[wndsnd]

I am building a 2.7 magnesium case engine.

I have a straight edge ground to .001" or 0.0254mm

Placed across the spigots on the right side I can measure - 0.1778-0.1905mm
on the center bore.

Placed across the spigots on the left side I can measure -0.1524 - 0.1651 mm

Base gaskets are available in .25mm and .50mm and 1.0mm

My questions are, should I use an additional .25mm gasket on the center, compbined with what I decide I need for deck height clearance?

and, is that severe, moderate, or minimal distortion for a mag case.


Thanks for your input!
John