Quote:
Originally Posted by RarlyL8
Not sure what a step up pump system is.
The volume of air follows the throttle and does not change significantly until on boost. You tune on 4 planes and all is fine. The early Euro system has no Lambda so idle CO% is set manually. I have seen no significant tuning changes until on boost with the big power engines. With those the extra fuel head flow and control pressures need mesh up.
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I have a euro CIS fuel injection system and understand it is desirable due to much larger fuel lines etc. If upgrading my turbo would any tuning be required to my fuel system or will the CIS compensate?