I also considered kinda odd that GM went with the V8 instead of a V6 in the hybrid layout. Well, the electric motor would be supposed to overcome the lower power either in highway or higher load conditions...
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Originally Posted by jeff88
This is just a half joke, take it with a grain of salt. You could put a turbo, so in v4 mode it will have more power and stay out of v8 mode. Don't know if it would use less gas than v8 n/a mode, but it's something you might want to look into.
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Turbocharging an engine with Atkinson-effect cams, like it's usual in hybrids, is harder due to some backpressure at the intake manifold, but a supercharger may be useful. Until mid-50s it was not unusual to use superchargers in industrial and marine engines which got a longer intake valve timing, as a measure to overcome the lower dynamic compression issue.