Starting question

[SharkPilot]

There's nothing wrong I'm just curious about how this car starts up.

Most of the time it cranks about two seconds before it lights off and is running. There are other times, usually when it's hot, that it will crank just a bit longer. Then there are times that it cranks and starts almost immediately. Recently it sat in the garage for a week while I replaced half-shaft u-joints. When I started it for the first time it fired almost immediately, less than one second of cranking. That's not the only time it has started that quickly either.

I have read that the DIS ignition needs to get all of its ducks lined up before it will start firing sparks. I'm just curious about how variable it seems to be. The car has a Rippie chip and runs perfectly so this is more curiosity than anything else. It does always start so that's a great thing. It's driven nearly every day so lack of use isn't a factor. I also use Chevron fuel all of the time so it's not a question of different fuels.

Does anyone have any ideas why the cranking time can vary?