[Power Surge]

A couple other things that you can look into that would add some good quality to your paper...

While Dodge is using the HEMI name on these new motors, my understanding is that they are not actually hemispherical chambers. I am not sure on that, just what I heard. Might be worth looking into.

Also, Ford's 4.6 DOHC (DUAL overhead cam) motor is a hemi. It's a modern version, with 4 vales per cylinder, and a central plug. You could use that for your paper to tie old technology vs new.

And one last Hemi fact.... Dodge built ONE 4 valve per chamber 426 Hemi in the 60s. This motor was Dodge's answer to the Ford 427 SOHC. You may still be able to find info on it. I remember a magazine article from the late 80s (I think) about it, titled "the hemi that never was".

Hope this helps.