Jump to content
SAU Community

Recommended Posts

Hey guys, Ive got some boost issues i cant figure out, its driving me NUTSS..Well, im not making more than 0.1 bars of boost (havn't tried boosting it yet). The car drives o..k with almost no lag until the time boost is meant to kick in, you dont feel the lag once your in boost mode, but both my A/M Apexi boost gauge and stock gauge show me that im running under boost, also the car doesnt have that 0.5 bar pull it once had. i have tried the following with no positive outcomes:

- Change all vacuum lines

- Change wastegate to R32 wastegate (as soon as i changed this, i had a boost up to 0.7 bars but with heaps of lag and backfires, so pretty much no difference)

- Change Intercooler Pipes (not core, although core has some dents in the fins which i doubt would cause a leak or anything)

- Replace Cat with De-cat Pipe (incase i had a blocked cat)

and....nothing else so faar.

i should also mention, i have takin my car for a dyno tune and the guys there tottaly gave up on my car (but back then the car was having some other issue which has been takin care of)..by the way, when it was worse then it is now, i pulled out exactly 143.2 hp...isn't that sexiful hey..lol

Neways guys, PLEASE HELP ME OUT, im wanting to mod my car but dont want to mod it and increase possibilities of a dead engine..

Edited by A-B_DR/fT-KinG!!
Link to comment
https://www.sau.com.au/forums/topic/247039-r33-boost-issues/
Share on other sites

hey guys, found out that my boost gauge vacuum hose was almost off!!!. fixed that up and im now getting 4.5 psi below 4500rpm and 6 above...

its gone better although i thought it was meant to be getting 10psi with the r32 actuator??..am i not right??..

Edited by A-B_DR/fT-KinG!!

Disconnect the vacuum lines on the boost solenoid (located behind your airbox/pod) and join the two ends thus bypassing the solenoid. This way, the amount of boost you run will be dependent on the actuator; in this case, 10psi.

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...