Roller Bearing or Hydraulic flat?
#2
Supreme Member
Any given cam is designed for one or the other- they're a matched set. You can't just change lifter types without changing the cam.
Roller cams offer advantages of higher lift and higher valve acceleration rates than you can get with a flat tappet- that typically equates to more power potential, apples to apples. However, there are offsets to this- cost being one (flat tappets are dirt cheap) and setting up a roller valvetrain to work in the higher RPMs is not always a "throw parts together and turn the key" type of affair.
Roller cams are also easy to break-in on first install (wiping out lobes is rare), where flat tappets require a specific break-in regimen if you want to have your best shot at letting the new cam/lifter live a long and healthy life.
Better? What fits your needs and budget best is what's better. Both have their place.
Roller cams offer advantages of higher lift and higher valve acceleration rates than you can get with a flat tappet- that typically equates to more power potential, apples to apples. However, there are offsets to this- cost being one (flat tappets are dirt cheap) and setting up a roller valvetrain to work in the higher RPMs is not always a "throw parts together and turn the key" type of affair.
Roller cams are also easy to break-in on first install (wiping out lobes is rare), where flat tappets require a specific break-in regimen if you want to have your best shot at letting the new cam/lifter live a long and healthy life.
Better? What fits your needs and budget best is what's better. Both have their place.
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