[Mark G]

Originally Posted by BruceWilkie

Endurance series are the only ones I've heard of breakage , go figure. I know of a set of race series with Nextec springs and @ .765 lift went at least 4 years 3 of the years in a boat.

Bruce your right race series ones are good for 950 lift ....Then again any thing can fail on a race motor.. .The only rocker I ever broke in two pieces was a Crane Gold 20 yrs old ...lol

[Dragncar]

Originally Posted by PAUL K

That's where they usually break. From the other posts here, there seems to be quite a few that haven't had any issues. I'm thinking it might be a quality control issue. On one engine we had seven rockers break and it was a mild HFT set up. On a competition engine Crower SS are always our first choice followed by Crower aluminum or the original Gold Cranes... if a shaft system isn't in the budget.

I have been running Norris SS rockers for years. They were the first ones. Crower copied them in a way. The bearing are very large, lash does not change either.
They are still in business but don't make the Pontiac's anymore.
Tom S knows them and said they would make a Pontiac run if the had 10-20 sets sold.
Only paid 260$ for mine around 1998.

[PontiacMatt72]

Originally Posted by Dragncar

I have been running Norris SS rockers for years. They were the first ones. Crower copied them in a way. The bearing are very large, lash does not change either.
They are still in business but don't make the Pontiac's anymore.
Tom S knows them and said they would make a Pontiac run if the had 10-20 sets sold.
Only paid 260$ for mine around 1998.

I’d be interested if price would be competitive with Crower.

[Aaron Quinton]

Jimmy,

I've not run those rockers. I've run Yella Terra and Norris stainless rockers without issue.

Aaron

[SupergasDil]

Jimmy, what open spring pressure did you have at full lift?

[SupergasDil]

I'm just thinking out loud here. How far away from coil bind are the springs now that you've upped the ratio to 1.65 ? And assuming you have plenty of valve stem length