Valve keeper drawings.
Valve keeper drawings.
(OP)
Merry Christmas to everyone! (the order of the days!)
On the technical side, I'd like to know where in the web I can find actual drawings for valve keepers. I'm building an Alfa Romeo V6 engine as subject of a book I'm writing and in the area of valve spring installed height and valve lift with proprietary valves,when trying out different combinations of keepers and retainers (single/triple groove)I noticed that the interference angles are different (for the same 8mm stem diameter). I would assume that these angles are industry-standard - are they? My observation so far is that all single-groove keepers have one angle and 3-groove ones another, which of course also differentiates retainers.
Regards,
Jim K.
On the technical side, I'd like to know where in the web I can find actual drawings for valve keepers. I'm building an Alfa Romeo V6 engine as subject of a book I'm writing and in the area of valve spring installed height and valve lift with proprietary valves,when trying out different combinations of keepers and retainers (single/triple groove)I noticed that the interference angles are different (for the same 8mm stem diameter). I would assume that these angles are industry-standard - are they? My observation so far is that all single-groove keepers have one angle and 3-groove ones another, which of course also differentiates retainers.
Regards,
Jim K.





RE: Valve keeper drawings.
Some keepers are designed to clamp onto the stem and some are designed to clamp around the stem and still permit some rotation. The latter type is usually a three groove design. Put a pair of keepers on the valve stem and see if the keepers touch together and allow motion or if there is a gap between one or both ends of the keepers when they are clamped onto the stem with finger pressure.
Good luck with the book.
RE: Valve keeper drawings.
As far as 'loose' and 'tight' keepers go, since this is a hi-perf/light track duty engine, one of the valvetrain jobs is to make sure the keepers clamp the valve tight so it doesn't rotate (accomplished by keeper sanding on a flat surface, until their ends don't butt any more). Rotation is supposedly desirable for seat 'cleaning' in road engines but 'loose' valves are not an accepted practice in performance situations.
Regards,
Jim K.
RE: Valve keeper drawings.
Go figger.
I would assume that whatever engine you have, a cam and valvetrain maker has a combination ready to drop in and work perfectly the first time.
Franz
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RE: Valve keeper drawings.
Regards,
Jim K.