How does your exhaust valve work.
11-21-2015, 04:03 PM
#1
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How does your exhaust valve work.
I noticed when you put on sport mode the valve seems to open up earlier that when not in sport mode.
Today we went on a VERY spirited drive to an event and about 1/2 way there I noticed the valve was staying open all the time. When I left the event after a few hours the valve was closed and it is not in sport mode when you first start it. I put it in sport mode and the valve opened right away at idle. The drive home was not as spirited and the more I drove it seemed to go back to normal where it opens at about 3000 rpm's. It almost seemed the the computer made it more aggressive the more aggressive I drove the car and when driving normal it goes back to opening up later in the rpm range.
Is this normal or am I going crazy?
P.S. It is a 2011 stock GT3.
Today we went on a VERY spirited drive to an event and about 1/2 way there I noticed the valve was staying open all the time. When I left the event after a few hours the valve was closed and it is not in sport mode when you first start it. I put it in sport mode and the valve opened right away at idle. The drive home was not as spirited and the more I drove it seemed to go back to normal where it opens at about 3000 rpm's. It almost seemed the the computer made it more aggressive the more aggressive I drove the car and when driving normal it goes back to opening up later in the rpm range.
Is this normal or am I going crazy?
P.S. It is a 2011 stock GT3.
11-21-2015, 09:11 PM
#2
I noticed when you put on sport mode the valve seems to open up earlier that when not in sport mode.
Today we went on a VERY spirited drive to an event and about 1/2 way there I noticed the valve was staying open all the time. When I left the event after a few hours the valve was closed and it is not in sport mode when you first start it. I put it in sport mode and the valve opened right away at idle. The drive home was not as spirited and the more I drove it seemed to go back to normal where it opens at about 3000 rpm's. It almost seemed the the computer made it more aggressive the more aggressive I drove the car and when driving normal it goes back to opening up later in the rpm range.
Is this normal or am I going crazy?
P.S. It is a 2011 stock GT3.
Today we went on a VERY spirited drive to an event and about 1/2 way there I noticed the valve was staying open all the time. When I left the event after a few hours the valve was closed and it is not in sport mode when you first start it. I put it in sport mode and the valve opened right away at idle. The drive home was not as spirited and the more I drove it seemed to go back to normal where it opens at about 3000 rpm's. It almost seemed the the computer made it more aggressive the more aggressive I drove the car and when driving normal it goes back to opening up later in the rpm range.
Is this normal or am I going crazy?
P.S. It is a 2011 stock GT3.
I talk about some of this, and have a little video clip of the valves actuating, in a post on the topic here:
https://rennlist.com/forums/997-gt2-...l#post12698789
Pretty clever setup really.
11-22-2015, 12:38 PM
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My valve does not usually open up at idle other than the other day when I was driving it aggressively. Once I stated driving normal again it want back to not opening at idle.
11-22-2015, 04:10 PM
#5
^ this is true... It is easily noticeable when its working right. You can see the magic happening in the video (from the post I reference). If your car is not getting louder (in SPORT mode) at idle I suspect your actuators may be 'sticking'. Technically they are open when its louder which means they are not under vacuum. So it's not a lack of vacuum that would cause that. Or your solenoid could be going bad.