Bluetop 4age(C) identifying

[dreja]

Hi,
under the hood of my ae86 bluetop there's a label. There's engine scheme with sensors etc. written on it and also says 4agec.

I've read that C stands for emission control. So it might take some power away. So how do I know if my engine is really C (4ageC) and not 4age (without C)?

Is it possible to convert it to 4age (without C) or to put away the emission system (to gain some power) or there should be changed also ECU, sensors, etc.?

And another thing:
Do your bluetop engines have Tvis (I'm not sure, but on mux's pictures there's no tvis)? Mine has got it.

Andrej