Jump to content
SAU Community

Recommended Posts

Hey peoples,

I got a 93 r33 gtst, its got a 3 inch exhaut and a k&n pod filter among other things but they are the engine mods that im aware of. It has a greddy boost controller-just the turn dial one from in the engine bay. Whe i got it i knew that the boost was tweaked abit and have since been playing with it abit. I was having problems with it and people have told me that what im experiencing is boost cut!!! If i was cruizing along in 3rd at round 60 and then plant it once it hits between 3 and 4 grand it jolts and comes good then jolts and so on. So i turned the boost down 2 notches and tried again, still happening, so another 2 notches and now it doesnt do it but there is a major difference in power now. I mean on a cold night it was pretty good at the previous boost levels aslong as i stayed above 3500rpm in 3rd 4th n 5th. So on the highway it went really well but round town i notice the stuttering more so now. I changed the plugs and put iridiums in and also changed the fuel filter. And gave it a service. I only got the factory boost gauge and was unsure of what it was running before but it used to stop at 7 but now after turning it down 4 notches it is on bout 6. Much much slower on boost now. Not happy with it and want to know if there is anyway to get around this boost cut situation without getting a front mount?

Link to comment
https://www.sau.com.au/forums/topic/22734-boost-problem/
Share on other sites

sounds like a good tip..... only with mine the problem has been cured by removing the cheap and nasty mechanical boost controller.....all I need to do now is work on restoring the kick ass power I was used to. From what I have learned recently a good electronic boost controller is the way to go.

Cheers

Chris

Link to comment
https://www.sau.com.au/forums/topic/22734-boost-problem/#findComment-490350
Share on other sites

OK - if your getting a reading of 6-7 on the factory boost gauge that means your running about 13-14psi !! (7 on the factory gauge is close to 1 bar).

It will be the factory boost limit or your plugs. Regapping your plugs to 0.8mm might help.

I wouldn't recomend that you run more than 10psi if it's a series 2, and 12psi if it's a series 1.

J

Link to comment
https://www.sau.com.au/forums/topic/22734-boost-problem/#findComment-490381
Share on other sites

yep, it's a series one.....I have an auto meter boost gague, with the origional disconnected. As mentioned above the car now runs smooth, I just need a reliable and controlable way of reaching the 10.5 psi it now reaches through a restricter. I don't think it needs to boost any higher than that.....just want to get there a bit quicker!!

Ta

Link to comment
https://www.sau.com.au/forums/topic/22734-boost-problem/#findComment-490393
Share on other sites

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

    • Thanks everyone for the replies and suggestions. Got the seats out (hoping I could find some existing grommets but no such luck). By tapping and measuring etc. I could figure out where I could drill through if needed. But first I borrowed an inspection camera and managed to go through factory holes in the chassis rail and could see that the captive nut was holding steady which is why it could retighten. So it was indeed a stripped section of thread, so I applied downforce by levering the bolt head with a screwdriver and went slowly back and forth until it came out. Camera helped a lot cos I could monitor that the captive nut was holding tight. Now I just have one very seized main subframe nut to tackle 馃槄
    • BOVs do have a purpose, if you ever log pressure before and after the throttle body, you will see a spike pre throttle on lift off from a WOT condition. Enough to bend throttle blades / damage e-throttle motors or simple assist in blowing off cooler pipes. FWIW, the above on really applies to those running at least 2 bar of boost. OP shouldn't have an issue, on the other hand, here are some videos of my shit box over a decade ago with some succulent dose with the airbox on and off. That shit box is unrecognisable these days 馃珷    
    • I've tried all different combinations of BOVs/ no BOV and stock bypass valves over the years, on gear changes the stock bypass valve seems to get the car back on boost quicker because in part the turbos wheel speed isn't being slowed down by reversion, although they have issues holding boost much over the stock setting. Most aftermarket BOVs you can adjust the spring, tighter will make it open later and close sooner, but in my experience it'll cause a bit of flutter at low load/rpm anyway. I've also got some input into this whole no bov causing turbo wear, never had an issue on any on my turbos HOWEVER, I got my R33 GTST with 200k kms on it, with from what I can see still has the original turbo, no lateral shaft play but has about 4-5mm of play in and out which to me seems like a worn thrust bearing from years (100-150k kms?) of turbo flutter running no bov, so maybe there is some truth to it in the long run. But that'll never stop me loving the Stutututu while I have the car.   OP just wants to know if he can run a atmo vented BOV with no major issues and the answer is YES, plenty of people do it, there's no harm in installing it and seeing how it runs before spending $$$ on an aftermarket ecu, last time I bought a Nistune it was $2400 for install and a tune , unsure of todays prices but you get me. Crazy money to spend just to fix the minor inconvenience of stalling that can be overcome by letting the revs come down to near idle before putting the clutch in or a little bit of throttle to avoid it. You're better off leaving the ecu and tune for after a bigger turbo/injectors have been installed to take full advantage of the tune and get your moneys worth.   Let OP have his Whoosh sound without trying to break his bank haha
    • I see you missed the rest of the conversation where they have benefits, but nothing to do with avoiding breaking turbos, which is what the aftermarket BOV made all the fan boys, tuners, and modders believe was the only purpose for them...
    • But they do so for the other reasons to have a compressor bypass. It's in the name.
  • Create New...