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Message: <blockquote data-quote="EG9" data-source="post: 2370263" data-attributes="member: 396">facing some problem with engine pigging. The problem will be high compression ratio on that engine. I think I'm running more then 13:1 CR which is very high. In order to solve the problem 1st try to increase max fuel pressure to 40psi, it's really help and engine pigging do reduce but it's still there in some certiam RPM. Secondly, remap my ignition mapping to much lower ignition timing and increase the AFR by 8% in my Freedom ECU. Overall it run much smoother but the pigging is still there especialy on 5th gear and excelerate from 2K RPM to 3K RPM. After a 360Km of running in, I try to remap the whole ignition map on the Freedom again. This time, the pigging is almost dissapear but due to lower ignition timing the car seem to respond a bit slower and lack of abit of torque compared to previously. How good if we got high octane fuel. I can run higher ignition timing without worry on engine pigging. anyway up to date, I haven't rev the engine pass 4k RPM.</blockquote>

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