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Now that I am thinking of cylinder de-activation, why not get ahold of a Vtec-L or VVTi-L (honda or Toyota) and then just grind off the low-speed cam lobe on the cylinders you want de-activated, grind the high-speed cam lobes down to a economy-friendly profile at the same time, then run the engine with the Vtec circuit continually active for all cylinders, off for 2-3 cylinders.
Would it be possible to do this by adjusting the rockers very loose? I don't know.
Strange thought, why not run the spare two cylinders as an air-compressor and have a hybrid air-powered system for acceleration?
I would pull the pistons, rods, have the crank re-balanced, plug the oil passages to the missing rods, grind off the cam lobes, and run a small turbo.
As I have mentioned before, the smart money may be on sourcing a 1.2L or 1.4L motor/block/crank from the euro/world market (South America maybe?)
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