They ate hemi engines just not the same the old hemi got its name from the hemispherical combustion chamber in te cylinder head the new eng is kida like that with a small bump in it for emission reasons so technically its non longer a hemi persay but its the same in that its a Chrysler hemi if that makes sense
"CMR TUNER" [email protected] 1/4 with a 7.32 1/8 custom long/short bars by "Me" Turbocharged 392 on 9psi S475/96/1.32 . Running thru an A518! [email protected]
Main difference is the new Hemi vs the old Hemi - More hp per sq inch....the new (09+) one is a 345 making 390 hp. Old 426 was 425 hp. Here's a good write up on the old Hemi....Mopar - Chrysler 426 Hemi engine
The overall general shape and more to the point the cylinder head layout/architecture (dual rocker shafts with opposed valves) is similar to the previous versions. Even the 2G wasn't as hemispherical as the 50's version. Early 331's were marketed as the Chrysler 'dual rocker shaft' engine before 'Chrysler Firepower Hemi' got used. As stated, the chamber had to be modified for emissions. So yes and no lol.
Inverted hemi prototyped in a P-47, never made it to production. It was liquid cooled, which allowed for a more aerodynamic nose and allowed the test Thunderbolt to go faster than any previous P-47 had.
Here's a comparison between the Gen III combustion chamber and the Gen II 426 combustion chamber. The squish areas to the sides of the Gen III were added for emissions purposes I believe. One of the basic parts of the Hemi design is the opposed valves, intake opposite exhaust. Both Gen II and Gen III have that. The Gen III isn't a pure hemisphere due to the squish areas. But it is close enough for me and it breathes very well.
__________________ '05 RCSB 1500 SLT 5.7 Hemi Ram - Airaid Long Snorkel UBI CAI - Taylor shorty wires - MSD Coil Packs – Magnaflow y-pipe - Flowmaster 50HD - Superchips 3865 - Motive 4.56 gears - Detroit Truetrac - PML differential cover – some good Karma 8.87 ET