Can you use roller rockers with a solid lifter cam?
The two don’t necessarily need to be used together. Roller camshafts and lifters can be used in an engine that features nonroller rockers; by the same token, roller rocker arms can be used in an engine that features a flat-tappet solid or hydraulic camshaft.
Do you have to break in a solid roller cam?
Roller cams do not need to be broken-in, nor do they need any zinc in the oil, but ALL flat tappet cams need both. Do NOT break-in your cam or engine with non-detergent oil!
Is there a break in period for a new camshaft?
If there is one period of time when a flat-tappet hydraulic or mechanical lifter cam is most susceptible to severe wear, it is during the first 20 to 30 minutes of camshaft operation. This is when the lifter and cam lobe create their initial wear pattern.
How much zinc does it take to break a cam?
Current API SM and SN oil limit ZDDP (zinc and phosphorous) levels to 800 ppm. While ZDDP break-in level recommendations for flat-tappet camshafts vary widely, it appears that concentrations of around 1,500 ppm or above are appropriate, and as you can see from our testing, most of the break-in oils achieve that level.
When should I change oil after cam break in?
I personally change the oil immediately after the initial cam break-in to get the Moly lube out of the oil system. It has done its job in the first 20 minutes and no longer needed.
Can you run hydraulic lifters on a solid lifter cam?
It is possible to run hydraulic flat-tappet lifters on a solid flat-tappet cam, and hydraulic roller lifters on a mechanical roller cam. The rules in some racing classes restrict competitors to running hydraulic valve lifters. Cheaters have been known to run hydraulic lifters on a mechanical (solid) cam profile.
Can I run solid lifters on a hydraulic cam?
Putting solid lifters on a hydraulic cam will gain about 500 rpm on the top-end over hydraulic lifters due to the solid lifters’ improved valvetrain control—unlike the hydraulic, solids have no bleed-down/pump-up problems.
How do you break in a lifter and roller cam?
Start the engine and immediately raise rpm to 3,000. Vary rpm between 1,500 and 3,000 for the next 20-30 minutes. Use a slow, steady acceleration/deceleration pattern.
Do new lifters need to be broken?
Super Moderator. I believe 30 minutes is generally recommended on a new cam and lifters. Make sure to use cam break in lube. I would think new lifters on an old cam would be similar.
Why do you break in a camshaft?
Breaking in an engine with a flat tappet camshaft is critical to its performance and long life. This mates the lifters to the cam lobes. Most camshafts will come with specific break-in procedures. The following procedure could apply to any engine with a flat tappet cam.
Will solid lifters work on a hydraulic cam?
Will Solid Lifters Work on a Hydraulic Cam? It is possible to run solid flat tappets on a hydraulic flat-tappet cam and even mechanical roller lifters on a hydraulic-roller cam.
Can you run a solid lifter on a hydraulic profile?
Successfully running solid lifters on a hydraulic profile requires some amount of valve lash (a solid lifter cannot run at zero lash or be preloaded). This lash effectively reduces cam duration, especially at low lift off the valve seat (see table below).
What are the break-in procedures for a camshaft?
Most camshafts will come with specific break-in procedures. The following procedure could apply to any engine with a flat tappet cam. The specific instructions for your camshaft may vary slightly. Whenever possible, follow the manufacturer’s instructions. Always use new lifters when installing a new flat tappet camshaft. Bottom of the lifters, and
Why break in a flat tappet camshaft?
Breaking in an engine with a flat tappet camshaft is critical to its performance and long life. This mates the lifters to the cam lobes. Most camshafts will come with specific break-in procedures.