Quote:
Originally Posted by Nu66et
My understanding was the pre crossflow sounded better because of the siamese 3-4 cylinder port. Maybe if you ran a balance pipe between the 3-4 primaries on a crossflow you could replicate it.
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You know, I think you are on to something there. The way the exhaust manifold really does not have an effective separation between 3 and 4, this would result in 2 and 4 going off in a seeming side by side 120 sequence as if 2 and 3 went in sequence, giving a rumble.
It is easier to find full sequential firing separation examples on a V8 with 180* headers vs conventionally grouped exhaust.
Keep in mind pipe cylinder displacement, pipe diameters, pulse separation in degrees, muffler types, resonator types, valve timing all play a role in overall sound quality or lack of.
Here is a V8 with 180* headers. This gives full 180* firing pulse separation for each bank and produces the symphonic sound:
Here is the typical V8 with 2 instances of non separation of firing sequences per bank firing. Nice rumble. No symphony.
Without knowing the exact specks of each engine I would guess the race car with the 180* headers is in a more modified state of tune. Just looking at the tiny exhaust on the Mustang tells me it doesn't have a whole lot under the hood, yet gives the sound of the tougher hombre.