Jump to content
SAU Community

Recommended Posts

I have had my r33 tuned and all is good but the on high boost the boost gauge flutuartes from 1 bar t0 1.2 bar.

I have a good deal of mods:

sm4 altronic

555cc nismo inj

HKS intercooler

Greedy rs BOV

Garrett 450hp turbo internal gated

mid mount ex manifold

oil cooler

ect.....

I am make 300rwkw on highboost

what could cause this boost spike/flutter. ...........wastegate or valve float or some thing.

or I might just turn the high boost down a fraction! and see what happens!!

Link to comment
https://www.sau.com.au/forums/topic/175126-boost-fluttering/
Share on other sites

i was thinking maybe the pipe you got from your turbo to your filter is possibly contributing to flutter maybe by its design, length, etc. this might be the case, someone with a bit more experience should give you a good answer, but most of the time its a blow off valve setting.

hey i get the same problem! i have an rb20 with a td06 and all the goodies, i run a apexi power fc boost kit, and i noticed that when on ful boost (which is only 14psi) the needle on the gauge flickers like crazy it is like a big blur it moves that fast? and i dont have a blow off valve at all! with all custom pipe work, i cant seem to find what it is.

i read this thread jumped in my car and it started happening.

i got an avcr tuned less then a fortnight ago z32 afm custom piping and a stock turbo with no BOV at all. i presume if i had any leaks it would have been braught up when tuning, thats why i dont have a bov, had a cheap china one that was leaking.. is there a quick and easy and cheap way to fix???

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

    • Actually, that's not entirely true. It's also the same motor in the 1st gen Nissan Cube but they're rare as hen's teeth.  
    • Yeah it is always worth testing and balancing actuators out of the box, just set the pressure regulator on a compressor very low (eg 5 psi) and increase it slowly to see when they both move.....unfortunately while you may be able to adjust the length of the actuator rod to minimise any difference, the actual pressure they move from is not adjustable so you need a well matched pair. And yes, the VCAM is probably contributing; the earlier in the rev range they come on boost and the slower the revs build (I think your demo was in 5th), the more you notice it.  Driving at WOT through 1st, 2nd, 3rd etc you will probably never hear it as any shuffling starts and is over super quickly
    • oh they were with that motor, you need to remove the engine to change the spark plugs (don't have to, but it does make it easier)
    • I certainly fall into the annoyed camp, but glad to hear that if it's happening at low boost then I'm not likely going to blow a turbo and end up with metal shards in my oil. Just feels like it prevents me from really driving it without hesitation and "peak" performance. Wonder if it's the VCAM, it did an impressive job of shifting the torque curve and faster spool, but maybe now it's "too fast" and there's too much air for how open the throttle is.  Based on some other threads, will also do some reading on synchronizing the actuators. They are the default actuators that come on the Garrett's and I would think they would be set the same coming from the factory, but if the turbos don't actually work exactly the same way at the same time as previously mentioned, it would be worth making sure the actuators are actuating together properly
    • I went down this rabbit hole before, ended up sourcing a motor from the UK (I'm in Japan) which also didn't function correctly. With the original motor, I disassembled it and reassembled it and it works somewhat, sometimes. What I could deduce from all my screwing around is that there is calibration of the gears on the inside of the motor and two ramps on the main gear which activate switches that operate the motor and move the sunroof either to retract into the roof or tilt. Where I got stuck was that, it seemed in my case that one or both of the switches that are activated by the ramp on the gear did not always activate and thus the motor did not move, causing it to sometimes not retract or tilt (apologies, I've forgotten which way it didn't work.).  Of course this part is discontinued at Nissan now, it's the same part in the S15 but no other models. I also contacted the manufacturer of the component for schematics - forgot the name, they're based in Gifu - but they declined to share the information due to being bound by an NDA, sadly. Looking through my pictures now, it seems I last had a crack at this in 2022. See, I so kindly wrote "open" and "close" next to the switches. If you figure it out, please do tell me. Those little switches, with the red buttons may need to be replaced.
×
×
  • Create New...