Quote:
Originally Posted by zebra
somebody smart correct me if i'm wrong, but the way i understand compression is that the cylinder still moves the same volume of air at 11:1 as it does at 9:1 (because the crank & rod length is still the same) - it's just that the higher compression squeezes said volume into a smaller space, which creates more heat & explosive force, resulting in a higher potential for knock but yielding more power.
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Well I'm not smart, lol, but I figure the same. So the naturally aspirated 9:1 would be considerably less power than the NA 11:1 because the compression would be, say, only 170 pounds for the 9:1 instead of 220 pounds for the 11:1. (to use an example AND assuming the same displacement)
Boosting that 9:1 to make 220 pounds at compression to match the 11:1s 220 pounds of compression would make more power because the 220 pounds of pressure in the 9:1 would be with more volume in the compressed/clearance area.
I just assumed that was the way it worked. I was never told that just kind of made a guess.
Now I'm curious.