Jump to content
SAU Community

Boost Problem?

cdawg

By cdawg,
in Engines & Forced Induction

 Share

Recommended Posts

cdawg Apprentice

cdawg

Posted
Posted

hey guys,

have just installed a Speco boost gauge and Turbosmart boost controller (bleed valve) on a 1993 R32 GTS-T today. when we took it out for a spin boost gauge reads 14psi with the controller turned all the way down. it hits 14 then slowing creeps back down to about 10psi when rev's get higher. we pulled over and wound it up 5 clicks and still hits 14psi but quicker and still creeps down to about 12psi. have i installed everything correctly or could it be faulty parts?? anyone had this happen before???

cheers

Link to comment
https://www.sau.com.au/forums/topic/181448-boost-problem/
Share on other sites
Toasty Enthusiast

Toasty

Posted
Posted

its common that your boost does fall in higher rpm. it could be many reasons. such as bov, intercooler piping, silicon joiners, intercooler and anything else related to boost pressure. i am having the same problem and i beleive its the stock actuator. so i will be upgrading to the hks adjustable.

Link to comment
https://www.sau.com.au/forums/topic/181448-boost-problem/#findComment-3296272
Share on other sites
cdawg Apprentice

cdawg

Posted
  • Author
Posted
Ive got a manual boost controller and this doesnt happen to me, I reckon uve installed it wrong

the only thing i could have hooked up wrong would have been the boost controller! what will i notice if i hooked that up the wrong way? i might switch the hoses to see what happens....

Link to comment
https://www.sau.com.au/forums/topic/181448-boost-problem/#findComment-3296529
Share on other sites
munro'sgts-t Collaborator

munro'sgts-t

Posted
Posted

if its hooked up the worng way u will have full boost all the time, which way does the flow arrow point on ur boost controler if it points towards the actuator its right i think from memory i havnt looked at mine in a while. when i installed min ei could only wind it down to a min of 10psi cos of the exhaust apperently when u get a free flowing exhaust ur boost will creep up a bit

Link to comment
https://www.sau.com.au/forums/topic/181448-boost-problem/#findComment-3296538
Share on other sites
Taso84 Mentor

Taso84

Posted
Posted
if its hooked up the worng way u will have full boost all the time, which way does the flow arrow point on ur boost controler if it points towards the actuator its right i think from memory i havnt looked at mine in a while. when i installed min ei could only wind it down to a min of 10psi cos of the exhaust apperently when u get a free flowing exhaust ur boost will creep up a bit

Yea that is possible, but its also possible to hook it up wrong so u stay on stock boost, trust me, it happened to me once

Link to comment
https://www.sau.com.au/forums/topic/181448-boost-problem/#findComment-3304483
Share on other sites
Dose Pipe Sutututu Grand Master

Dose Pipe Sutututu

Posted
Posted

turbosmart boost controllers have a habit of boost creep. Just get yourself a TurboTech off this forum or eBay for under $30.00 and never experience boost creep again..

I'm running 14PSI all day, and I've never seen it spike.

Link to comment
https://www.sau.com.au/forums/topic/181448-boost-problem/#findComment-3304713
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
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • Kinkstaah
      Mistakes were made, my R34 Story

      By Kinkstaah · Posted

      I'm back from the dyno - again! I went looking for someone who knew LS's and had a roller dyno, to see how it shaped up compared to everything else and confirm the powerband really is peaking where Mr Mamo says it should. TLDR: The dyno result I got this time definitely had the shape of how it feels on the road and finally 'makes sense'. Also we had a bit more time to play with timing on the dyno, it turns out the common practice in LS is to lower the timing around peak torque and restore it to max after. So given a car was on the dyno and mostly dialled in already, it was time for tweaking. Luis at APS is definitely knowledgable when it came to this and had overlays ready to go and was happy to share. If you map out your cylinder airmass you start seeing graphs that look a LOT like the engine's torque curve. The good thing also is if you map out your timing curve when you're avoiding knock... this curve very much looks like the inverse of the airmass curve. The result? Well it's another 10.7kw/14hp kw from where I drove it in at. Pretty much everywhere, too. As to how much this car actually makes in Hub Dyno numbers, American Dyno numbers, or Mainline dyno numbers, I say I don't know and it's gone up ~25kw since I started tinkering lol. It IS interesting how the shorter ratio gears I have aren't scaled right on this dyno - 6840RPM is 199KMH, not 175KMH. I have also seen other printouts here with cars with less mods at much higher "kmh" for their RPM due Commodores having 3.45's or longer (!) rear diff ratios maxing out 4th gear which is the 1:1 gear on the T56. Does this matter? No, not really. The real answer is go to the strip and see what it traps, but: I guess I should have gone last Sunday...
    • GTSBoy
      What brakes on R34 GTT(Europe)

      By GTSBoy · Posted

      310mm rotors will be avilable from Australia, Japan, and probably a few other places. Nothing for the front can be put on the back.
    • MBS206
      Starting again

      By MBS206 · Posted

      The filter only filters down to a specific size. Add to that, the filter is AFTER the pump. So it means everything starts breaking your pump even if its being filtered out.
    • MBS206
      What brakes on R34 GTT(Europe)

      By MBS206 · Posted

      Just like in being 14mm too small (296mm) makes it not fit, being 14mm too big (324mm) it also won't fit. You want to find the correct rotor.
    • Kapr
      What brakes on R34 GTT(Europe)

      By Kapr · Posted

      @GTSBoy Ok so that was the shops problem...they showed R33 rotors on R34 page and i did not know 296 do not fit(and are for R33) Yes i bought "kit" with rotors and pads. Pads are ok(i have GTT calipers front and rear). They have some 324mm but no 310mm. So i dont know if they would fit. I have 17inch LMGT4s So another question. Can i fit those in the rear or they are just "too" big for that?
×
×
  • Create New...