Jump to content
SAU Community

Recommended Posts

Hi guys I am a fairly new owner of a r33 gtst. I think I may have a problem and I am sure someone on here can help me out .

The Problem

At high rpms when I let off the throttle I hear a shhhh sound. it doesnt happen when I accelerate slowly or drive without pushing the car hard.

I have done a bit of reading and it seems to be a compressor surge. can someone help me figure this out

Link to comment
https://www.sau.com.au/forums/topic/441877-compressor-surge/
Share on other sites

  On 14/04/2014 at 2:52 AM, superben said:

So technically when asking what noise or why does my car idle like shit and stall you should say it's all stock except for the bov ;)

i assumed the skyline came with a bov stock...like I said i m new to this

Yes, all turbo Skylines (R32 -R34 series) come with a 'recirculation' valve from factory. ALL of them make a 'pshhhhh' noise when the throttle is backed off. It will be louder if there is a pod filter, or if the standard airbox is modified.

Is it a psshhhhhh noise or Zututututututu noise :whistling:

They do come with a bov stock, but for some reason people change them.

Take a photo of your engine bay.

I guessed auto cos you don't tend to hear the bov with an auto as you don't lift off the throttle on gear shifts.

Look into getting a shift kit to liven up the auto,and to make it live longer.

Model specific dual port. Should be O.K, I think you can make it so it only runs plumback (which is what you want)

If you have the stock air box and can hear it, chances are it might be venting to atmosphere, Spring rate might be a touch to high as well

Set it to full plumback (I'm sure you can have one, the other, or both on these) and see how it goes

That valve will do what you need if it is hooked up to recirculate properly. Should be some kind of adjustment on there.

unfortunately that will score you a defect notice though if the police know what they're looking at. If you want to replace it the stock GTST valve or GTR valves are good enough

Hahaha.

That's pretty funny, you heard a blow off valve sound, mentioned it had a blow off valve and then sure enough it was the blow off valve making the sound!

Welcome to the forum, read heaps! There is an endless supply of info to help you.

Put a stock bov on, a defect isn't worth it.

thanks for the input guys I will adjust the bov and see what happens. I personally don't like my car making any kinda noise that attracts unwanted attention from cops or anyone. Unfortunately the car came with the aftermarket bov. the only mods I have done is a Tanabe exhaust and hicas elimination bar and deep dish 18 inch wheels.

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

    • Hows your intake piping? Are you still running stock? Having in the stock AFM position would mean, if the BOV was shut/venting out, it'd create the almost stalling kind of effect right // "the rich pulse behaviour" due to MAF thinking air is flowing ? But this would be better than having the bov in the stock position + MAF on/just before cross over piping right?
    • Essentially, yes. Although I wouldn't put the AFM on the crossover pipe. I'd want to put it into what amounts to the correct size tube, which is more easily done in the intercooler pipework. I bought a mount tube for card stile AFM that replaces the stock AFM - although being a cheap AliExpress knockoff, it had not flange and I had to make and weld my own. But it is the same length and diameter as the stock RB AFM, goes on my airbox, etc etc. I don't have a sick enough rig to warrant anything different, and the swap will take 5 minutes (when I finally get around to it and the injectors & the dyno tune).
    • So to summarise, the best thing to do is to move recirc to between turbo and IC, and maf on the crossover pipe. Meaning I'd need a recirc flange, drill a hole in the piping on turbo outlet area. And drill hole on crossover to fit/weld maf sensor? Either that or put the MAF on the turbo inlet right?  Is an aftermarket recirc/blowoff valve recommended? Do currently have family in Japan so could probably bring something back with maybe a cheeky lil SuperAutobacs run?
    • Yep, so far most have said that it looks like corrosion on the wall from piston not moving. Which then has probably damaged the oil rings and caused those vertical marks. The longest the engine was still after the rebuild, was the winter of 2018 - 2019, plus the boat trip to Japan. When I shipped the car, it had normal gas in the tank but before that winter pause, it had E85 in tank.  In any case, even if either one of those was the cause, it happened close to 6 years ago and the car has been driven something like 30 000kms after the fact. Again, apart from the plugs and the dip stick, there is nothing in the way the car runs that would indicate what has been going on in the engine. I am going to consult a shop and ask their opinion, what would be the best approach. I do have some access to a garage I could use to diagnose further myself, but time is very restrictive. Might end up buying another engine that could be used while this one is being remedied. Without pulling the head, it will be impossible to find out if it needs another bore, but here's to hoping a hone would suffice.  Goddamnit, I would really have preferred this not happening.  
    • Boot is going to be replaced eventually. I just wire brushed what I could and rust converted. Then painted in rust kill primer. the spoiler also got repainted and plugs replaced on the ends. The under side of the bonnet is going to be black also, currently white. But red on the top side, same colour code as the silo to begin.
×
×
  • Create New...