I think it has to do with preventing crossfire of wires and a more even distribution of the pressure on the crank.

 

Jeremy-
I used the '351' cam build on my Reed. It helps even distribution and better 'balance' through the core of the engine.

There is definitely a benefit to the different firing order for higher revving/HP/Torque engines. I think newer 302 Builds use it because the technology proved it to be a better firing order than the original 60s specs.

Snell

 

The "1-3" firing order was to reduce the load on #1 main bearing....

 

I think it has to do with preventing crossfire of wires and a more even distribution of the pressure on the crank.

I don't think that affects that Pete. If you look, old vs. new; the old has 7&8 firing & the new has 5&6 firing adjacent to each other.

So I would assume the possibility of inductive crossfire would still be there if those 2 wires were to closely parallel each other. Much as the old 7 & 8 scenario. :shrug:

 

Thanks Snell.

The "1-3" firing order was to reduce the load on #1 main bearing....

And that's pretty much the only + ?

Oh and thank you again for that sport mirror washer! it was greatly appreciated.

 

Damn, missed that all together.....

 

Of course the new firing order places 4 & 8 firing in sequence, loading the rear main instead of the front...

I'm sure if you're at 99.9%, looking for that extra .1%, there's an advantage... but for common folk, it's 6 of one, a half-dozen of the other. :shrug: Nothing worth over-analyzing, IMO.

 

I found this:

"
The reason for this difference in the 1:1 STD-vs-HO is all in the camshaft timing, lift, and duration. Cylinders 5 and 4 , and cylinders 3 and 7 fire really close together as matched pairs. When the H.O. version was cooked up, a number of customers complained of a rough idle. Even in the heyday of factory hot-rods, a lot of folks wanted smooth idle.

Ford engineers quickly worked this out, and found that swapping cylinders 5-4 with 3-7 got rid of this, thus eliminating a customer satisfaction problem.

No overall performance difference can be felt with either wiring order. No kidding.

edit: oh by the way, if you look at V-8 firing orders overall you will find that Ford's cylinders physically fire in the same order as GM and Chrysler's, Ford just numbers the cylinders differently that's all."


BTW, my cam has the 351 F.O., Dema Elgin suggested it for a "race" engine.

 

So you are running the 1-3-7-2-6-5-4-8 firing order Mark ?

 

So you are running the 1-3-7-2-6-5-4-8 firing order Mark ?

Teeeeeeeen- fo

 

Cool; thanks.