Early last year uncle jack did a lot of research on lifter hardness
(check the archives). He found the BPNW lifters consistently tested
about 57 Rc. The only problem with them is that someone in India or
Pakistan, or wherever they are made decided to put a rather large
chamfer on the edge. This cuts down the effect diameter by about
0.040. If your cam requires a full sized lifter, don't use them without
removing the chamfer.
Larry
Steven Belfer wrote:
> I too have a new set of BP Northwest lifters that are going into my
> new engine build. We shall see what happens. Their website states
> their hardness specs and since this is a mild race engine, I'm taking
> a chance with them. Obviously, there are tons of searchable posts on
> lifter hardness.
>
> My new lifters weigh in at 68g
> My stock lifter that handled 20 races weighed 72g
> My race-prepped stock lifter that came out of another well used and
> successful race motor weighed 52g.
>
> ~STEVE
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