Came across this interesting article about firing orders.
https://www.lsenginediy.com/gm-gen-iii-ls-pcmecm-change-firing-order/
It seems to indicate you can just swap the firing order. Surely this is the decision of the crank and cam? Unless the teo cylinders you are swapping are at the same point in the cycle surely you can't change the firing order.
Is there an advantage of swapping? just too many questions on this....
In a car park around 20 years ago I heard someone say to someone else on his mustang with a windsor engine said he swapped two leads, thinking 4 and 7(was a long time ago) for a different sound.
https://www.lsenginediy.com/gm-gen-iii-ls-pcmecm-change-firing-order/
It seems to indicate you can just swap the firing order. Surely this is the decision of the crank and cam? Unless the teo cylinders you are swapping are at the same point in the cycle surely you can't change the firing order.
The firing order for the Gen I small-block engine is 1-8- 4-3-6-5-7-2. The firing order for the LSseries engines is 1-8-7-2-6-5-4-3. Notice that cylinders 4 and 7 have swapped, and cylinders 3 and 2 have swapped. When you compare this PCM’s fuel injector wiring diagrams for the Gen I small-block with the LS-series engines, you see something interesting: General Motors simply swapped injector outputs 4 and 7, and 3 and 2 within the engine wire harness to address the firing order change.
Is there an advantage of swapping? just too many questions on this....
In a car park around 20 years ago I heard someone say to someone else on his mustang with a windsor engine said he swapped two leads, thinking 4 and 7(was a long time ago) for a different sound.