/6 Exhaust: Dual or single? Your thoughts

Killer6 said

Actually in this case, he would have a double split, and the second would only have an effect on sound & velocity......if the second split is done efficiently................
Anywho.............until Deemo gets his headers, all the 6-2-1 talk is pointless, MORE important is that he is sure to pick headers that can accommodate a change to a 225
if he decides to switch, & there aren't a ton of choices if he sticks w/the 170.

Click to expand...

Lets examine the slant six (or any American six's firing order) for that matter related to exhaust pulses and scavenging.

1-5-3-6-2-4 is the firing order for every American made inline six........unless some of the new ones are different.

This means that a slant with a 6 into 2 header is perfect for scavenging.

Why? Lets split the front three cylinders and the rear three.

Keep in mind, the firing order, 1-5-3-6-2-4.

See what's going on here? The firing order alternates between the front three and rear three every time a cylinder fires. This means with every firing of a cylinder, exhaust will be scavenged from the opposite cylinder on "the other three".

So, your "theory" is not optimal. This is why a good 6 into two header and into one large exhaust pipe works best here and duals do not.