question about sound/after head swap

[Project 77]

I figured I'd ask you fox guys since I don;t know anyone with aluminum heads on a II. The car is a stockk 77 cobra with a 302, and I just bought set or RPM performer heads, headers, intake and 650 carb. You guys who run alum. heads notice a difffrence in sound through the exhaust? I was told alum heads make a car louder, any truth to this? I have 2 weeks to pick out what mufflers i'm going to run.

 

[5spd GT]

It really isn't the affect of the aluminum per say, but aluminum heads are usually more 'performancy' and have larger valves, ports, and with a bigger cam allows more air in the combustion chamber, which makes it louder out the tailpipes

More air, more fuel ='s more 'bang' ='s louder car...

 

[payupsucka]

it gets noticably louder thats for sure

 

[thumper460]

also the add'l HP will raise the exhaust note... cool??

Just me...................................

Thumper