Exhuast Note

[t/a 6.6]

So I have been thinking about the exhuast note of an engine. I have begun to wounder about why it is that the 3.8 v6 has a nice low rumble (kinda like a mini v8) where as the 4.0 v6 doesn't. It would seem to me that the 4.0 should have the deeper, meater exhuast note, but yet this is not so. (I might be alone in thinking that the 3.8 sounds better than the 4.0)
So I was woundering if anyone else had looked into/wounder about this.
I tried looking up the diffrencence in the motor to see if i could figure it out.

The essex is a 90 v6, the cologne(4.0) is a 60 v6.

then I looked at the relation ship to bore and stroke in the essex vs the 4.0. The essex is closer to being a squared off motor.

Then i looked at the cam specs, the 3.8 is slightly more "agressive"

The fireing orders are the same,
the number of valves are the same,
The essex has more horsepower than the 4.0

I also have been doing comparissons on the same exhuast system (diameter pipes, and mufflers ext) on both engines, and the essex just sounds better accrosed the board (again just my opinion).

Does anyone know which of these is related more to the exhuast note than the other.

[JR Tigerstar]

Originally Posted by t/a 6.6

....
I also have been doing comparissons on the same exhuast system (diameter pipes, and mufflers ext)
on both engines, and the essex just sounds better accrosed the board (again just my opinion).

The same exhaust system ????
Did you test each engine in one certain test vehicle?

The point I'm trying to make is
that the lay-out of the exhaust system can make a difference in sound.

[t/a 6.6]

Originally Posted by JR Tigerstar

The same exhaust system ????
Did you test each engine in one certain test vehicle?

The point I'm trying to make is
that the lay-out of the exhaust system can make a difference in sound.

Oh i am sorry, i forgot to mention that. I used my sisters mustang with the 3.8 and my cousins with the 2005. I gues there is probably some change in the exhuast lay out. But I don't think there would be too much. They both needed/wanted a new exhuast system, so i figured time for a test.

[JR Tigerstar]

Originally Posted by t/a 6.6

Oh i am sorry, i forgot to mention that.
I used my sisters mustang with the 3.8

What year is your sisters Mustang?

Originally Posted by t/a 6.6

and my cousins with the 2005.

Your cousins what??? Vehicle??? Engine???
What year, make & model is your cousins vehicle?

[t/a 6.6]

Originally Posted by JR Tigerstar

What year is your sisters Mustang?


Your cousins what??? Vehicle??? Engine???
What year, make & model is your cousins vehicle?

A 2005 mustang with the 4.0 and a 1999 mustang with the 3.8. I know they are not too close in age, but this is what i have to work with,

I also figured that sense the 4.6 v8 sounds almost exactly the same in the 1999 mustang as it does in the 05, if the 3.8 was in the new body style it would sound roughly the same.