As reputed engine builder and tuner, John Lingenfelter, once said

Running an engine on the edge of detonation, will always make more power!

1967 Dart GTS 426 Gen III Hemi
1968 Hemi Cuda 572 SS/AH Clone
1988 Chrysler LeBaron Coupe S/S
2003 Dodge Ram 1500 4dr SLT lowered
2012 Ram 1500 2wd Lowered
1970-1/2 Camaro Z-28
1974 VW Karman-Ghia