Jump to content
SAU Community

Recommended Posts

Sup,

I bought a Gizzmo IBC today to replace my ProfecA (it was going back to stock boost, after trying everything a dozen times, unit was getting old anyways)

I have read and understood the instructions completely. The unit has been installed as per instructions and operates to a tee. However I'm having 1 issue:

At almost any set duty cycle (boost pressure) - the car will overboost, and then quickly drop to the desired boost level. The higher the boost setting, the higher the spike. The higher I have the car revving before I plant it, the higher the spike.

I have it set at around 17 pounds, but I've seen it spike as high as 20-21 pounds. I now have slight oil on the intake side of the engine, looks like the extra pressure pushed the dipstick out a tad..

This is scary, I need help to fix this issue, until then the boost remains at 14 pounds.

One thing I have noticed is the Gizzmo solonoid is installed over where the stock PCM valve is.

(Please correct me in saying the PCM valve is related to regulating boost pressure? Because originally the electric plug on it was not plugged in, and I've since blocked both hoses to it?)

The hose length would assumingly be 2+ metres... Should I be moving the solonoid to a better (closer) spot?

Where are all of your solonoids mounted?

Cheers for the help in advance. :>

Edit: This happens even when using 0% gain on the Gizzmo. I'm only adjusting duty cycle. I understand the operations of the unit.

Edit: The car has N1 turbos, if this helps.

Edited by GTRPowa
Link to comment
https://www.sau.com.au/forums/topic/271373-gizzmo-ibc-boost-spike/
Share on other sites

Try playing with Spike Stop. Just make sure the solenoid is away from heat sources such as either manifold and intercooler. My solenoid is mounted to the left of my stock actuator, just make sure the unused port is facing down. The boost spiking could possibly be a intake manifold leak. Email Ray directly and see if he can help. I had trouble with my solenoid, and had to send it back (solenoid was completely dead, wouldnt respond to duty cycle or gain instructions from the controller)

Try playing with Spike Stop. Just make sure the solenoid is away from heat sources such as either manifold and intercooler. My solenoid is mounted to the left of my stock actuator, just make sure the unused port is facing down. The boost spiking could possibly be a intake manifold leak. Email Ray directly and see if he can help. I had trouble with my solenoid, and had to send it back (solenoid was completely dead, wouldnt respond to duty cycle or gain instructions from the controller)

This is the IBC, not the MS-IBC. This unit does not have Spike Stop. :<

Edit: Where is the stock actuator? Are you talking about the actuators on the turbos? Or the stock solenoid?

Edited by GTRPowa

The stock boost actuator, the Nissan bit that says PCM something on it. Between the battery and drivers side tower strut. Where on the intake manifold are you running the hose from into the solenoid, the vacuum source could be the problem. If you need I could get my camera and take a picture of the intake vacuum source i use with my MS-IBC

Well I've had a look in the Service Manual and found the PCM valve I suspected. That's where the solenoid currently is. I figured I could move it across to the other side of the engine bay, far reducing the length of the hoses and possibly removing some of the spike?

I can slowly ease off the throttle to keep it at the desired pressure, then plant it, and it'll stay there. It's just the initial spike (that also appears on the boost controllers screen as well as the guage).

I figured it's the delay between the Gizzmo solenoid and the wastegates? Since the hoses are quite long.

The aftermarket boost gauge and controller both T off the fuel pressure reg. I replaced all hosing today with new stuff. Very short efficient T off to reduce any possible lag.

The hose going to the controller has a strong Vacuum. All connections are tight. The controller shows the correct boost, including the overboost.

this is a fairly isolated issue as we install 2 -3 a week and have never had this issue, one thing to check is that the gain and duty switches were switched aroiund and that your not actually adjusting gain. if it still plays up send me the control unit and i will get it flased to the latest ibc firmware. We are building ray from gizzmo's (owner) new project at the workshop and see him regulary.

  • 1 year later...

I have not played with the gain or anything on my Gizmo IBC.

I have the same issue... I spike to 1.3 bar and drop to 1 bar. If anyone can recommend some settings with my set up to get the freaking thing to hit and hold, it would be great.

Nearly any boost I chase just results in huge spike then back to actuator pressure (or close to it)

could it be an exhaust restriction? i had some serious spiking from the exhaust but now that its fixed i have one of the best graphs i have ever seen 0 spike at all.

mine doesnt have an exhaust restriction however i have read having a free flowing zorst can also result in lack of backpressure which can lead to wastegate creep..

heres mine with hks adj heavy duty actuators

post-40640-1280978831_thumb.jpg

could it be an exhaust restriction? i had some serious spiking from the exhaust but now that its fixed i have one of the best graphs i have ever seen 0 spike at all.

I dont think I have an exhaust restriction. I run a RSR front pipe to some cat (with centre still in tact), then out to a 3.5inch stainless cat back.

I'm not really sure whether the cat is high flow or not, but its flowing enough to reach 260rwkw, so I doubt its not an upgraded item.

:(

I had a Gizzmo IBC mounted in my car (Cefiro with rb30det). It wouldnt hold boost no matter what happened. It cost me an arm and a leg refabricating manifolds etc as thats what I thought the problem was. In the end i mounted the 48mm wastegate straight off the exhaust housing (1.06 3540) and it was still open boosting. I got in contact with Ray who was really good and tried a number of tests and still couldnt fix the problem. He promised me a new one but the NZ rep just pissed me around for months so i gave up.

