Originally Posted by
92z71
^^ because at high rpm your valve train might be lagging/leading and opening at the wrong time, that would lead to less compression on cylinders, when you do it without the engine running is just a base line to go from, and you can compare the efficency of each cylinder that way also. motor/pistons and rings at operating temp and running condition.
are you fucking kidding me do a god dam leak down test
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EuroRat #2+#3
"YEA THOUGH I ROLL THROUGH THE VALLEY OF THE SHADOW OF RICE, I WILL FEAR NO TURBO FOR DISPLACEMENT AND TORQUE ART WITH ME... MY RODS AND MY PISTONS THEY COMFORT ME.."
bought not broken!!!
member #2 
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