VMC wrote:Thanks guys, .060" shim it is.
i would definetly use the .060" Shim to be safe !
however,
all the #462 castings i've ported for SuperStock
i mill spring seats 1.635 OD->
1st= i use a modified 1.560" od cutter with a .060" corner radius
custom ground into that blade
2nd= then i put a .060" thick Shim on the seat
and come back with a 1.635" OD Cutter with
a custom ground .060 corner radius
those 2 cutter radius blend in to each other
and you put .060 shim and figure Installed Heights
using at least that .060 or .030 thick shim plus whatever more
Shims you might need.
on the #041x on just a few pairs
i've went all the way down with a 1.635 - 1.640 OD cutter
w/.060 corner radius
i've only seen 1 #041x head break thru @ 1.640 all the way down
but there are at least 2 versions or 2 different castings
that have different water jacket configurations around the
spring seats, ...but usually i always use the
1.560 w/.060 radius + 1.640 w/.060 radius on all those type castings
#462, #461, #041x
there are at least 3 or more versions of the #462's
again with some water jacket configurations around the spring seats
that are different
i had 1 SuperStock Racer from Baton Rouge
pickup up his #041x Heads here at my Shop,
1 of the #041x's had that different water jacket configuration
around the spring seats...and the other #041x didn't
..i had all the Installed Heights perfectly the same as could be
he left, drove back to Baton Rouge,
starts bolting the Heads on,
then calls me complaining i setup the Spring Heights
different from one Head to the other
he won't listen to reason over the Phone
so he drives back to my Shop that night
and i show him and let him personally check the Installed Heights
here with height mikes....well he leaves apologizing
one of the Heads looks like the Springs are way deeper than the other
its real obvious when you see them side by side,
but they are the same heights
all i'm saying be careful, as there are different casting versions
of the same #462's out there
and a 1.560" od cutter w/.060 shim as a depth stop is the wiser choice
on some of the #186's even 1.480 Cutter can get you into trouble
...always step cut a #186 or the old #492's ( were the worst )
heads w/ .060 shim at 1.480