Jump to content
SAU Community

Running 4psi

Qunto

By Qunto,
in Engines & Forced Induction

 Share

Recommended Posts

Qunto Contributor

Qunto

Posted
Posted

Hi,

i just bought a R33 SII 97 GTS-t and i have noticed that on the internal stock boost gauge that it never reaches +7 psi.

The car is in stock condition, as far as i can tell, but it does look like it has been detuned by the old fart that had it before.

How can i tell if i'm running 4 pound or 7 pound amd if it is running 4, how can i make it 7?

Any ideas

Link to comment
https://www.sau.com.au/forums/topic/52114-running-4psi/
Share on other sites
lfmfrancis Newbie

lfmfrancis

Posted
Posted
Factory boost guage isn't in psi...  It's in mmHg...

 

Use an online conversion utility if you want to be exact but it's roughly half...

Hi,

I wonder if anyone could enlighten me what caused my factory boost gauge to shoot up to +7 when I switch on the ignition. I had been having this problem for some time now. I suspect it's something to do with the wiring as I ended up changing a second hand auto-transmission trying to solve the problem of gear not shifting correctly but to no avail. The car will start on 1st gear on D but will not change gear unless I rev it to 4000rpm or more. However once in a while, the boost gauge reading will return to normal(ie around 0 boost when the ignition is turned on) and the gear will change very smoothly and engage 2nd gear at about 1500rpm and 3rd gear at around 2200rpm.

Any views or assistance appreciated.

Link to comment
https://www.sau.com.au/forums/topic/52114-running-4psi/#findComment-1029564
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

    • Duncan
      S1 rb25/s14 starting problem

      By Duncan · Posted

      Depending on how long the car sat it is very possible for injectors to be stuck open or closed, I'd get them cleaned and flow tested. Other than that, obviously when the loom changes and the car doesn't start any more....the loom is suspect so some tracing / comparing may be required
    • 25zenki
      S1 rb25/s14 starting problem

      By 25zenki · Posted

      Harness is for a s1 Rb25det, and it is engine and lower harness.  the old harness had broken off plugs and was in very rough condition/exposed wires and splices etc. it is not able to be put back on the car, I could visually inspect to see if they had rewired any pins on the ecu plug. The fuel pump definitly isn’t turning off it’s an external pump and very loud you can hear it. Will look at the other harness tonight, am also going to pull the fuel rail and watch the injectors spray, will update here with what I find. Pretty sure at this point it has to be something to do with injectors because car will fire up on starting fluid and cas is clicking the Injectors. Fuel pressure is steady 43psi 
    • Waders360
      M35 Brake caliper replacement

      By Waders360 · Posted

      Sorry. Front brake calipers
    • MBS206
      S1 rb25/s14 starting problem

      By MBS206 · Posted

      Check the injectors flow evenly, and are actually flowing what you and the ECU think they should be flowing. If it's starting up on starter fluid, you have a fuel issue. Is it possible under cranking your fuel pump is turning off?   The harness you replaced, is that the whole engine harness? Do yourself a test, and drop the old harness on and plug it into the Z32 ECU. It's possible they've wired things different. From memory S1 to S2 is different in RB25 and you may have a wrong loom
    • 25zenki
      S1 rb25/s14 starting problem

      By 25zenki · Posted

      I haven’t pulled the injectors to watch them spray yet but they are clicking from the cas and all of the spark plugs are wet with fuel. I’ve thought the cylinders were being flooded from the beginning and was hoping fuel pressure would fix it. Tonight I am going to pull the rail and watch the injectors spray. Don’t know how to test/diagnose if the plugs are firing in correct sequence but that should be a timing thing and as far as timing goes my car still has the half moon for the cas can only install it 1 way. And my mechanical timing is 100% correct I posted photos above. Confirmed with the balancer on and off. 
×
×
  • Create New...