greymouser7
Vagrant Vagabond “Veni Vidi Vici”
- Joined
- Apr 17, 2010
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A few have posted this here as I randomly read engine build threads: they won't build Hydraulic Flat Tappet Camshaft engines.
Hardness of lifters and cams have been blamed,
Oil ZDDP has been a previous culprit, (to include modern oil has cleaning additives/detergents that wipe ZDDP off of lobes?)
>>>Manufacturing quality control standards has dropped off<<<
1. So has this become a rare procession of the past? (Building Hydraulic Flat Tappet Camshaft engines) (Don't try it unless you like gambling $ )
2. ROCKWELL Hardness testers prove that lifters and camshafts are still hard enough? Is this typically consistent?
3. If you measure Camshaft and lifter lobe 'CROWN ARC TAPER' {1.5 TO 3 THOUSANDTHS TAPER??} will that be enough with break in oil?
4. LA engine and Big Block builds (Slants????)- DO we need to bush the lifter bores for adapting to roller camshafts?
5. (please forgive my ignorance) Best break in procedures for Hydraulic flat tappet camshaft engines (OR Mechanical flat tappet cammed engines)?
Prior to retirement I prepped to build several Hydraulic Flat tappet LA 360's, all the parts have been bought and now I personally just discovered this issue.
Hardness of lifters and cams have been blamed,
Oil ZDDP has been a previous culprit, (to include modern oil has cleaning additives/detergents that wipe ZDDP off of lobes?)
>>>Manufacturing quality control standards has dropped off<<<
1. So has this become a rare procession of the past? (Building Hydraulic Flat Tappet Camshaft engines) (Don't try it unless you like gambling $ )
2. ROCKWELL Hardness testers prove that lifters and camshafts are still hard enough? Is this typically consistent?
3. If you measure Camshaft and lifter lobe 'CROWN ARC TAPER' {1.5 TO 3 THOUSANDTHS TAPER??} will that be enough with break in oil?
4. LA engine and Big Block builds (Slants????)- DO we need to bush the lifter bores for adapting to roller camshafts?
5. (please forgive my ignorance) Best break in procedures for Hydraulic flat tappet camshaft engines (OR Mechanical flat tappet cammed engines)?
Prior to retirement I prepped to build several Hydraulic Flat tappet LA 360's, all the parts have been bought and now I personally just discovered this issue.