[Madact]

OK, so it may have been a touch imprudent, but I've just acquired a used D15B 3-stage (AKA D15Z7) head, complete but without manifolds or wiring (yes, it has the dual solenoids). Goodness only knows what condition, of course - I'll see when it arrives - and whether I can pull off the mini-me swap. This popped up for about the same price I could get a VTEC-E head, so I figured it may be worth it.

Anyhow, I'm aware I'll need to sort out engine management, linear O2 sensor, and wiring, but any experience or details with doing this swap - or something similar - would be greatly appreciated. I'd really like to get it done using OEM parts, nothing after-market if possible, with the possible exception of combining a lean-burn capable ECU with a separate VTEC controller for high RPM. The destination engine is a D16Y4 (very similar to the US D-series engines, except for lack of OBD ECU).

Some specific questions I'd like to work out (beyond the questions of ECU and wiring):
* What the effect (if any) on compression ratio will be.
* Whether I'll need to do anything special with the intake manifold - in particular whether I need EGR to take advantage of lean-burn.