[Formulajones]

Originally Posted by PunchT37

Iv`e got those Johnson`s in mine. Edel round ports, 8.900 pushrod, and HS rockers. Has been to 6500 and 6200 many times. All good so far. Road Paver cam.

Probably never have an issue with them. Johnson makes a good lifter, with good internals that don't exhibit the noises that so many complain about.

Those Johnsons I pictured on the left, you can tell they've been run. They were in a 455 with eddy round ports and a custom 254/262 @ .050 cam that Jeff Kauffman spec'd for that engine. They saw 6000 rpm many times over a period of 5-6 years that engine was together and thousands of street miles, whisper quiet, they worked perfectly and nothing wrong with them when that engine came out. They'll go back in something in the future.

I have the same hydraulic roller lifters in my 454 Chevelle with a 242/248 cam that have been in there going on 20 years now. That one sees 6500 semi frequently. They work perfectly.