and if youre running alky you may want to wire in a relay normally closed to open while 2 step is activated so youre not spraying when the boost rises past your alky turn on point.
Help me out and let me jump in on this for a second.
Why do we want to totally deactivate alky when in 2-step?
So let me get this strait................
When not in 2-step, you are building boost normally on all 6 cylinders. So the actual AF is a reflection of the combined combustion of fuel and alky. Now, assuming the tune is good in the "boost building" areas of the VE map, there should be little to no correction to the fuel. Right?
Now in a launch situation, we activate the 2-step. Cylinders will randomly be cut. Raw fuel, alky, and uncombined oxygen will be spilling into the exhaust stream messing up all the AF readings. But now we also deactivate correction in these same "boost building" VE cells. So, in theory, the cylinders that fire are still getting exactly what they need as far as fuel and alky. Right?
So why take alky out of the mix? If the XFI is using only it's VE number to fuel the motor, and this number represents the presumed presents of alky, wouldn't it be going lean during 2-step?