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Author Topic: help me with this boost problem  (Read 1611 times)
nyet
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« Reply #15 on: January 11, 2018, 12:36:58 PM »

at a simple 5% throttle pedal push the boost increase very fast and very much and will broken the engine because the ecu not have time to cut the boost
That is completely false, it will absolutely not break YOUR engine on spool, it is IDENTICAL to having the n75 connected. During spool the n75 is at 95%
your peak boost will not be that big .. because after peak boost 95% dc is actually underboosting on your car.

unless it is your N75 that is bad. The only way to know is to run a quick pull with wg disconnected, or replace the N75, or run various fixed wgdc outputs as a test.

Quote
n75 at 95% it is inverse like wg disconnected.

sigh.

Quote
when n75 95% the preasure push the wg and the turbo deacrease preassure in inleat manihold.

no

when n75 is 0% pressure pushes the wg open. at 95% the n75 vents pressure AWAY from the WG.
« Last Edit: January 11, 2018, 12:40:13 PM by nyet » Logged

ME7.1 tuning guide (READ FIRST)
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nyet
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« Reply #16 on: January 11, 2018, 12:42:39 PM »

As to your log: There is a cliff like drop off on your req boost that is causing the PID to be unstable; it is causing that oscillation.

Please review PIDs and how large changes in set point can cause problems.
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ME7.1 tuning guide (READ FIRST)
ECUx Plot
ME7Sum checksum checker/corrrector for ME7.x

Please do not ask me for tunes. I'm here to help people make their own.

Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your experience.
nyet
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« Reply #17 on: January 11, 2018, 12:57:42 PM »

Finally, use ECUxPlot and look at your injector DC.

Compare that to how far off your actual boost is from req at redline.

If you ever manage to make req boost, you will definitely be out of injector.
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ME7.1 tuning guide (READ FIRST)
ECUx Plot
ME7Sum checksum checker/corrrector for ME7.x

Please do not ask me for tunes. I'm here to help people make their own.

Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your experience.
tao13
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« Reply #18 on: January 12, 2018, 12:26:10 AM »

THANKS
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