Engine displacement type

Definition:

Platform:

Min Value:

Max Value:

Description:
Defines the cubic inch displacement of the engine. Increasing the engine size lowers the calculated engine load value. Engine Displacement, MAF Transfer, and Injector Size are all used by the EEC to calculate engine load.

Hints:
Engine Displacement Defines the cubic inch displacement of the engine. This parameter is important because is defines how load is calculated. The VE(Load) is calculated by the airflow, the RPM and the Engine Displacement. Engine_displacement/(Airflow/RPM) = VE(load) Increasing Engine Displacement typically causes increased ignition advance and leaner mixtures. This parameter is closely coupled with the Maf Transfer Function. Double this value, and you halve the calculated load value—that means leaner fuel mixtures and more timing. Be careful here!.

Most aftermarket or chip burners simply scale this to match you're engine. For example if you have a blown car, you could lower the displacement which puts you in a lower load table at idle up. A better more accurate way of doing this is to use the function Sealevel load scaling vs RPM and input the proper displacement here.