Originally Posted by
GMPX
The MAP Zones should be something that you alter (if at all) before you begin tuning the VVE table because it makes a major difference to the calculations.
I don't know what method GM use to determine what they need, but basically the wider the area you can define the better. So if you need to tune up to 200kPa then best to spread out the zones to give better coverage (look at the MAP zones on GM's boosted applications). In doing this it will allow EFILive to calculate the VVE better for each zone rather than being constrained by GM's compacted zones.
Look at a stock Vette -
RPM Boundaries MAP 1 MAP 2 MAP 3 MAP 4 MAP 5
RPM Section 1 _30____45____60____75____90
RPM Section 2 _25____45____60____75____90
RPM Section 3 _21____45____60____75____90
RPM Section 4 _21____45____60____75____90
RPM Section 5 _21____45____60____75____90
Assume the engine has a decent size cam, MAP1 is a total waste as you have assigned the entire column to kPa values between 21 and 30. The effect that has is you end up with a bunch of cells in the VVE table that are worthless for tuning.
Something like shown below would give you more control over the area's the cam engine will be running in. As you now have the zones 10kPa apart in the area that will need tuning.
RPM Boundaries MAP 1 MAP 2 MAP 3 MAP 4 MAP 5
RPM Section 1 _35____50____60____75____90
RPM Section 2 _40____55____70____80____90
RPM Section 3 _40____55____70____80____90
RPM Section 4 _40____55____70____80____90
RPM Section 5 _40____55____70____80____90
But as I said above, once you change these zones (and the RPM Zones) the entire VVE will need to be retuned, in fact, it will probably make a total mess of it.
Cheers,
Ross