[estep455]

Originally Posted by Tom Vaught

In one word, Yes.

Say you had a clockwise pattern on the passenger side collector with a 10:00, 2:00, 4:00, & 8:00 clock pattern.

Stock Pontiac firing order clocking would be: (Assuming the pattern started at 2:00)
Cylinder #2 would be at 2:00
Cylinder #8 would be at 4:00
Cylinder #4 would be at 8:00
Cylinder #6 would be at 10:00


Say you had a COUNTER clockwise pattern on the drivers side collector with a 10:00, 2:00, 4:00, & 8:00 pattern.

Stock Pontiac firing order clocking would be: (Assuming the pattern started at 10:00)
Cylinder #1 would be at 10:00
Cylinder #3 would be at 8:00
Cylinder #5 would be at 4:00
Cylinder #7 would be at 2:00


Again you had a clockwise pattern on the passenger side collector with a 10:00, 2:00, 4:00, & 8:00 clock pattern.

Ford/LS firing order clocking would be: (Assuming the pattern started at 2:00)
Cylinder #8 would be at 2:00
Cylinder #2 would be at 4:00
Cylinder #6 would be at 8:00
Cylinder #4 would be at 10:00


Again you had a COUNTER clockwise pattern on the drivers side collector with a 10:00, 2:00, 4:00, & 8:00 pattern.

Ford/LS firing order clocking would be: (Assuming the pattern started at 10:00)
Cylinder #1 would be at 10:00
Cylinder #7 would be at 8:00
Cylinder #5 would be at 4:00
Cylinder #3 would be at 2:00

Tom Vaught

good info thanks tom