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I fitted my Forge MBC at the weekend, in line between the wastegate and the APC solenoid. Being careful, I started with just half a turn from closed, so I was surprised that I got a fair bit of pinking under load. So I closed it up to just a quarter turn, and I still got some pinking, with the APC backing off the boost. (At a 1/4 turn open, I could barely blow through the MBC, BTW).
Any thoughts as to why this is? It's not like I'm tripping the overboost, it just seems that the fuel system can't deliver enough petrol to cope with even a slight increase in airflow. Is the system really that marginal?
Anyone have any thoughts on this? Could the ignition timing or advance somehow be 'out'? Anything else I haven't thought of?
TIA,
Alan
Any thoughts as to why this is? It's not like I'm tripping the overboost, it just seems that the fuel system can't deliver enough petrol to cope with even a slight increase in airflow. Is the system really that marginal?
Anyone have any thoughts on this? Could the ignition timing or advance somehow be 'out'? Anything else I haven't thought of?
TIA,
Alan