Captain Obvious stuff on 440 vs 426 Hemi curves; been that way for 50 years. It's the heads; remember the air pump analogy...
They didn't do the Hemi any favors with 9.0:1 static CR; they like CR.
Heck, that's why the Hemi chamber was developed in the 1st place - power & reduced detonation on crap gas.
My 438" Hemi street motor, old-school Crower SFT with similar specs, was 10.8:1 and happy on pump 92.
490 ft/lbs, 540HP by 7000 and climbing, and not a radical thing to operate. Did need 4.10s but it was happy cruising at 3500.
Like the world's largest SBC, it was plenty adequate under 3500, but after that, impressive and tore through the tach.

MT isn't free with Hagerty any more, it's $3/month.
Engine Masters, the Roadkill & HRG stuff, and old episodes of TopGear (UK) are all I'm interested in, so still deciding...

This stupid kind of BS is what makes a test like this a joke. Obviously, a Hemi and a wedge like different cam profiles and will tolerate different compression levels. Using mods that are not optimized to the engine is ridiculous. Nobody interested in performance buys a hemi and kills the lift and drops the compression. Either test a pair of totally bone stock engines, or even better make changes to each that are optimized for that motor.

Thank you for the explanation, that makes complete sense. Also makes sense now as to why they added the 2nd plug and quench areas to the G3 head.

Finally got around to watching it, enjoyed the episode.

Hopefully 146 cubic inches larger than stock will be enough of a change to notice a slight improvement.

Agree 100%

Looks good Rich. I like the powder coated engine plate.

Thanks Jeff. I've had some good influences in that area (Chip and yourself come to mind)

The results are easily explained. 440 has too small ports stock.426 has too large ports stock....Increase the hemi by 100 CI and the results will be much better torque wise per CI.

The Chrysler engineers could've easily put a 4.250 stroke in the Hemi engine from the factory. There is enough room for it and they had the technology available to them. I don't know if they just didn't think of it or maybe they thought better of it. That would've been a 482 at the stock bore size and it probably would've been a monster on the street back in the 70's.

I could imagine the smile on a insurance agents face in 1970 when you walked in and told him you just bought a new 482 Hemi Cuda.

I believe the NASCAR rules had a 7 liter limit in engine displacement. The Hemis big ports were designed for high RPM power on the race track.

both NHRA and NASCAR had a max 427 C.I. limit for production cars being raced back then Circa 1962,1963 era