[DeTomaso] Techno question: 4/7 Swap Cams for 351Cs

[SOBill at aol.com]

The Ford cylinders are numbered:
 
Front Passenger Side 1,2,3,4
Front Driver Side ...... 5,6,7,8
 
The Chevy cylinders are numbered:
 
Front Passenger Side 2,4,6,8
Front Driver Side ...... 1,3,5,7
 
The March 2006 Hot Rod Magazine had an article and dyno test of a  Chevy with 
both types of cams.
 
When Ford changed the V8 firing order for the 351 and 5.0 engines,  they 
implemented the "4/7 swap."
 
Chevy implemented this same firing order change on the Gen lll and  lV 
(LS-series) engines. The Chevy engineers said the motivation for this change  was to 
equalize the peak loading on the #2 and #4 main bearings. #2  loading went up 
a little and #4 came down a little. Every little bit  helps.
 
SOBill  Taylor
sobill at aol.com