I am also going to put in a 4G92 DOHC soon. But mine is terbalik one. Good to hear some feedback from friends here. However, I will disagree with Powerzone recommendation due to their case who spoil my O2 sensor and not willing to pay for damages. For your info, the consumer tribunal awarded the case to me and they paid finally.
And as for the recommended shop who claims to do a moster MIVEC with just some setting of AFC... I think definitely need some real mods. You cannot expect magic just tuning AF. How about Ignition and increasing CC ? Those are more important and will increase horses. No offense. Just think you will need more than AF to do magic number of HP.
While waiting for the perfect halfcut, I have done lots of research with some feedbacks from friends here. I think I will:
a) Use larger throttle body (don't know which model)
b) Tomei Oversized forged piston
c) Port Polish from MatSpeed
d) JUN cams and Valve springs set
e) 1.8 block definitely and rebore to 1.9 or 2.0
f) Maintain my e-manage but add relay to control MIVEC
g) Fuel pressure regulator
h) Adjustable cam pulley
g) Supercharge cannot fit my car, most likely turbo it at the end of the day...
I don't think putting in a racing cam will affect MIVEC idling. The real beauty of MIVEC is because we can have a real racing cam profile when we slam the accelerator pedal. And when we are normal driving and before MIVEC kicks in, we can use a lower profile.
Just my 2 cents.