[Greg Reimer 7376]

This whole thing made me think of some things. We all know about an optimal stock eliminator motor. That is one with minimal deck height,valve lift that is good by .005-,002,cylinder head chamber volumns within .5cc's, etc. and the catch here is that they pass all lift and cc checks when room temp, but might not when hot. We had a very detailed discussion on push rod length on here a few years back, fun discussion and good thinking by all contributors, but what could hot engine temps do to push rod length, and valve lift as checked? It's not the as-built dimensions that really matter in a tear down situation, it's the as-checked dimensions that turn up when checked. Temperature changes could trip any one of us up. It would be advantageous to build motors with .010" less lift, one half cc chamber volumn to the large side, and all rocker arm ratios in line with specs by .03 or so.How close can you push the limit and come up good at any temperature? Also, if an engine is checked with different measuring tools than the engine builder used,what is the margin of error?Again, the checker's conclusions will trump any engine builder's conclusion. Obviously, when you enter and sign that tech card,you assume any responsibility for any situation that may arise from you racing that day.