Sd of SA-15

[bbeljefe]

I have an SA-15 coming my way but I plan to build a t-line for it this weekend and I need to know the surface diameter of the piston. In case someone has one and doesn't know what I mean, I need the measurement from center of surround to center of surround on opposite sides.

Thanks in advance for your help!

[SPLadd1ct]

just measured my sa-15 from my personal collection.

i used a tape measure to obtain center to center of the surrounds diameter of the cone area.

i got 12 & 13/16" which equivocates to 12.8125".

so pi ((12.8125/2)^2) = 128.93 square inches

the standard units they use for sd is square centimeters i believe.

there are 6.4516 square centimeters in a square inch so ((128.93)x(6.4516)) = 831.8 square centimeters.

hope this helped bud

[bbeljefe]

Thanks a million man... 12 13/16" is just what I needed to know. I don't speak centimeters but I appreciate the extra effort you put in. :-)