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Benjamin_John93

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Posts posted by Benjamin_John93

    Help! Cars Overboosting

    in Forced Induction Performance

    Posted

    So turns out that not only was the boost signal coming from manifold the problem but also both my factory boost solenoid and boost tee are faulty.

    I ran the hose straight from the intercooler to wastegate and get 5psi with no issues, i then wanted more boost so i connected the hose from intercooler to stock boost solenoid(the top nipple) and a hose from wastegate to the solenoid(bottom nipple) and thr car ran like shit and then died on me about 200m down the road.(and yes the solenoid was plugged in)

    So now im running a 10psi wastegate from an r32 which seemed to be working perfectly the first time i drove it, went to drive it again later that night and as i was slowing down for lights it died on me and started running like shit (im assuming it R&R).

    So im wondering if i keep the 10psi actuator on is the car gonna keep going into r&r until i get an aftermarket ecu + tune?

    And is my boost solenoid had it or am i plumbing it up wrong?

    Help! Cars Overboosting

    in Forced Induction Performance

    Posted

    Look.  The actuator doesn't matter a shit.  They're both 5 psi items.  What matters is that your boost source is coming from somewhere wrong.  The fact that there is no nipple to connect the boost control to on the intercooler pipework IS THE PROBLEM.  Trace the connection back to where it comes from.  if you cannot see/prove that it is 100% from upstream the throttle, with no solenoid valves or check valves or anything else in the way, then fix it.  This will mean PUTTING A NIPPLE ONTO THE PIPEWORK.  Which would be 100% what the doofus who installed it all should have done, and apparently didn't.


    Okay thanks heaps mate I will tap a fitting into the pipework and run it straight to the actuator for now, ill be sure to let you know how it goes.

    Thanks again for the help, really appreciate it :)

    Help! Cars Overboosting

    in Forced Induction Performance

    Posted

    There should be a nipple on the intercooler pipe that goes to the throttle body. That should be the boost source. Doesn't sound like yours is like this.

    Remove the boost controller and run the line direct from your boost source to wastegate actuator and see if you get low boost.


    Cant find any hoses on the intercooler piping that run to throttle body, there is one hose that runs from throttle body to charcoal canister?

    Help! Cars Overboosting

    in Forced Induction Performance

    Posted

    And failing that.....the boost signal must be from the compressor housing, or some point on the turbo-intercooler-plenum pipework.  Anywhere else is stupidly wrong.


    There is nowhere on my turbos compressor housing to connect the hose to like there should be, and nothing on the intercooler piping either.

    Could the issue be that the hose goes from manifold to boost tee then wastegate?

    Help! Cars Overboosting

    in Forced Induction Performance

    Posted

    Finally got myself a 1996 R33 GTST after owning a few n/a's.

     

    Car is stock except for front mount intercooler and boost tee(currently wound all the way down).

    3" exhaust from turbo back, cat has been gutted.

     

    But im having issues with boost. I only want to run 7-10 psi max but for some reason the boost will just continue to climb untill over 15psi then starts to cut out. I have tried using the stock boost controller but makes no difference.

     

    Car had a boost leak which i thought was the problem but i did a boost leak test and fixed the leak, problem still exists.

     

    I decided to check out the wastegate actuator but seems to open perfectly fine(not hitting dump).

     

    On inspection of the turbo i noticed that there was no compressor outlet where a hose should run from it, to the boost controller, then into the wastegate actuator shouldnt it? Instead my car has a T piece from a hose that goes from the manifold to the charcoal canister?

     

    Dont know much about turbo cars as this is my first and really dont understand why its overboosting so much?

     

    Advice Needed In De+t

    in Forced Induction Performance

    Posted

    Okay after a lot of thought and reading through all the replys im thinking of giving the car a tidy up and try and sell it, then buy an r33 gtst with the money hopefully.

    Thank you to everyone who opened my eyes on this, glad i didnt just go ahead otherwise i would have most definitely destroyed my engine.

    • Like 3

    Advice Needed In De+t

    in Forced Induction Performance

    Posted · Edited by Benjamin_John93

    So i have been collecting parts needed to do a turbo conversion on my r34 rb25de Neo for quite some time now and am keen to go ahead with the conversion.

    I have:

    -R33 turbo

    -R33 turbo manifold + dump

    -R33 SMIC + piping

    -Braided water lines/banjos

    -Braided oil line/banjo + oil retun

    -Boost Tee, boost gauge.

    I wanna know if i can run 5psi max with the stock rb25de Neo injectors, fuel pump and N/A ecu?

    It seems every conversion i have seen has been done different, the setups i have seen so far are:

    1) N/A injectors, N/A ecu, walbro fuel pump. Boost at 5psi

    2) 370cc injectors, Gtt ecu, N/A fuel pump. Boost at 5psi

    3) 370cc injectors, Emange blue ecu, walbro fuel pump.

    So can i convert my rb25de Neo to a turbo using the N/A injectors and fuel pump if i dont go over 5psi?

    Oil Return Bung Size?

    in General Maintenance

    Posted

    Hey guys looking to do a turbo conversion on my r34 soon and just piecing together the parts i need before i begin.

    I have checked the side of the engine for an oil return, found that it has the bung which should make things alot easier, i am just wondering what size the fitting needs to be?

    Thanks! :)

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