iHateVolvoPeople
Active member
- Joined
- Feb 1, 2014
- Location
- Midwest
93 244+T, LH2.4, 2.5" straightpipe, iPd turbo cam, m47
I've noticed that with my 13c, especially in the colder weather, the boost creep is terrible. I can feel the wastegate open at the desired 7psi but if I lay on it and wrap out a gear it will spike to 10-11psi.
I have my MBC set to about 10 psi and it creeped to almost 15psi as I approached 5k so I had to feather the throttle to avoid knock.
My 'theory' behind this is that the wastegate hole is much too small to evacuate sufficient exhaust gasses to regulate boost levels. I haven't taken measurements, but the puck is of adequate size. Underneath the puck, however, is MUCH smaller than the puck. I'm assuming if I were to port this hole to be a similar size to that of a 15g, the creep would go away. I had no spike on my 15g.
Anyone else experience this?
I've noticed that with my 13c, especially in the colder weather, the boost creep is terrible. I can feel the wastegate open at the desired 7psi but if I lay on it and wrap out a gear it will spike to 10-11psi.
I have my MBC set to about 10 psi and it creeped to almost 15psi as I approached 5k so I had to feather the throttle to avoid knock.
My 'theory' behind this is that the wastegate hole is much too small to evacuate sufficient exhaust gasses to regulate boost levels. I haven't taken measurements, but the puck is of adequate size. Underneath the puck, however, is MUCH smaller than the puck. I'm assuming if I were to port this hole to be a similar size to that of a 15g, the creep would go away. I had no spike on my 15g.
Anyone else experience this?