Open Waste gate “Flutter” - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Kris86 · 05-12-2019, 07:16 PM

is There anyway for me to prevent this? I notice some cars make the noise and others don’t, is there any reason behind it?

DarkPira7e · 05-12-2019, 08:24 PM

WHat are you using for a boost controller? Also, what size wastegate? The wastegate may be too big from my research. I came to know this as wastegate surge in my WRX.

Kris86 · 05-13-2019, 08:18 AM

Quote:

Originally Posted by DarkPira7e

WHat are you using for a boost controller? Also, what size wastegate? The wastegate may be too big from my research. I came to know this as wastegate surge in my WRX.

I using a three port electronic boost solenoid plugged into the EVAP connection controlled through Ecutek.

The waste gate is a Tial 38mm open dump

Fred E · 05-13-2019, 09:56 AM

There's a setting in Ecutek for wastegate frequency. A higher frequency will modulate the wastegate faster so it sounds like BWAAAAA while a lower frequency will modulate the wastegate slower so it sounds like BWA-BWA-BWA-BWA. Hope that makes sense!

There's a section in the Ecutek tuning help PDF for this platform that has more information on it in the Boost Control section. The suggested frequency in there is between 20 and 30, which corresponds to a BWAAAAA sound.

05-12-2019, 07:16 PM	#1
Kris86 Senior Member Join Date: Feb 2013 Drives: RHD Gt86 Location: Antigua, west indies Posts: 369 Thanks: 619 Thanked 102 Times in 75 Posts Mentioned: 6 Post(s) Tagged: 0 Thread(s)	Open Waste gate “Flutter” is There anyway for me to prevent this? I notice some cars make the noise and others don’t, is there any reason behind it? __________________ Toyota - Making Dreams A Reality 461hp on 91octane - JDL turbo GTX3076r GEN 2 - Mazworx CD009 transmission

05-13-2019, 09:56 AM	#4
Fred E Senior Member Join Date: Dec 2013 Drives: WRB BRZ Location: New Jersey Posts: 261 Thanks: 83 Thanked 150 Times in 96 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	There's a setting in Ecutek for wastegate frequency. A higher frequency will modulate the wastegate faster so it sounds like BWAAAAA while a lower frequency will modulate the wastegate slower so it sounds like BWA-BWA-BWA-BWA. Hope that makes sense! There's a section in the Ecutek tuning help PDF for this platform that has more information on it in the Boost Control section. The suggested frequency in there is between 20 and 30, which corresponds to a BWAAAAA sound. Last edited by Fred E; 05-14-2019 at 09:26 AM.

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05-12-2019, 08:24 PM	#2
DarkPira7e Rust bucket enthusiast Join Date: Feb 2017 Drives: 2013 Turbo Firestorm FRS Location: Vermont Posts: 4,024 Thanks: 3,289 Thanked 4,177 Times in 2,098 Posts Mentioned: 33 Post(s) Tagged: 0 Thread(s)	WHat are you using for a boost controller? Also, what size wastegate? The wastegate may be too big from my research. I came to know this as wastegate surge in my WRX.

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