HKS EVC 6 wastegate flutter
Aug 30, 2010, 04:32 PM
#1
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HKS EVC 6 wastegate flutter
Hi,
I have an australian delivered Evo IX with TBE + HFC, intercooler piping and a suction kit. Ive also been tuning it with ecuflash
I recently had an HKS EVC 6 installed by a professional, the initial setup is as follows;
Unit: Psi
Exhaust bypass: Swing Type value
Stock turbo pressure: 11.6 psi (stock actuator 0.8 bar)
Normal boost: 18 psi
Boost correlation: 100%
When i boost in higher gears (3+), i can hear and feel the wastegate fluttering open and closed. I tried upping the stock turbo pressure to 12, 13 and 14 psi but it still happens.
I turned the SAP (sensitivity) down to 2 and that seemed to make it a little better, but this is not an ideal situation as it increases my boost spike coming onto initial boost.
Does anyone know how i can fix this? I did a search and some people report that turning your stock turbo pressure up will fix it but it didn't in my case.
I have an australian delivered Evo IX with TBE + HFC, intercooler piping and a suction kit. Ive also been tuning it with ecuflash
I recently had an HKS EVC 6 installed by a professional, the initial setup is as follows;
Unit: Psi
Exhaust bypass: Swing Type value
Stock turbo pressure: 11.6 psi (stock actuator 0.8 bar)
Normal boost: 18 psi
Boost correlation: 100%
When i boost in higher gears (3+), i can hear and feel the wastegate fluttering open and closed. I tried upping the stock turbo pressure to 12, 13 and 14 psi but it still happens.
I turned the SAP (sensitivity) down to 2 and that seemed to make it a little better, but this is not an ideal situation as it increases my boost spike coming onto initial boost.
Does anyone know how i can fix this? I did a search and some people report that turning your stock turbo pressure up will fix it but it didn't in my case.
Aug 30, 2010, 05:22 PM
#2
Hi,
I have an australian delivered Evo IX with TBE + HFC, intercooler piping and a suction kit. Ive also been tuning it with ecuflash
I recently had an HKS EVC 6 installed by a professional, the initial setup is as follows;
Unit: Psi
Exhaust bypass: Swing Type value
Stock turbo pressure: 11.6 psi (stock actuator 0.8 bar)
Normal boost: 18 psi
Boost correlation: 100%
When i boost in higher gears (3+), i can hear and feel the wastegate fluttering open and closed. I tried upping the stock turbo pressure to 12, 13 and 14 psi but it still happens.
I turned the SAP (sensitivity) down to 2 and that seemed to make it a little better, but this is not an ideal situation as it increases my boost spike coming onto initial boost.
Does anyone know how i can fix this? I did a search and some people report that turning your stock turbo pressure up will fix it but it didn't in my case.
I have an australian delivered Evo IX with TBE + HFC, intercooler piping and a suction kit. Ive also been tuning it with ecuflash
I recently had an HKS EVC 6 installed by a professional, the initial setup is as follows;
Unit: Psi
Exhaust bypass: Swing Type value
Stock turbo pressure: 11.6 psi (stock actuator 0.8 bar)
Normal boost: 18 psi
Boost correlation: 100%
When i boost in higher gears (3+), i can hear and feel the wastegate fluttering open and closed. I tried upping the stock turbo pressure to 12, 13 and 14 psi but it still happens.
I turned the SAP (sensitivity) down to 2 and that seemed to make it a little better, but this is not an ideal situation as it increases my boost spike coming onto initial boost.
Does anyone know how i can fix this? I did a search and some people report that turning your stock turbo pressure up will fix it but it didn't in my case.
-Put the SAP back.
-Turn on Function 3
-Set your 5 RPM points (equally spaced at 300-400 rpm's apart), starting with the highest RPM, and working backwards.
-set the WG duty cyle for the RPM points, again working backwards.
-(100=1st RPM point 190=5th RPM point)
-1st RPM point should start right before it starts to flutter.
GL HF
Aug 30, 2010, 10:28 PM
#3
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Im not sure how you would set the WG duty cycle? I can use the boost correction map to set correction boost, is this the same thing?
If it starts happening at about 2300 rpms, i should have the first rpm point at 2200, then 2500, 2800..etc?
Also, what values should i use for the WG duty cycle?
If it starts happening at about 2300 rpms, i should have the first rpm point at 2200, then 2500, 2800..etc?
Also, what values should i use for the WG duty cycle?
Aug 31, 2010, 08:47 AM
#4
Im not sure how you would set the WG duty cycle? I can use the boost correction map to set correction boost, is this the same thing?
If it starts happening at about 2300 rpms, i should have the first rpm point at 2200, then 2500, 2800..etc?
Also, what values should i use for the WG duty cycle?
If it starts happening at about 2300 rpms, i should have the first rpm point at 2200, then 2500, 2800..etc?
Also, what values should i use for the WG duty cycle?
Aug 31, 2010, 07:10 PM
#5
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It doesnt happen in lower gears, just if I floor it at 2k in 5th.
In earlier gears you can hear it higher up a little.
What actuator pressure did you set it at? Its worse at 11 psi and a little better at 12 psi
In earlier gears you can hear it higher up a little.
What actuator pressure did you set it at? Its worse at 11 psi and a little better at 12 psi
Aug 31, 2010, 07:24 PM
#6
OK try to set the actuator psi at 12.8-13.2 psi, I believe that is what I had it at when I was stock WG.
Any reason why you are only running 18 psi?
Aug 31, 2010, 09:46 PM
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18 psi because thats just normal driving around, don't need too much power in traffic, the other is 22.
I noticed it when i just came on boost in 5th, didn't need to floor it, I was next to a wall driving along and I could hear it really loudly. Its really noticeable if you floor it in 5th though.
Ill put the actuator psi at 12.8 next time I get the chance.
I noticed it when i just came on boost in 5th, didn't need to floor it, I was next to a wall driving along and I could hear it really loudly. Its really noticeable if you floor it in 5th though.
Ill put the actuator psi at 12.8 next time I get the chance.
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Aug 31, 2010, 10:25 PM
#8
18 psi because thats just normal driving around, don't need too much power in traffic, the other is 22.
I noticed it when i just came on boost in 5th, didn't need to floor it, I was next to a wall driving along and I could hear it really loudly. Its really noticeable if you floor it in 5th though.
Ill put the actuator psi at 12.8 next time I get the chance.
I noticed it when i just came on boost in 5th, didn't need to floor it, I was next to a wall driving along and I could hear it really loudly. Its really noticeable if you floor it in 5th though.
Ill put the actuator psi at 12.8 next time I get the chance.
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