I only adjust VE1, even on a stock .bin file that will be using both VE1 and VE2.

For VE cells over 100, I adjust to 96 and increase the BPW slightly ( usually 3 or less).

I'll add VE1 + VE2 for modified engines (cams, heads, pistons, intakes, ect). For a stock or nearly stock engine, adjustments to BPW and VE1 are all that is usually required.

dave w