[stillsearching]

The idea of the Vortec head was that fuel would swirl helping the gas and air stay in suspension better at lower speeds, giving better torque and economy in the lower range. I would assume such an idea would be patented if it works. (my guess is spinning anything would whirl out the fuel but whatever)

Were they actually some kind of an economy/torque breakthrough or is it just all marketing BS? Are there more efficient heads on the market in terms of BSFC for power generated on whats otherwise the same engine? Someone else discussed hemi vs wedge vs bowl combustion chamber shapes, i'm not sure if the Vortec really fit any of them.


I do know that the large engines like the 8.1 Vortec in motorhomes got more like 8.5mpg instead of 6mpg from previous generation 454's in similar chassis seemed to get... it was almost diesel levels of mileage which I found interesting, hence they were still in the Top Kick and such when most other medium duties went diesel only.