Lifter question ?
Thread Starter
Le Mans Master
Joined: Oct 2004
Posts: 5,269
Likes: 54
From: Orlando Florida
St. Jude Donor '05
Lifter question ?
just out of curiosity: I just got an offer (email suscription), solid lifters for flat tappet cams. The ad says that they don't work with hydr. flat tappet cams 
I thought that you could run solid lifters with a hydr. cam but not a hydr. lifter with a cam designed for solid lifters ??
Does a cam that is designed for hydr. lifters need the oil cushion in the lifter for some sort of dampening ???
I thought that you could run solid lifters with a hydr. cam but not a hydr. lifter with a cam designed for solid lifters ??
Does a cam that is designed for hydr. lifters need the oil cushion in the lifter for some sort of dampening ???
Le Mans Master
Joined: Mar 2004
Posts: 7,423
Likes: 1,458
From: Little Rock AR
Solid lifter cams are ground with clearance ramps and lift ramps. The the clearance ramp is slow and the lift ramp is steep. This way the valve train can take up the slack (lash) and set the valves down with less shock/impact than if the whole valvetrain were tightened up and valves slammed closed at full lift ramp speed. Hydraulic cams do not have a clearance ramp ground into them.
-Mark.
-Mark.
Thread Starter
Le Mans Master
Joined: Oct 2004
Posts: 5,269
Likes: 54
From: Orlando Florida
St. Jude Donor '05
Originally Posted by bashcraft
I believe you have it backwards.
Maybe a good thing that I'm upgrading to hydr. roller
I thought that a solid lifter cam has more duration and allows the engine to rev higher than hydr. lifters allow....
Le Mans Master
Joined: Jan 2006
Posts: 6,497
Likes: 136
From: Butler Pa
Originally Posted by RedBad1979
I thought that a solid lifter cam has more duration and allows the engine to rev higher than hydr. lifters allow....
