UTEC boost controller
I got it switched over to closed loop but didn't have enough time to get it set properly. 150 wasn't enough (about 8psi), but 200 was over 11psi. We've had some real wet and cool weather around here so its been really hard to do anything with the car.
Originally Posted by KPierson
I got it switched over to closed loop but didn't have enough time to get it set properly. 150 wasn't enough (about 8psi), but 200 was over 11psi. We've had some real wet and cool weather around here so its been really hard to do anything with the car.
that's wierd how "150" hits 8 psi for you, yet I hit 8 psi with a value of "45."
I spoke with Jermaine about it and he siad it has to do with the greddy kit using external wastegates as opposed to the APS actuator setup.Are the APS actuators single port or dual port?
Last edited by QuadCam; Apr 16, 2007 at 09:31 AM.
Well, I'm also running different actuators. My min boost is around 7.5psi, so at '50' the boost controller isn't doing much, besides allowing me to build boost faster.
I'm not sure if they are single or dual.
I'm not sure if they are single or dual.
I'm not sure on that either, but I would guess one. I know that I have one line that is pre throttle body that goes to my solenoid, then the other side of the solenoid goes to the solenoid. One port of the solenoid is open.
I've ran in closed loop for a few days, and through different temperatures (got to love Ohio weather).
On my original tuning date (mild temp) the car would boost just under 10psi.
Then it got cold, and I was over boosting and hitting my 11psi fuel cut.
Now, its warmed up and I'm only making 8 psi of boost.
This is the EXACT reason I switched over to closed loop control, so temp wouldn't be a factor. Has anyone else noticed this? At this point I think I'm going to go back to open loop control and not even mess with the closed loop. At least with open loop I'll know exactly what it is doing at all times.
On my original tuning date (mild temp) the car would boost just under 10psi.
Then it got cold, and I was over boosting and hitting my 11psi fuel cut.
Now, its warmed up and I'm only making 8 psi of boost.
This is the EXACT reason I switched over to closed loop control, so temp wouldn't be a factor. Has anyone else noticed this? At this point I think I'm going to go back to open loop control and not even mess with the closed loop. At least with open loop I'll know exactly what it is doing at all times.
Can anyone explain this? I'm running the UTEC in closed loop. Isn't closed loop supposed to prevent this from happening???
I'm running a gain of 80 (to prevent any spikes). I was under the impression in closed loop there wouldn't be any boost creep???? I'm confused now.
Originally Posted by KPierson
I don't think its the solenoid that is going to determine the max boost the sytem can hold. The wastegate springs will make this determination.
You 'should' be able to. I believe you can typically double your spring pressure with the boost controller.
I went to the track last night and it actually held boost fairly well. Not perfect, but fairly well. I was within .5PSI or so throughout the run. I've been talking to TurboXS and they want to swap my unit out and see if that fixes any of my problems.
I went to the track last night and it actually held boost fairly well. Not perfect, but fairly well. I was within .5PSI or so throughout the run. I've been talking to TurboXS and they want to swap my unit out and see if that fixes any of my problems.
Originally Posted by KPierson
You 'should' be able to. I believe you can typically double your spring pressure with the boost controller.
I went to the track last night and it actually held boost fairly well. Not perfect, but fairly well. I was within .5PSI or so throughout the run. I've been talking to TurboXS and they want to swap my unit out and see if that fixes any of my problems.
I went to the track last night and it actually held boost fairly well. Not perfect, but fairly well. I was within .5PSI or so throughout the run. I've been talking to TurboXS and they want to swap my unit out and see if that fixes any of my problems.
As of yesterday I am no longer running in closed loop mode with my UTEC. It just wasn't able to stop boost spikes when I went from partial throttle to full throttle.
From a stop, I had no spikes at all, but if I was at 3500RPM and floored it it would hit boost cut almost everytime. My boost cut was about 3psi higher then my boost target.
Here is what I found - the 'boost gain' that is adjustable from 0 - 100 has absolutely NO effect on boost gain. From what I've seen with the UTEC I am assuming that this is a bug and something they probably never tested. I had the exact same boost response with that programmed to 0 as I did with it at 100. The 'stock' setting may be OK for people running low boost with a certain solenoid, but for high boost control with my dual solenoid setup it just isn't fast enough to react.
In open loop mode my boost is spot on all the way to redline. So, until the next firmware upgrade I guess I'm stuck in open loop mode - which really sucks because the weather changes around here every day.
From a stop, I had no spikes at all, but if I was at 3500RPM and floored it it would hit boost cut almost everytime. My boost cut was about 3psi higher then my boost target.
Here is what I found - the 'boost gain' that is adjustable from 0 - 100 has absolutely NO effect on boost gain. From what I've seen with the UTEC I am assuming that this is a bug and something they probably never tested. I had the exact same boost response with that programmed to 0 as I did with it at 100. The 'stock' setting may be OK for people running low boost with a certain solenoid, but for high boost control with my dual solenoid setup it just isn't fast enough to react.
In open loop mode my boost is spot on all the way to redline. So, until the next firmware upgrade I guess I'm stuck in open loop mode - which really sucks because the weather changes around here every day.