340 Head/Cam upgrade before vs after with results

yellow rose said

I'm not a fan of solid rollers on Pcar heads. Hard to get enough lift and spring. It's hard to net .600 lift and get a spring for a solid lifter. Let alone a roller. And then, you have to correct the geometry. Add valve length and you just about have to add blocks, which is a bunch of work, and you still have a Pcar head.

Click to expand...

I just love the solid roller ramp rates, area under the curve and increased lift with no increase in duration. It's really a win win. Is it a pain? Maybe. Does it cost a lot more? Yup. But have to make sacrifices somewhere. Besides, nothing cooler than a solid roller street motor. Of course there's just no reason not to run solid these days. Unless you're a guy who just doesn't like to look at his engine. The myths behind solid cam's needs to die. I know lots of guys running flat and roller solids and they check their lash every 3 months and it's almost always the same. Cam's are different these days. Learn to work on your car.

As for valve sizes? I wasn't going to touch that one. I've been telling people for over a decade that the whole valve too big thing needs to go out the window along with its cousin"3/4 race" cam and "solids are too much maintenance".