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Old 01-03-2013, 04:07 PM   #1361
Scooby Specialist
Member#: 51480
Join Date: Dec 2003
Chapter/Region: International
Location: The Netherlands
1984 AM5, 1984 AF1,
1994 BC4, 2015 Outback


The lifter being higher up its bore with either a longer valve or a thicker shim would not be a concern. It won't rock in the bore.

As long as the low lobe and high lobe are increased by the same amount (ie. the difference in base circle stays the same) then there is no issue. My feeling says that a bit bigger difference would be acceptable, if the base circle is almost the same I guess there would be difficulties with the system switching from low to high lobe (then there would not be enough 'time' to push the plunger in the bucket to lock the bucket)..
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Marnix is offline   Reply With Quote