Mopar R1 block
I use these, unless there’s a better lifter out?
I wouldn’t call them cheap close to 600
View attachment 1715446430
Nothing wrong with that body. The wheel diameter is the big deal.
It's not if you are using a relatively mild lobe and you keep the engine speed down. When the engine speed goes up, the lobe gets more aggressive or both, the diameter of the wheel comes more critical.
The reason all the lifters come with that little .750 wheel is because that's all they can fit in an .842 Chevy sized body.
The Chrylser cam core is bigger in diameter than a Chevy core. That means to get the same lift with a Chrylser core as a Chevy core, the Chryler lobe will be bigger around.
For rough numbers, let's say it takes a total distance of 1.75 inches of surface to get .600 lift on a Chevy core, it will take 2 inches to get around a Chrylser core for .600 lift. I'm saying if you measure the distance the lifter has to travel around the lobe. Those are made up numbers, but it makes the point.
As surface speed goes up, the smaller wheel has to go faster to cover the distance. And that's when you can get into a real issue. Literally, the wheel will go into a harmonic vibration and then you're in a world of poo.
A lot of really smart people discount this, but they'd be wrong.
Most guys don't run into it because they don't run much RPM, don't run an agreesive lobe.
I just like being safe. A lifter failure is expensive.
