Jump to content
SAU Community

Overboosting/Freeboosting

VIP32

By VIP32,
in General Automotive Discussion

 Share

Recommended Posts

VIP32 Collaborator

VIP32

Posted
Posted

Can anyone help because my RB25 is free boosting, when i accelerate hard the BLITZ SBC eltronic boost controller seems to bleep and go read as is gones over safe boost, This is not the solinoid as i have already replaced it. I need help as im scared of blowing the HKS25/30. My actuator pipe is on. Though im having problems with my coil packs but under my understanding im sure that does not effect my boost at all. Not sure what to do because the car does not perform when its free boosting.

Link to comment
https://www.sau.com.au/forums/topic/76454-overboostingfreeboosting/
Share on other sites
twoquik Mentor

twoquik

Posted
Posted

well if your gain setting is up to high your car will over boost, its a 1-100 setting, mine is set at 12-15 im not sure if aftermarket turbos can be set higher but have a play try setting at 15 and see if it still does it, not sure if you also know that when changing the setting the controller will take 3 or 4 learning runs before it sets itself so you will need to do 3 runs up to high revs see if it makes a difference anyway. do you have a manual for it because i can post one up for you. is it the id3 that you have?

twoquik Mentor

twoquik

Posted
Posted

yes try 15 the higher you go the faster boost will come on, so if you had it on something like 60 its going to boost spike, so try 15 and do 3 runs as it will be in learn mode for a few runs and see if it makes a difference, im looking for the manual for you at the moment.

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

    • Erelyes
      Ceramic turbine damage to engine - what did yours do?

      By Erelyes · Posted

      Ha, well, it's been.... a bit of a journey. Things have taken much longer than I'd hoped. I'll probably put up a thread at some stage. Hopefully soon. The car's not done any kms since my update in June though, put it that way.
    • Dose Pipe Sutututu
      M35 Aftermarket Fuel Pump

      By Dose Pipe Sutututu · Posted

      Here's the chart for fuel pressure vs. current draw, assuming your base fuel pressure is 3 bar and you run like 0.5bar boost on WOT, you should only momentarily hit 9amps here and there. (Ignore my prev post, I cannot read a chart these days it seems)
    • GTSBoy
      RB25 Drama's

      By GTSBoy · Posted

      Those comp test results are not hideous. Whether they are accurate or not (ie, when that comp tester says 140 psi, is the real pressure120, 140 or 160?) is unknown to us. The state of the battery used to crank it over is unknown, etc etc. Many people around here would say that the absolute values and the spread are perfectly fine to just add boost and keep going. I personally would be happier with a narrower spread than that, but even the diff between 125 and 145 is not terrible. That one cylinder at 125 though, has probably copped some damage relative to the others. You should inspect the valves seeing as you've got it open. Do you know how to measure installed ring gaps? That, and an inspection of the rings themselves, is how you will determine whether they need to be replaced. If you're not good to do these things, take the block and the pistons and rings to a shop that is, and ask them for the go/no-go on them. Do the bores need a hone at all? If so, you might well be justified in getting some different pistons in order to get away from the ring supply problem. Whether you're happy to spend a lot more money right now, on more gear, rather than less money, but an amount that looks stupid given that you will only get a handful of rings in exchange for that money, is for you to decide.
    • iain_ST44GA
      M35 Aftermarket Fuel Pump

      By iain_ST44GA · Posted

      also possibly backed up to my filler and shat down it! 🤣
    • Julsmadrid
      RB25 Drama's

      By Julsmadrid · Posted

      Ok so i would love some advice here please, i purchased an R33 a few months back and its had a few mods done to the engine, its an RB25det running a Master ECU, 1200cc injectors, bigger turbo, oil cooler, oil filter relocation kit, Spool H-beam rods, acl/ross pistons. When i removed the motor from the vehicle (as its getting a respray) i thought i would compression test it and these are the following results. Cylinder 1-145psi, Cylinder 2-143psi, Cylinder 3-125psi, Cylinder 4-145psi, Cylinder 5-140psi, Cylinder 6-135psi this test was done with the motor on the ground and powering up the starter motor. I dropped the sump and found broken oil squirters on cylinder 3,5 and 6. I was told my rings are probably worn so i stripped the motor completely to get a new set of rings for it. The trouble is no one has these rings anywhere and they have to be custom made by Ross over in the states and will cost about $600+$200 delivery. My question is how can i tell if my rings are at fault and if they are still ok and is this price ok for a set of rings?
×
×
  • Create New...