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| Joined: | 09-17-2007 |
| Location: | San Francisco, California USA |
| Posts: | 221 |
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Esprit2 wrote:
If you removed the nut & washer so you could see the ends of the camshafts in the pulley bores, then...
You would see that the keyways are located above that centerline between the cams.
The intake keyway is in the upper-left quadrant, at about 10:00 o'clock
The exhaust keyway is in the upper-right quadrant, and about 2:00 o'clock.
The keyway for these cams is cut right on the intake/exhaust lobe centers. The wheels are the Dave Bean veniers (square tooth) and they have some arbitrary 2 degree timing marks that line up with the intake and exhaust opening/closing events. The keyway for the intake faces at about 9/10 o'clock when at TDC, the exhaust at about 3-4 o'clock.
The intake lobe and the exhaust lobe positions, as I marked them, have both the intake slightly open (just opened) and the exhaust slightly open (about to close). Does that make sense? If I clock the intake at 10 o'clock (upper left hand quadrant) they will be about 100 degrees from opening, and the exhaust at 2 o'clock (upper right hand quadrant) would be about 100 degrees after closing.
Last edited on 05-16-2020 06:37 am by discogodfather