My exhaust setup on my 305 tbi is this : TES headers (not sure of size, but the ones for the 350), a random tech. cat, and 3" flowmaster american thunder catback. I have been harassed here and there about how loud it is, but because it's perfectly legal in every way ( i carry around the paperwork with me ) i've never been fined. The issue is this, im ripping the whole setup off to put on my 89 z28 with a 350tpi, my question is how much louder is this gonna be going from a 305 to a 350, obviously this isn't that big of a deal, but im just wondering if anyone was in a simular situation and knew... thanks, josh.

 

it shouldn't be much louder it more or less will have a different tone. being your raising the cubic inches the tone will probably be deeper making the 5.0 sound like a whiney motor

 

it will sound different. theres a big difference between a TBI and TPI setup. TBI doesn't flow as well as the TPI engines. more air in = more air out = different tone and possibly louder exaust.

 

that is something i couldn't tell you i would think because of the change in flow it would sound deeper with the TPI. try looking at the sound board at the different exausts

 

what are you talking about?

 

the same exaust from a TBI on a TPI engine will sound different. i promise you

 

He is right, but not quite for that reason(s)

 

heh, i have problems typing what i mean. even if i get it right, others have no idea what i'm saying lol