Rwhp
Race Director
Joined: Jan 2000
Posts: 13,015
Likes: 2,260
From: Corsicana, Tx
2020 C2 of the Year - Modified Winner
2020 Corvette of the Year (performance mods)
C2 of Year Winner (performance mods) 2019
2017 C2 of Year Finalist
Yep...you're right. But those are very mild ramp cams as compared to the type of cams needed for a serious big block....or small block for that matter. Even the bad boy stuff is pretty mild as compared to what everyone uses in BBC's for serious stuff.
They use a giant cam core/lobe that allows a lot more room for cam designers to play. Stuff the rest of us old school motor guys only dream of unless we bore block to 55-60 mm cam cores.
The valvetrain is very light as compared to a BBC. The LS-7's are using titanium valves to save weight, lower spring requirements and get RPM. We can do that too....but it's awful pricy!
It all adds up...GM did their homework...except for the funky oiling system on that motor. But even that is a huge improvement for the lifters over our stuff.....it has full pressure to each and every lifter 100% of the time. The galleries are down the side of the bores instead of down the center like small/big blocks. Figure GM might have thought about what it was going to take to make them live? Sure wish Dart or merlin would pay attention! Sure would be good for us!
JIM
They use a giant cam core/lobe that allows a lot more room for cam designers to play. Stuff the rest of us old school motor guys only dream of unless we bore block to 55-60 mm cam cores.
The valvetrain is very light as compared to a BBC. The LS-7's are using titanium valves to save weight, lower spring requirements and get RPM. We can do that too....but it's awful pricy!
It all adds up...GM did their homework...except for the funky oiling system on that motor. But even that is a huge improvement for the lifters over our stuff.....it has full pressure to each and every lifter 100% of the time. The galleries are down the side of the bores instead of down the center like small/big blocks. Figure GM might have thought about what it was going to take to make them live? Sure wish Dart or merlin would pay attention! Sure would be good for us!
JIM
