Jump to content
SAU Community

Recommended Posts

Hi guys! Haven't been on here for a while and would like some help. I'm having probs with my boost controller and was wondering if anyone else has had problems with these too? Mine appears to not be working as i have hit 20.9 pounds boost when its set at 11psi, yes 20.9! Not good!! Tried it on low which is set to 8 psi and still went off the Richter.

Does anyone know what could be wrong with it?

The controller is about 18months old and brought it brand new from reputable dealer on SAU

Cheers

Link to comment
https://www.sau.com.au/forums/topic/246684-problems-with-profec-spec-b-11/
Share on other sites

hey man, i had similar issues but it was a wastegate issue. Have you upgraded turbo or anything?

On mine the standard wastegate couldnt open enough to vent the boost so i was meant to be sitting on 8psi and was reaching 22 :S and i am also running the same EBC.

So yeah could be a wastegate issue.

Edited by skylineguy19

correct Luke. Hi Lee :(

I have similar issues with my HKS EVC 5.......as Luke said, more than likely a wastegate issue. Are you running cheap short split dump pipes? They seem to be my problem where the gate either is restricted from opening all the way or the passage is too narrow to get around the gate, hence the spike issues.

i have a profec b II also, and you cant "set it to 11psi". you set it in percentages of the turbos capacity or something like that.

from what i have heard/read, the settings for a certain amount of boost vary depending on your turbo and other mods. ie: if you changed turbos, your previous settings might not get the same amount of boost. whats your high mode set to? mines at 57% but thats pulling 18psi. i figure youd want about 30%.

Thanx for quick reply guys! Hey Pete how's things :( . Only have standard turbs. Mods i have are the usual zaust, cooler, controller, pod. Does that rule out issues with wasegate? Could it be a faulty solonoid in the profec?

what do you mean by you have the ebc set at 11 psi and 8 psi? The Profec B spec II work on a percentage increase over stock. Their is also a gain setting which you use to make sure the boost is consistant throughout the enither rev range. eg. if boost is dropping of at high rpm increase the "gain" or if its spiking decrease the gain.

what do you mean by you have the ebc set at 11 psi and 8 psi? The Profec B spec II work on a percentage increase over stock. Their is also a gain setting which you use to make sure the boost is consistant throughout the enither rev range. eg. if boost is dropping of at high rpm increase the "gain" or if its spiking decrease the gain.

I dont set the boost, my mechanic does on the dyno. Was running fine for the last 18 months until it played up. I dont know the percentage, just what boost it runs which is 11psi on high and 8 psi on low. Either way its not working properly

pretty sure its the wastegate dude. the bolt that is inside the gate, on that arm which moves to allowboost e.t.c that bolt should be plum inside the gate, ifs its out check that or take it back to the dyno place! i had a profec in my car and only ever used high and low boost settings with the flick of a switch no % what so ever

  • 2 weeks later...

i just braught my self a pro fec b controller today, and ive set it up (on-intercooler pipe and con or sumthing to the waste gate... however im not hitting high boost... ive tryed everything like pumping up the gain % etc etc but it wont go over llike 8.8... its in my stagea (rb25 neo) and there are 3 lines that are blocked off now... have i dont it right?

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

    • Good luck on the weekend mate
    • Must have been an absolute nightmare to drive when the power steer was out, the rack ratio/wheel size/caster is all set up for power assistance
    • Welcome to SAU, what are you looking at buying?
    • I checked the injectors again (1 and 2, since they’re easiest to access) to make sure they weren’t clogged. Even though the entire fuel system had been cleaned, I wanted to be certain. Everything looked clean, so I reinstalled and connected everything. When I started the car to confirm everything was okay, it immediately revved up high, so I shut it off straight away. I checked to see if I’d missed a vacuum hose or something, but everything was connected. On the second attempt, the car ran without the high idle, but I noticed a distinct “compressed air” sound coming from the engine bay. Tracing the sound, I pushed injector #6 forward slightly and the noise stopped — it turned out it wasn’t seated properly, despite the fuel rail being bolted down. While holding it in place, the car idled steadily without stalling and ran for over 5 minutes. At this point, I pulled all six injectors out just in case I hadn’t seated them correctly or dirt had gotten onto the O-rings. Unfortunately, I discovered that I had damaged 3 out of 6 injectors (the OEM 270cc ones) during installation. So yes, this was my fault. Since only the pintle caps were damaged, I’ve ordered a Fuel Injector Service Kit from NZEFI to refurbish them. In the meantime, I reinstalled my new injectors – the car now idles fine for over 15 minutes without stalling. I have not attempted to drive it so far. It’s not perfect yet, as it hesitates when the throttle is pressed, but it’s a big improvement. Unplugging the IACV with the new injectors idles at around 800rpm, even with the IACV screw tightened fully. But this is probably due to tune.
    • I wanted to try and preserve the front bumper as long as possible, they're not cheap and are made to order in Japan. Taking inspiration from my previous K11 Micra build where I made an undertray for the Impul bumper, I did the same for this BN Sports bumper but a little slimmed down.  This time round I only made a 'skid plate' (if that's the correct wording/term) for just the bumper surface area, the Micra version covered the gap like an undertray. Starting off with a sheet of mild steel approx. 0.9mm thick 4ft x 2ft in size. I traced around the bumper, cut it out and cleaned the edges. Luckily I was able to get two halves from one piece of metal In the video I installed it as is, but I've since then I've removed it to spray and add a rubber edging trim. The rubber trim is suitable for 1-2mm and it's a really nice tight fit. The bolts had to be loosened due to the plates being too tight against the bumper, the trim wouldn't push on I used some stainless M6 flat headed bolts for a flusher finish (rather than hex heads poking down), I believe this style fastener is used for furniture too incase you struggle to source some. The corner's are a little wider, but this may be an advantage incase I get close to bumping it  The front grill got some attention, finally getting round to repairing it. Upon removal one fixing pulled itself out of the plastic frame, one side is M8 that fixes inside of the frame, where as the other side is M5. Not knowing I could get replacements, I cut down an M8 bolt, threaded it inside the frame along with a decent amount of JB Weld.  The mesh was replaced to match the bumper. One hole on the bonnet/hood had to be drilled out to 8mm to accommodate the new stud, once the glue had set it could be refitted. I think the reason the grill was double meshed was to hide the horn/bonnet latch (which makes sense) but I much prefer it matching the bumper Bumper refitted and it's looking much better IMO The Youtube video can be seen here: https://www.youtube.com/watch?v=bVZP35io9MA
×
×
  • Create New...