360 timing

funwithfuel said

I'm not totally "ignorant" to theory and application. And more often than not I do agree with you. Perhaps 9.08 :1 is a bit extreme. So..... what is factory compression for 5.9 magnum engine out of the box truck engine?. I await the ridicule and name calling..... Rant off.

Click to expand...

No name calling - The Magnums come with a factory static compression ratio of 9.1:1. However, what you are describing is the effect of the intake closing event added to the compression calculation - otherwise known as dynamic compression ratio. I'd have to find the specs and do the math, but I believe the Magnum would have a dynamic ratio in the 7.5:1 range.
So no ridicule - but you're looking at static compression ratio but describing a situation where you adjusted the dynamic compression ratio - it's apples to crab apples comparison.