Ways to increase the efficiency of a GM 5.3L

[cRiPpLe_rOoStEr]

Originally Posted by Isaac Zachary

It seems a lot of folks think even the classic 7.3:1 is too much, and will lower the CR down to 6.5:1 or around there.

An experienced journalist and former race driver from my country, Douglas Mendonça, recently mentioned some drivers going as high as 16:1 on ethanol. Obviously the carburettors were modded, with considerably larger jets.