Originally Posted by Meatwad
So I was looking at which compression ratio I want to go with. The block is iron. I can do 11:1 compression ratio no problem an below. I've been told 11:1 is too much for 91 octane and I've been told that it is fine. What is the ideal CR for 91?
Depends on the ignition timing, ( aka spark advance ) and cylinder head temperature.
96 T/A, Black/Graphite Leather, T-Tops, 6 speed, 10 speaker Delco/Bose "Monsoon"
Original owner, 188k miles and counting.
Total engine rebuild at 187,020 miles.
AIR delete. Bored .030 over.
Comp cams Xtreme Energy LT1 266HR-14 street cam and springs..
lift I .500 E .510 duration I 266 E 276