know of anywhere that will work. I also don't know if a steel adapter is actually functionally smart here. It's clearly leveraged itself through vibration of the motor and snapped in half. This doesn't seem like a setup a smart person would replicate given the weight of the OEM sender. Still pretty happy being lucky for once and seeing this at the absolute last moment before bye bye motor in a big way, even if an adapter is apparently 6 weeks+ delivery and I have no way to free the current stuck/potentially destroyed threads in the current oil block.
×
×
  • Create New...