2019 Honda civic si coupe questions

[XProjectWaffleX]

Okay so here's my dumb question list

I have a 2019 honda civic si coupe 1.5L turbo
What exactly does sport mode do other than add more boost and adjust fuel levels? I know its kind of like an on the fly tune from factory but what's up with the suspension? when you press the button the picture shown on dash highlights the engine and suspension.
What is the name of this engine?
How much boost can the engine take on stock internals?
To what psi can I turn up the stock turbo before I see issues?
I'm going to get these wheels in 18"X8.5" https://www.workwheelsusa.com/product/emotion-d9r/
Street Tire recommendations for these wheels?
Are fully built crate motors available?
If not is there anywhere you guys know of where I can source a stock engine to build outside the car then just drop in when its finished?
Is there a way for me to bypass the parking brake and install an E brake of sorts i.e. hydro or mechanical?
(specifically want to know that one so I can be a hooligan when the roads are wet)
How much torque can the stock axles handle before I have to upgrade?
Coilover recommendations? Should I even get them?

I'm expecting positive and negative feedback on every question lol so let me have it ;-)

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[Drake]

Sport mode does 3 things from the factory:
1.) Stiffen suspension
2.) Add steering weight
3.) Increase throttle response

 

[XProjectWaffleX]

Sport mode does 3 things from the factory:
1.) Stiffen suspension
2.) Add steering weight
3.) Increase throttle response

So, sport mode doesn't add any boost? because it feels like it does. maybe thats just how much more responsive the car is in sport mode.

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