Jump to content
SAU Community

Recommended Posts

My previous ride was a mazda 626 turbo and when you gave it stick you could really hear a whistle on full boost but the intake airbox was stock with my new r33 gtst it has a hks pod intake and i cant hear a whistle more like a roar when change gears bov whoosh ok from hks ssbov how much is normal as some people talk about ticking and the like all i can hear is loud roar boost shows 7 psi stock and car does fly but i am concerned turbo suspect

only had car fews days and still under warranty so want to know.

Link to comment
https://www.sau.com.au/forums/topic/21876-intake-noise-no-whistle/
Share on other sites

well i got mine started up for the first time, and opening the throttle a little bit. You do hear a bit of a roar, but you can also clearly heard the turbo working.

Haven't driven it on the street yet.

However a mate with an rb25 has just a k&n airfilter and it really gives a healthy induction noise.

i dont think its much to worry about. if the cars drives the way it should, a few sounds shouldn't bother you....

well the stock dump pipe does have that terrible design for when the wastegate opens the gases go directly into a wall, and have to divert.

But i couldn't see how that would effect noise.

If you really want a loud on boost type sound, replace your standard rubber induction hose with alloy piping. You will notice a difference in sound.

Or maybe try changing air filters to a big K&N.

Do you have a 3 inch exhaust??

could be a number of things

mmm... mine doesn't 'whistle' as much.

Just sounds like a massive hoover. (without the motor noise)

Mine just sucks on full throttle and once i hit my full boost (4300rpm) at 9psi ATM... it goes more quiet and i just hear exhaust screaming.

Something to do with vacum or something i heard.

But at low throttle just crusing i can here a nice turbo whistle.

I have a t04e BTW.

the ceramic turbos sound different.

whistling, you will find it happends when you remove the air filter.

ive seen a few brand new soarers ect, hige top mount turbos no filters, and god they scream. it all depends on what air filter you have, boost amounts how fast you are going.

i find that about 230 i cant hear the turbo as much.

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

    • Yes to both! Yes to standard ECU and tune, but exhaust is aftermarket. Unsure on brand. Actually have it sitting in at my desk haha! I have to set it up on my laptop but this is a great next step, will do. So I generally try to shift before 4.5K RPM most times. I largely don't do a lot of high-rev driving, but I will take it up to red 1-2x a week max, as I know the occasional "Italian tune-up" is good for these cars.  Oh wow, is this way better than what I'm getting. Does this mean there's a good chance I have an issue?   Thanks for all the info so far guys.
    • Old Son, did you re-use the Holden ABS in the new shell or try a different module?
    • Yeah, nah. I had the actuator rod off it today. The arm will not move at all. Neither out, nor in. Yeah, you'd think so, but I've been thinking about that. Even when the actuator rod fell all the way off at the beginning of this saga, it would build more boost and faster in lower gears than it would in higher gears, and you'd think that that was the opposite of what should happen. But I strongly suspect that there is a thing with the gearing getting the revs to rise faster, that there must be some transient effect with the gas flow rate rising quickly, that you don't get with the more steady state case of the higher gears. Keep in mind - the gate is not shut in either of my weirdnesses. So things are not "normal". We normally think about a turbo spooling up (below the wastegate target) with the gate shut. I have all sorts of mental models running now where the gate is a little bit open, and having it stuck open allowing gas out while it should be going through the turbine has all sorts of weird effects (in these mental models). I'm thinking in the higher gears, the ex mani pressure builds to the point where enough gases spill out the wastegate to just prevent the pressure rising much more at all, or just creeping up, all the whole the revs are increasing and getting closer to the point where a gear shift becomes necessary.
    • Is it possibly wastegate actuator itself is sticking, or even the rod to flapper? Otherwise I reckon things are getting a bit rusty/worn   Also odd it won't boost in 3rd to 5th, but will in 1st, I'd expect the other way around with it slightly open as there's more time on your way to redline for it to spin up
    • Does anyone know ow what these two plugs are for and if they should be unplugged? Just put the dash back together and can't remember if these were plugged in before or unplugged! (Blue and white plugs) 🤦🏽‍♂️
×
×
  • Create New...