I ended up taking the car to get tuned anyway. I unplugged the Gizzmo unit and plugged the same solinoid into the Link Ecu and it worked fine. So if you have an interesting setup perhaps its the controller. Ray was good to deal with but his NZ rep isnt doing his company any favours at all. Shame the product didnt work though.

  • 1 year later...

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

    • The average previous owner for these cars were basically S-chassis owners in the US. Teenagers or teenager-adjacent. I often tell people that neglect is easier to fix than something that was actively "repaired" by previous owners.
    • Update 3: Hi all It's been a while. Quite a lot of things happened in the meantime, among other things the car is (almost) back together and ready to be started again. Things that I fixed or changed: Full turbo removal, fitting back the OEM turbo oil hardlines. Had to do quite a bit of research and parts shopping to get every last piece that I need and make it work with the GT2860 turbos, but it does work and is not hard to do. Proves that the previous owner(s) just did not want to. While I was there I set the preload for the wastegates to 0,9bar to hopefully make it easier for the tuner to hit the 370hp I need for the legal inspections that will follow later on. Boost can always go up if necessary. Fitted a AN10 line from the catch can to the intake hose to make the catchcan and hopefully the cam covers a slight vacuum to have less restrictive oil returns from the head and not have mud build up as harshly in the lines and catch can. Removed the entire front interior just shy of the dashboard itself to clean up some of the absolutely horrendous wiring, (hopefully) fix the bumpy tacho and put in LED bulbs while I was there. Also put in bulbs where there was none before, like the airbag one. I also used that chance to remove the LED rpm gauge on the steering column, which was also wired in absolute horror show fashion. Moved the 4in1 Prosport gauge from sitting in front of the OEM oil pressure gauge to the center console vents, I used a 3D printed vent piece to hold that gauge there. The HKB steering wheel boss was likely on incorrectly as I sometimes noticed the indicator reset being uneven for left vs. right. In the meantime also installed an airbag delete resistor, as one should. Installed Cube Speed premium short shifter. Feels pretty nice, hope it'll work great too when I actually get to drive. Also put on a fancy Dragon Ball shift knob, cause why not. My buddy was kind enough to weld the rust hole in the back, it was basically rusted through in the lowermost corner of the passenger side trunk area where the wheel arch, trunk panel and rear quarter all meet. Obviously there is still a lot of crustiness in various areas but as long as it's not rusted out I'll just treat and isolate the corrosion and pretend it's not there. Also had to put down a new ground wire for the rear subframe as the original one was BARELY there. Probably a bit controversial depending on who you ask about this... but I ended up just covering the crack in the side of the engine block, the one above the oil feed, with JB Weld. I used a generous amount and roughed up the whole area with a Dremel before, so I hope this will hold the coolant where it should be for the foreseeable future. Did a cam cover gasket job as the half moons were a bit leaky, and there too one could see the people who worked on this car before me were absolute tools. The same half moons were probably used like 3 times without even cleaning the old RTV off. Dremeled out the inside of the flange where the turbine housing mates onto the exhaust manifolds so the diameter matches, as the OEM exhaust manifolds are even narrower than the turbine housings as we all know. Even if this doesn't do much, I had them out anyways, so can't harm. Ideally one would port-match both the turbo and the manifold to the gasket size but I really didn't feel up to disassembling the turbine housings. Wrapped turbo outlet dumps in heat wrap band. Will do the frontpipe again as well as now the oil leak which promted me to tear apart half the engine in the first place is hopefully fixed. Fitted an ATI super damper to get rid of the worn old harmonic balancer. Surely one of the easiest and most worth to do mods. But torquing that ARP bolt to spec was a bitch without being able to lock the flywheel. Did some minor adjustments in the ECU tables to change some things I didn't like, like the launch control that was ALWAYS active. Treated rusty spots and surface corrosion on places I could get to and on many spots under the car, not pretty or ideal but good enough for now. Removed the N1 rear spats and the carbon surrounding for the tailpipe to put them back on with new adhesive as the old one was lifting in many spots, not pretty. Took out the passenger rear lamp housing... what do you know. Amateur work screwed me again here as they were glued in hard and removing it took a lot of force, so I broke one of the housing bolts off. And when removing the adhesive from the chassis the paint came right off too. Thankfully all the damaged area won't be visible later, but whoever did the very limited bodywork on this car needs to have their limbs chopped off piece by piece.   Quite a list if I do say so myself, but a lot of time was spent just discovering new shit that is wrong with the car and finding a solution or parts to fix it. My last problem that I now have the headache of dealing with is that the exhaust studs on the turbo outlets are M10x1.25 threaded, but the previous owner already put on regular M10 nuts so the threads are... weird. I only found this out the hard way. So now I will just try if I can in any way fit the front pipe regardless, if not I'll have to redo the studs with the turbos installed. Lesson learned for the future: Redo ALL studs you put your hands on, especially if they are old and the previous owners were inept maniacs. Thanks for reading if you did, will update when the engine runs again. Hope nothing breaks or leaks and I can do a test drive.
    • No those pads are DBA too  but they have colors too. I look at the and imo the green "street" are the best.
    • I’m not sure what happened I told them about sonic tunes free OTS tune and the next the I know .. I was booted..   To funny 
×
×
  • Create New...