Turbo Smurfette - Build in progress (slow)
08-22-2017, 06:26 PM
#1043
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Dunno. My boost control sux right now. I'm having trouble getting a good balance. If I tune it for a pull starting in 4th at like 2500rpm and get a good curve, it overboosts really hard on quick throttle application. And if I tune it for quick throttle it overboosts when doing a long pull. So I've got some work to do still. Havent had a lot of time/motivation.
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08-22-2017, 06:59 PM
#1048
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If lower is better, there's a 20Hz and 15Hz options under High Frequency Range
19.5Hz and 15.6Hz under Low Frequency Range
Any rhyme or reason to such close operating frequencies under two different advertised ranges?
19.5Hz and 15.6Hz under Low Frequency Range
Any rhyme or reason to such close operating frequencies under two different advertised ranges?
Last edited by psyber_0ptix; 08-22-2017 at 07:47 PM.
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08-22-2017, 11:34 PM
#1051
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Before this all started, it was only showing a thread. I'll back it back out tomorrow, but am still stumped on the oscillating.
Would it make any sense to pull the line off the wastegate to see if it flutters without the EBC?
Last edited by psyber_0ptix; 08-23-2017 at 09:01 AM.
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08-23-2017, 02:02 PM
#1052
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I would suspect its because open loop boost control.
Being that you have your open loop table pretty close, going to closed loop should remedy your problems. That said, I don't have experience with MS boost control and how it references different tables. That's the whole purpose of going closed loop though (to remove oscillations and change in boost levels from environmental fluctuations and change in load)
Spend some time and go closed loop.
Being that you have your open loop table pretty close, going to closed loop should remedy your problems. That said, I don't have experience with MS boost control and how it references different tables. That's the whole purpose of going closed loop though (to remove oscillations and change in boost levels from environmental fluctuations and change in load)
Spend some time and go closed loop.
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08-23-2017, 02:20 PM
#1053
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Closed loop is to handle changing environments. You should be able to get stable boost control with open loop at a specific temperature, etc. If you have unstable boost control its going to be hard for closed loop to fix that, it will constantly be fighting itself.
We need logs. Post them plz.
We need logs. Post them plz.
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08-23-2017, 02:43 PM
#1054
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Closed loop is to handle changing environments. You should be able to get stable boost control with open loop at a specific temperature, etc. If you have unstable boost control its going to be hard for closed loop to fix that, it will constantly be fighting itself.
We need logs. Post them plz.
We need logs. Post them plz.
Here are some. Sometimes D.C. area is not conducive to lengthy stretches of clear road. Or speed cameras, or belt way cameras, or EZPass, or State Troopers, or gradual right mini vans.
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08-23-2017, 02:55 PM
#1056
I would suspect its because open loop boost control.
Being that you have your open loop table pretty close, going to closed loop should remedy your problems. That said, I don't have experience with MS boost control and how it references different tables. That's the whole purpose of going closed loop though (to remove oscillations and change in boost levels from environmental fluctuations and change in load)
Spend some time and go closed loop.
Being that you have your open loop table pretty close, going to closed loop should remedy your problems. That said, I don't have experience with MS boost control and how it references different tables. That's the whole purpose of going closed loop though (to remove oscillations and change in boost levels from environmental fluctuations and change in load)
Spend some time and go closed loop.
I suggest that you provide input/suggestions from experience rather than just random guesses (no offense, but we're actually trying to diagnose an issue here)
Closed loop is to handle changing environments. You should be able to get stable boost control with open loop at a specific temperature, etc. If you have unstable boost control its going to be hard for closed loop to fix that, it will constantly be fighting itself.
We need logs. Post them plz.
We need logs. Post them plz.
He hits his target boost numbers, and he even holds them til redline.
There's just that jitteriness up top that we're trying to diagnose here. Pre-load seems to be ruled out.
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08-23-2017, 03:46 PM
#1057
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Should that e85 table have 85/100% duty cycle that high in the last two columns? I think that was last ditch efforts at PTuning to get it to peak over 28psi, but it never did. Should that be reduced or tapered otherwise?
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