Engine Builders-KB356 Piston Milling
I assumed the piston top;
is flat above the dish, as can be seen in the measuring set-up pic and
none of the crown was removed,and
that the flat part is the reference surface, that yielded the .040 down number. and
a 4.030 bore x 4.00 stroke.
With a 23.5cc net dish factor and .040 down to the top of the piston proper, the total chamber volume would be 14.5cc more for a total of 102.66 and a Scr of;
(836.1 + 102.66)/102.66 =9.14
If you mill the Q-pad off and get 9cc, then the crown was milled a lot further than just enough to remove it..
And to get the piston back up to .040, the current decks must also have been cut.
With the Q-pad gone, and the dish known, I see no reason to do a .500 down measurement. I mean, at 4.03 bore we can easily do the math to find the cylinder volume as 8.36cc per .040 inch down. Add that to the measured dish and badaBoom!
I mean, with the Q-pad gone, it's just like every other build.
The .500 down is only necessary with an irregularly shaped crown, like one with a dome or q-pad..
I assumed the piston top;
is flat above the dish, as can be seen in the measuring set-up pic and
none of the crown was removed,and
that the flat part is the reference surface, that yielded the .040 down number. and
a 4.030 bore x 4.00 stroke.
With a 23.5cc net dish factor and .040 down to the top of the piston proper, the total chamber volume would be 14.5cc more for a total of 102.66 and a Scr of;
(836.1 + 102.66)/102.66 =9.14
If you mill the Q-pad off and get 9cc, then the crown was milled a lot further than just enough to remove it..
And to get the piston back up to .040, the current decks must also have been cut.
With the Q-pad gone, and the dish known, I see no reason to do a .500 down measurement. I mean, at 4.03 bore we can easily do the math to find the cylinder volume as 8.36cc per .040 inch down. Add that to the measured dish and badaBoom!
I mean, with the Q-pad gone, it's just like every other build.
The .500 down is only necessary with an irregularly shaped crown, like one with a dome or q-pad..
