TDR":200ghvnu said:
Is it really possible to get one of our FoMoCo 6's to sound like either the Jag or Beemer?
Seems like everybody is focused on the exhaust as the only source of sound on a car. It's not.
A significant amount of sound can come from a vehicle's intake tract, especially if it has a fairly open design and high flow air filters (like K&Ns) or open velocity stacks on an individual runner intake design. The sound that comes from an engine with open stacks or K&Ns on an engine with each cylinder having its own dedicated carb throat is one that differs enormously from the sound you'd get from the same engine running an intake with all its cylinders drawing from a common carb breathing through a stock style air cleaner housing with a pleated paper element.
In other words, take a 6 cylinder Jag and it'll sound
very different with an intake that feeds all of the cylinders off a single 2 barrel and some kind of enclosed American factory air cleaner with a snorkel and a paper element than it will with a trio of side draft Weber DCOEs and open stacks or K&Ns.
A part of the sound you hear comes from things like the valve train, too, though that's less of a factor than the intake.
The point here is that if you want your Ford Inline 6 to sound like a sporty Jag, then you need to duplicate not only the exhaust configuration, but also the intake configuration as best as you are able. That is a bit difficult if you are using a head with an integrally cast log intake manifold, but if you switch to one of Mike's new aluminum heads and go with the side-draft Weber intake, triple 2 barrel side draft throttle bodies with some low-restriction air filters in a wild looking EFI set up, then man, you might just be able to get something pretty close to the sound you are seeking.
Then to complete the sound you need to mount some headers and an exhaust system that uses pipes and mufflers similar to what a souped up vintage Jag might have. I'd look for something as close to a vintage Abarth or Ansa system as I could find. Those things had a sound that was
totally sweet.
One last tip. The old Jag XKEs had some louvers in the hood that were probably there to allow hot engine compartment air to escape, but they also let some of that sweet, sweet intake roar out if they had one of the wilder intake set ups. I don't know if any of you would want to louver the hoods on your old Falcons and Mustangs, however.
