How to choose a camshaft
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==Solid vs. hydraulic camshaft== | ==Solid vs. hydraulic camshaft== | ||
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| − | Above is a hydraulic roller cam, the rounded lobes are readily appearant compared to the flat tappet cam to the right of it. | + | |
| + | ==Flat tappet vs. roller== | ||
| + | [[File:Roller L ft R.jpg|thumb|400px|left|Roller cam, left; flat tappet cam, right]] | ||
| + | Telling one from the other visually is relatively easy. The roller cam will have much more rounded lobes, like the big end of an egg. A flat tappet cam will be much more pointed, similar to the small end of an egg. Above is a hydraulic roller cam, the rounded lobes are readily appearant compared to the flat tappet cam to the right of it. More at [[Identifying camshafts]]. | ||
Often roller cams will be made of steel and will be shiny instead of a flat black color of a flat tappet cam caused by the wear treatment it is given. | Often roller cams will be made of steel and will be shiny instead of a flat black color of a flat tappet cam caused by the wear treatment it is given. | ||
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{{Warning}} Roller cams cannot use flat tappet lifters, and vice versa. Besides the possible mechanical interference between a flat tappet and a roller cam lobe, the timing events will be skewed much to badly for this to work. A roller lifter on a flat tappet lobe would have very little duration, a flat tappet on a roller lobe would have way too much duration, even if it could work without mechanical interference. | {{Warning}} Roller cams cannot use flat tappet lifters, and vice versa. Besides the possible mechanical interference between a flat tappet and a roller cam lobe, the timing events will be skewed much to badly for this to work. A roller lifter on a flat tappet lobe would have very little duration, a flat tappet on a roller lobe would have way too much duration, even if it could work without mechanical interference. | ||
| − | [[File:Ft vs roller.jpg]] | + | [[File:Ft vs roller.jpg]] |
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| + | [[File:Crower hippo.jpg|thumb|450px||Crower HIPPO (Hi Pressure Pin Oiler) lifter]] [[File:Comp enduro-x.jpg|thumb|450px|left|Endure-X roller lifter]]<br style="clear:both"/> | ||
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| + | Comp Cams Endure-X roller lifter is designed specifically for street and marine use. The groove directs pressurized oil to the lobes and roller bearings to keep it alive at low rpm, because it is at low RPM that the roller lifter suffers from a lack of lubrication. | ||
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==Things that can "frag" a camshaft and lifters== | ==Things that can "frag" a camshaft and lifters== | ||
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