cam firing order swap

Maybe he is talking about changing the firing order on an early 302 to a late 302 with a 351w firing order?
It isn't worth a hp gain there.
If it could be done on a C, I wouldn't think it would gain any hp, just change the loadings on the bearings.

Bill,

As far as I know, this is a small block Chevy thing, its a 4-7 swap. The buzz is you make more bhp with the firing order swap. Comp Cams is grinding cams with the new firing order. Great way to increase cam sales, if nothing else.

I've not heard the same thing about the Ford motors. They make enough bhp already.

Your friend on the DTBB

There was an article about this in a recent Hot Rod or Car Craft magazine. As I recall the gains were minimal, not worth the effort.

I've seen it many times on small block Fords, adopting a 351 Windsor/HO firing order on a 15426378 motor. In theory, it reduces the stress on the crank by negating 2 adjacent cyliners from firing consecutively (7/8). Like my dad once said, you can theorize in one hand, $hit in the other, and see which fills up fastest. Not sure what that has to do with changing the firing order, but it seemed appropriate to this thread. LOL..... take care

Ummm, typing with the non-shitty hand, surely the Windsor firing order of 13726548 has two adjacent cylinders firing together too 6/5?

Julian

Julian, you're on the right track.

The problem with the older firing order was 1 - 5, the force of combustion acts on the same connecting rod journal one after the other. The later firing order moves the problem to the rear of the motor, to 4 - 8. There is supposed to be an advantage to that.

But swapping one Windsor firing order for another is no big deal really. Like John said, enthusiasts have done it for years.

The hoopla about the SBC firing order is a new thing, the latest big news, go spend your money on a new cam. While the Windsor firing issue is supposed to improve the durability of the motor, the new Chevy firing order is supposed to make more bhp. Comp Cams is grinding new cams. I have no idea if any of the other cam makers are do so as well. I'm sure thats what Bill had referred to.

Your friend on the DTBB

quote:

Originally posted by 4NFORD:
There was an article about this in a recent Hot Rod or Car Craft magazine. As I recall the gains were minimal, not worth the effort.

And much disputed. Not new.