Stocker Tooled Steel Cam & Lifters

SS/AM · 08-07-2025, 09:28 PM

Steel core cams and DLC lifters went over 1000 miles in NASCAR 20 years ago, all the while lofting the lifters/valves (added lift, big advantage in a stocker).
Lifter foot crown height, and who applies the DLC to them are key, as well as who you talk to at your cam company, in our case it was Steve Brown at Comp, if he's still there I'd call him.

john ancona · 08-08-2025, 03:13 AM

The question is at what lift ,spring rate along with what spring seat pressure

Alan Roehrich · 08-08-2025, 01:39 PM

To be abundantly clear, what NASCAR is using is so far removed from what is on an NHRA flat tappet Stock Eliminator engine as to complete preclude any direct comparison.

And I remember vividly more than one instance where entire teams had failures directly attributed to DLC, and even engine suppliers who supplied several top teams. JGR at one point pulled every engine in every single car they had, and every team they supplied. The DLC came off, and they were arguing with the DLC coater, the lifter supplier, and looking at their oil that they were having blended themselves.

It's not common now, but again, these are engines with larger diameter lifters, with shaft mounted high ratio rockers, closed cam tunnels, with 60MM and larger cam cores, trick oiling, dry sumps, and entirely different cam profiles and valve train systems.

SS/AM · 08-09-2025, 12:41 PM

We heard, but weren't concerned, nor did we care if other teams had issues, we didn't. All did their own R&D, even if the brands were identical. Funny how a shop with the issues had an in-house oil "expert", bbbbb be careful who's advice you take to heart.

What I've mentioned is exactly what I'd do today, if anyone wants to keep their head buried in 1995 it's up to them.

Happy Racing

Terry Cain · 08-09-2025, 07:58 PM

Quote:

Originally Posted by john ancona

The question is at what lift ,spring rate along with what spring seat pressure

AND RPM and weight of valve.

08-07-2025, 09:28 PM	#1
SS/AM Junior Member Join Date: Jun 2025 Posts: 17 Likes: 1 Liked 21 Times in 7 Posts	Re: Stocker Tooled Steel Cam & Lifters Steel core cams and DLC lifters went over 1000 miles in NASCAR 20 years ago, all the while lofting the lifters/valves (added lift, big advantage in a stocker). Lifter foot crown height, and who applies the DLC to them are key, as well as who you talk to at your cam company, in our case it was Steve Brown at Comp, if he's still there I'd call him.

08-08-2025, 03:13 AM	#2
john ancona Member Join Date: Mar 2006 Location: California Posts: 192 Likes: 4 Liked 187 Times in 58 Posts	Re: Stocker Tooled Steel Cam & Lifters The question is at what lift ,spring rate along with what spring seat pressure __________________ John Ancona 717 STK / SS

08-08-2025, 01:39 PM	#3
Alan Roehrich Veteran Member Join Date: May 2006 Location: Murfreesboro TN Posts: 5,130 Likes: 1,591 Liked 1,909 Times in 427 Posts	Re: Stocker Tooled Steel Cam & Lifters To be abundantly clear, what NASCAR is using is so far removed from what is on an NHRA flat tappet Stock Eliminator engine as to complete preclude any direct comparison. And I remember vividly more than one instance where entire teams had failures directly attributed to DLC, and even engine suppliers who supplied several top teams. JGR at one point pulled every engine in every single car they had, and every team they supplied. The DLC came off, and they were arguing with the DLC coater, the lifter supplier, and looking at their oil that they were having blended themselves. It's not common now, but again, these are engines with larger diameter lifters, with shaft mounted high ratio rockers, closed cam tunnels, with 60MM and larger cam cores, trick oiling, dry sumps, and entirely different cam profiles and valve train systems. __________________ Alan Roehrich 212A G/S

08-09-2025, 12:41 PM	#4
SS/AM Junior Member Join Date: Jun 2025 Posts: 17 Likes: 1 Liked 21 Times in 7 Posts	Re: Stocker Tooled Steel Cam & Lifters We heard, but weren't concerned, nor did we care if other teams had issues, we didn't. All did their own R&D, even if the brands were identical. Funny how a shop with the issues had an in-house oil "expert", bbbbb be careful who's advice you take to heart. What I've mentioned is exactly what I'd do today, if anyone wants to keep their head buried in 1995 it's up to them. Happy Racing Last edited by SS/AM; 08-09-2025 at 12:44 PM.