Matt, if you turn them both one, only one will work at any given time.

LC is when you are stationary, as Gareth says with your foot on the gas and clutch, then when you drop the clutch and go, the next time you lift off the throttle to change gear or coast the ALS will operate to keep the turbo spinning.

so, with your LC do you have to engage it by pressing a button then put your foot on the gas, and release the button once you are moving?

and yes, LC will pop and bang and clatter when in use.

so will ALS LOL