7.4 liter LS GM V8 for 2020
that's what I was told today. 452 cubic inches, 7.4 liter. will be equipped with the LS7 427 Vette big rectangular port heads.
digging around for some info, those are one big mutha heads. nearly as big intake port volume as a Pontiac Ram Air V, and the LS7 heads flow over 320 CFM out of the box.
it's 1970 all over again. the 7.4 liter is going to be a Siamese bore block design like the old 400 small block was, but on the new LS engine block, with the 6 bolt mains.
even their "small" cathedral port heads have 200 cc intake port volume. what I was saying all along for over a decade here, without the port volume you got nuthin'
one thing about LS engines, other than the 7 liter Vette motor, they were and are small engines. the 6 liter is only 366 CID, and the 6.2 liter is only 376 CID. when I heard they made 400 HP and 400 ft. lb. torque, I was like huh what's the big deal ? a Pontiac 455 made that in 1970 with a carburetor, and 500 ft lb torque. now they are getting with the program. there's no substitute for cubes.