Un-milled 5.3 truck head = what compression ratio?
 

maybe at most milled .03 for straightness, what would the compression be around?

Re: Un-milled 5.3 truck head = what compression ratio?
 

Ok, there going to be milled .05 thousands. What compression Ratio?

Re: Un-milled 5.3 truck head = what compression ratio?
 

If you use 5.3L truck heads, they will need to remove a little material from the chambers (around the valve area) in order to unshroud them.

My TEA 5.3L heads have been milled just .003" and the valves unshrouded. That gave them a 63cc chamber

10.8 to 1 CR using stock graphite head gaskets..... And thats plenty with pump gas IMO

Ron,

Re: Un-milled 5.3 truck head = what compression ratio?
 

50 thousands? Have fun with piston to valve clearance!

I think you mean .005" (5 thousands)