[Formulajones]

Originally Posted by Sirrotica

Funny how LS engines can run hydraulic roller lifters for 200,000 and more miles trouble free.............

204/213 duration at .050 @ 520 lift stock GM cam in my 05 GTO.

My LS2 has 141,000 miles on it since new, never ticked once. It will run 6 grand with a stock GM valvetrain.

It seems no one gives a damn about making quality parts for our tiny market, and we just get overpriced crap. And we're supposed to be grateful they make crap for us to buy?

If someone designed a rev kit for the hydraulic roller lifters you could remove some of the spring from the heads, helping relieve some stress on pushrods and the hydraulic portion of the lifter. I know it's a small market, but we've been able to get parts a lot more technical than a rev kit made for Stratostreak engines in the past.

I have a Crower solid roller for a Pontiac from back in the 60s, fairly radical for the time, with a rev kit, never had an ounce of trouble with it, and ran it in 3 different engines. It would run 6500 RPM, but with stock cast rods I didn't take it there too many times.........

Just thinking out loud is all.

A lot of things contribute to that, I hear what you're saying. The LS engines are fantastic little pieces. The rollers live for a lot of reasons.

The LS1's I messed with for several years were lucky to have 100 lbs. seat pressure on those beehive springs. They weren't much. I think the lazy stock cam profiles helped and didn't require much spring to start with. The valvetrain is pretty light on these engines too, with some of them, like the LS6 having sodium filled valves.

Even with that said, I've done cam swaps on 100k mile engines, with a custom cam, more aggressive lobes, and upgraded the valve springs and push rods to go with it, and left the original lifters in place, then proceed to log another 80k miles on the engine with a 6700 rpm rev limit set, without a hiccup, go figure.

My sons 5.0 has it's original long block (and roller lifters) now with 253,000 miles on it. Whisper quiet. Probably has 80 lbs. springs in it lol.

The rev kit is an interesting thought. I've always liked to keep the valve train light on my engines with titanium retainers and lighter valves to help with valve train stability without spending a bunch of money.