Cvt Overshooting boost targets 26psi

Dwight

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So I was going through my data logs when I noticed I hit 26psi for a brief moment on 21psi ktuner map and not just once but multiple times this has been happening according to the datalogs like wtf I'll blow that shit up if it kept doing that right? Also I already talk to one of my mechanic friend and he said it could be the electronic wastegate actuator ....has anyone experience this ? Or can anyone tell what's causing the overshooting?
Oh by the way it happens mostly when I'm wot from a dead stop, it does happen when I floor from around 50km but not as often on like it does ondead stop
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Be prepared to buy a new motor if it blows. I'd change tunes ASAP before it happens.
 

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Please clarify which area you are seeing 26psi (MAP or TCP)?
Did you change your EWG to an after market?
It would appear that perhaps your EWG isn't able to keep up with the boost target and is spiking. Even with the Civic(s), you shouldn't be spiking any more than maybe 1psi at any given time.

Also:
For your Location, don't list "USA" if you are talking about KM - you should know Americans do not use KM, we use MPH.
 
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Isn't it just a split second overshoot right when you let off the throttle? I spiked to 26.2 psi on the TSP 1 once. Of course that's more like a 23-24 psi tune, not 21.

Btw, .zip your datalog here and I'll take a look.
 
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Isn't it just a split second overshoot right when you let off the throttle? I spiked to 26.2 psi on the TSP 1 once. Of course that's more like a 23-24 psi tune, not 21.

Btw, .zip your datalog here and I'll take a look.
Yep. I had this same question. Derek told me that during simulated “shifts” it will overshoot occasionally.
 


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Probably more so when the Ramp Rate is set to its most Aggressive.
 
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Please clarify which area you are seeing 26psi (MAP or TCP)?
Did you change your EWG to an after market?
It would appear that perhaps your EWG isn't able to keep up with the boost target and is spiking. Even with the Civic(s), you shouldn't be spiking any more than maybe 1psi at any given time.

Also:
For your Location, don't list "USA" if you are talking about KM - you should know Americans do not use KM, we use MPH.
Hey your right according to ktuner my electronic wastegate is the problem, do u know how I fix that?
 
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Dwight

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Isn't it just a split second overshoot right when you let off the throttle? I spiked to 26.2 psi on the TSP 1 once. Of course that's more like a 23-24 psi tune, not 21.

Btw, .zip your datalog here and I'll take a look.
Yes it's a split second but when it hit the 26psi it's not correcting it to 21psi or the psi I should be making its correcting it way below 21psi or whatever psi it should have been able to make....for example If I flash 21psi and it spike to 24psi the ewg is lowering the psi to around 17psi and not 21psi I will upload a data log as soon the weather get better
 
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Dwight

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Probably more so when the Ramp Rate is set to its most Aggressive.
Yes I have everything set to aggressive but it still shouldn't be doing that
 


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Dwight

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Please clarify which area you are seeing 26psi (MAP or TCP)?
Did you change your EWG to an after market?
It would appear that perhaps your EWG isn't able to keep up with the boost target and is spiking. Even with the Civic(s), you shouldn't be spiking any more than maybe 1psi at any given time.

Also:
For your Location, don't list "USA" if you are talking about KM - you should know Americans do not use KM, we use MPH.
Map
 

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Yes it's a split second but when it hit the 26psi it's not correcting it to 21psi or the psi I should be making its correcting it way below 21psi or whatever psi it should have been able to make....for example If I flash 21psi and it spike to 24psi the ewg is lowering the psi to around 17psi and not 21psi I will upload a data log as soon the weather get better
Your spike is only for a brief moment .2-.3s tops. You are requesting increased spool & ramp right? So, how do you achieve that - well, by getting that sucker to spin by increasing exhaust gases.
Now, you are seeing 17psi or so, but I assure you that your compressor is targeting 21psi - what you are not seeing is the pressure loss from Atmospheric to Compressor to Flow into Manifold. There is a principle: Bernoulli’s Principle (look it up).

Monitor your STFT & LTFT and Knock Control - those will offer you a better indication of what’s happening under the hood.

Doesn’t appear that you are “Surging”, so I would assume you’re A-Ok.
 
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Dwight

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Your spike is only for a brief moment .2-.3s tops. You are requesting increased spool & ramp right? So, how do you achieve that - well, by getting that sucker to spin by increasing exhaust gases.
Now, you are seeing 17psi or so, but I assure you that your compressor is targeting 21psi - what you are not seeing is the pressure loss from Atmospheric to Compressor to Flow into Manifold. There is a principle: Bernoulli’s Principle (look it up).

Monitor your STFT & LTFT and Knock Control - those will offer you a better indication of what’s happening under the hood.

Doesn’t appear that you are “Surging”, so I would assume you’re A-Ok.
I'll send you a data log
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