Identifying camshafts
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==Roller vs. flat tappet== | ==Roller vs. flat tappet== | ||
[[File:Roller L ft R.jpg|thumb|400px|left|Roller cam, left; flat tappet cam, right]] | [[File:Roller L ft R.jpg|thumb|400px|left|Roller cam, left; flat tappet cam, right]] | ||
| − | Telling one from the other 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 | + | 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. |
| − | + | In the image on the left is a hydraulic roller cam, the rounded lobes are readily appearant compared to the flat tappet cam to the right of it. | |
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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==Warnings== | ==Warnings== | ||
| − | Roller cams cannot use flat tappet lifters, and vice versa. Besides the 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. | + | 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]] <br style="clear:both"/> | [[File:Ft vs roller.jpg]] <br style="clear:both"/> | ||
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