212 hemi head milled .055. How much valve clearance? Are shorter pushrods needed?

[GeroniMoe]

Just had my Hemi 212 head milled .055, running a +.020 rod with zero deck height and a .027 multilayer gasket.
I want to know whats the correct piston to valve clearance...also do i need shorter pushrods to keep proper geometry

 

[ole4]

if you are sure about the 0 deck height then .027 is probably OK but you would normally want .030. Did you check to make sure to rock the piston and check the high side to make sure there is no popout? Your pushrods should be fine if running the stock cam but if you are changing cams you should check the geometry, also you can measure the base circle with a caliper to see if it is close to the stock cam that also affects geometry. Piston to valve clearance you need to measure if changing cams to one with more duration or tighter LSA. You want .080 min on exhaust and .060 min on intake. You can use clay

 

[GeroniMoe]

Running Mamba senior cam 275 lift 246 duration

 

[ole4]

You should check valve to piston clearance as well as for coil bind.

 

[GeroniMoe]

i've clayed the piston to check clearances which are ok, how do i check for proper geometry and coil bind

 

[ole4]

Coil bind is checked by turning over engine and when the valve opens stop at max lift and inspect the valve spring and see if it looks like the coils are touching each other. You should be able to fit a .060 feeler gauge between two adjacent coils.