i have an 86 z 28. i just put a brand new motor in, with tons of goodies.

forged crank, rods, pistons
350 .040 over = 356
10.8:1 total compression
port polished aluminum heads off a 90 vette.
edelbrock rpm manifold with a rochester quadra jet atop
crane cams 502 512 lift 284 duration

for exhaust:
headman headers 1 5/8 primaries 3 in collector
3in down pipe(headman) catco high flow cat (3in)
3in dynomax catback exhaust. with 2.5in tails

my problem is the exhaust is not loud... not like a flowmaster sound. is there anything i can do to make it alittle louder. it does have a nice mellow and authoritative sound but just not loud.

 

Get rid of the dynomax. Plain and simple.

 

Amen....You want the sound of a flowmaster, get a flowmaster. YOu want really loud, ditch the muffler all together. I have no muffler right now and it is loud, but I plan on getting rid of the cat and bolting a 40 series in the place of the cat to give it a better sound....don't like the sh!tty popping that the cat makes.
Lc

 

get a cutout, they rock on 350 and larger engines! (never heard one on a 305 yet).

At full throttle, mine sounds like a nascar, at 1/2 throttle, it has a real throaty sound, and at idle, it sounds the same only louder. Thats with edelbrock headers, mystery heads, and dual cats.

it's not really loud at idle, probably because I left the cats on. But as soon as I get past about 1/4 throttle, it gets real loud real quick Trust me, with headers and cutouts (or just one), you'll get some looks! People all the time ask me what engine I got, and "I bet thats fast!". all the shops I go to, the guy who pulls the car in the stall always revs the engine with a big grin on their face it's totaly fun

On stock engines (with stock headers), it just usualy sounds loud and raspy. but with headers, heads, (and your cam) it should sound pretty wicked

 

could you recommend a cutout? and ive heard of electric cutouts are those good too? where would i install it and how hard is it install?

 

I didn't do the install it myself because I don't have a welder (or know how to use one). Basicly, you just weld up the cutout pipe into the section of exhaust you want, bolt on the electric cutout mechanism to the end of the cutout pipe, then run the wire up into the car (through a hole in the floorboards above the tranny, I think). Then run a line to a wire from the battery.

Thats is, I believe. But like I said, I didn't install it because I don't have a welder.

I should have gotten just the $30 cutout pipe, and not spend the $100 or so on the electric mechanism... I havn't closed it in like 3 months. I'm sure I'll want to close it sometime... like if I ever get a girl friend

 

I don't have cut-outs, but I have straight pipes, same thing really. I have an L03 and it is pretty impressive as far as noisy goes. As far as tone.....I think a cat choking on a hair ball sounds better. If I were to do it again I would have gotten headers first and then the pipes. I am gonna ditch the cat and put a 40 series in place of it sometime soon to give it a better tone....then I am getting headers and possibly a nicer cam. It sounds wonderful at idle though, that is the one good thing about its tone I like. And it's music to my ears compared to those fart cans imports have
Lc