I’ve done this once a long time ago with a cigarette and personally I’m not keen on the method. This is likely because I’m a non-smoker and don’t like the lingering taste of smoke in my mouth for several days afterwards.
Questions. I can see blowing smoke into the intake. How do you pressure the intake up because this would mean that all intake valves would have to be closed, valve overlap is zero or less, etc.?
What about vacuum leaks inside the car (depending) or in lines running back inside the fenders or to the rear of the car, etc.?
Ever considered buying a fog machine like DJs and bands use on stage? A little adapting to fit a vacuum line and you can generate enough smoke to obscure the entire 'hood.
These can be had cheap and the chemical (called fog juice) is inexpensive also
I bought one for 20 bucks and this is just food for thought.
Guitar and spandex pants would be optional. 