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Possible Boost Cut.

Plattsy

By Plattsy,
in Engines & Forced Induction

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Plattsy Grand Master

Plattsy

Posted
Posted

hey ho here we go. im back. r33 s1 gtst r34 smic and rb20 actuator, 3 inch cat back exhaust all installed this weekend, car is great as the boost builds up but when its hitting +7 on the standard boost gauge, it boosts fantastically then all of a sudden its like i hit a wall, although im still moving. i don't know what happens after this point because i let off straight away. i did it twice then thought i better ask the boys for help!

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Plattsy Grand Master

Plattsy

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  • Author
Posted

mother fudger! i didn't think it would be hitting that much psi, i was informed the actuator would allow 10 which is fine! crap crap crap.

bloody ecu. i really dont wanna aftermarket. i wanted to keep as stock as poss. which is why i used the nissan parts instead of the t boost!

GTSBoy Grand Master

GTSBoy

Posted
Posted

R33s have gay ECUs. If you Nistune it you must use either an R32 or Z32 ECU as the base, with a little extra fiddling around needed. I don't know how easy it is to put in a burnt ROM like Dr Drift used to do, as pretty much no-one does it via such annoyingly slow methods any more.

Also, I am very surprised to hear that you can get less boost than the wastegate actuator wants to give you by using a boost T. That's kind of impossible.

KiwiRS4T Grand Master

KiwiRS4T

Posted
Posted

R33s have gay ECUs. If you Nistune it you must use either an R32 or Z32 ECU as the base, with a little extra fiddling around needed. I don't know how easy it is to put in a burnt ROM like Dr Drift used to do, as pretty much no-one does it via such annoyingly slow methods any more.

Also, I am very surprised to hear that you can get less boost than the wastegate actuator wants to give you by using a boost T. That's kind of impossible.

Quite right - sorry for the bum steer - looks like ecu time alright. Give Nistune a ring and they will spell out which Z32 ecu you need etc.
scotty nm35 Grand Master

scotty nm35

Posted
Posted

im just surprised, the "10psi" actuator is actually giving me 13!

Are you still running the stock boost solenoid? Just run a new hose from the actuator straight to the nipple on your pipe if you haven't already.

Plattsy Grand Master

Plattsy

Posted
  • Author
Posted

There are three pipes left, all connected via a t piece, one goes to a pipe that joins the intake hose, one goes to the nipple on the cooler pipe, and one goes to the actuator. Please tell me this wrong!

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