hemi advantage?

RustyRatRod said

You're right. It is an old design from aircraft engines, but it's a damn good one that's still tough to beat today, IMO. Were they still using the exact same early Hemi combustion chamber coupled with all the fancy computer stuff, I think you'd really see something. Course, I been wrong before, I could be again.

Click to expand...

Nissan did it in the 80s with the 2.4L truck engine. It was fantastic, had EFI, dual plugs, and ran like Swiss watches. But - technology moves forward and now Nissan uses a closed chamber, 4 valve design with a dish and quench ring - because as good as you can get it - the true hemi shape is inefficient in terms of emissions and economy. There's too much real estate in there to really work well. Ford Escorts used to have a really funky piston in the 1.6L which was a semi-hemi to try and get keep the mixture away from that dead space with a big chamber. It worked - but not well.