IX top end boost with O2, WGA tightened
There have been quite a few pictures of the junction area where the turbine and wastegate gases meet back up. The wastegate openings are not uniform. Some are large and others have a tiny opening.
Others have experienced boost creep on those with the tiny opening and have rectified their creep by porting out a larger hole.
Others have experienced boost creep on those with the tiny opening and have rectified their creep by porting out a larger hole.
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Joined: May 2006
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From: UK
Ralph, no 234 load at 7000 at 250kPa MAP, but you can get nearly the same load at only 240kPa MAP so I run that.
Boost creep is now as before the turbo elbow - ie 230kPa at 6000 RPM approx.
Present V-power is 270kPa to 6000 (with peak up to 275-280kPa), dropping thereafter.
It isn't efficient on airflow or timing chasing boost at 7000 RPM.
On warm days with more than 270kPa midrange it needs too much timing removed on V-power, but behaves up to that level.
Boost creep is now as before the turbo elbow - ie 230kPa at 6000 RPM approx.
Present V-power is 270kPa to 6000 (with peak up to 275-280kPa), dropping thereafter.
It isn't efficient on airflow or timing chasing boost at 7000 RPM.
On warm days with more than 270kPa midrange it needs too much timing removed on V-power, but behaves up to that level.
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