Dear
I've a problem with exhaust on my Z4 35i N54, related to the exhaust flap on the original right silencer
Two questions:
1) the tube that opens the exhaust valve, work's with vacuum? If so, where does this vacuum from the engine ?
2) with original map, the valve at the exhaust opening when the engine was cold and it was started, valve stay open for a few seconds and then closed, then with the setting SPORT or SPORT + it opened when kick down the gas.
Now after I mapped (387hp) the behavior of the valve at the exhaust has changed, at the start it behaves as before, but going into SPORT or SPORT + the valve opens in release, not in kick down. What may have happened ? is there a parameter in mapping to be fixed?
Thank's
I've a problem with exhaust on my Z4 35i N54, related to the exhaust flap on the original right silencer
Two questions:
1) the tube that opens the exhaust valve, work's with vacuum? If so, where does this vacuum from the engine ?
2) with original map, the valve at the exhaust opening when the engine was cold and it was started, valve stay open for a few seconds and then closed, then with the setting SPORT or SPORT + it opened when kick down the gas.
Now after I mapped (387hp) the behavior of the valve at the exhaust has changed, at the start it behaves as before, but going into SPORT or SPORT + the valve opens in release, not in kick down. What may have happened ? is there a parameter in mapping to be fixed?
Thank's
