Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - Sbc firing order changes?
View Single Post
  #3 (permalink)  
Old 02-06-2012, 07:54 AM
cobalt327's Avatar
cobalt327 cobalt327 is offline
Last wiki edit: Intake manifold
Last journal entry: 1980 Malibu Wagon
Last photo:
Join Date: Mar 2009
Posts: 5,031
Wiki Edits: 1616

Thanks: 128
Thanked 616 Times in 565 Posts
My understanding is the firing order of a 90 V8 compromise between breathing and torsional stress. There are three that are most often used:

1-8-4-3-6-5-7-2 (Mopar, Chevy, Ford pre-~'70)
1-8-7-3-6-5-4-2 ("4/7 swap")
1-8-7-2-6-5-4-3 (Ford ~'70-up, Chev LS)

Regardless of which of these firing orders are used, there will be two cylinders on each bank firing consecutively and once the two cylinders will be adjacent cylinders that fire consecutively.

I hope Old Bogie or Techinspector1 notices this thread and fills in the many blanks/details.