Take a guess at what i have. i am curious at what you guys say???

let me know if i should rerecord it with a gopro

 

^^sounds like cherry bombs or something...sorry man but that sounds like total crap

 

i am assuming ur refering to the quality of the mp3 right?

 

no i am not. not trying to be a total jerk, but that sounds like a raggedy old pulp wood truck

 

^ I have to agree......maybe it's a really bad recording, but it sounds like crap.

What mufflers and crossover are you running?

 

Sounds like a Flowmaster 80 series to me...

 

To me it looks like stock. It has no fancy Y pipe, it runs along the stock rout and the hangers, and it has the pipe for the AIR system. No cat. Duel outlet. Thats the only part i am questionable abt its curcular but angled cut. So it's pointy. Ohh and it's completely rusty. I almost lost the back half, lol. Good think I fixed it before it happened.
I just wanted to see what u guys thought, I want to replace the whole stystem from headers back, but i mean right now it doesn't sound that horrible in person.
I am down to magnaflow, hooker, or the really expensive GMMG chambered. borla is really cool but too loud, especially for autocross, 89db or less. actually can you adjust it to be much quieter, close to stock?? i cant seem to find any vids of it being much quieter, correct me if i am wrong...
Not sure which headers to go with each system yet. Is there a set of shorties or midies that perform and sound the same as a set of long tubes? I am defiantly leaning more towards magnaflow, after reading some. I want it to be quiet when I don't step on it (like windows closed crusing) but when I do i want it to sound good and also idle like a bigblock from the 60s. I could do a cut out......
Don't need a cat or air system. If the parts are resonably priced maybe on higher side I'll go for it but really expensive No plus it reduces what I can do later on.

 

Has anybody routed a 3" system over the axle I'd like to know if it's been done before I try. I really like the sound of my car just don't like the echo I get from the exhaust being under the car

 

And djdsails do a chambered setup they sound amazing I love mine but I just bought two mufflers from sweet thunder mufflers and built my setup

 

A 3" pipe will go over the axle.
I have summits chambered exhaust in the stock position with duel tips. I put a classic chambered the short one, 25" I think. Where the cat is suppose to go. It sounds really good. Much quieter at the low rpms. The only rpm where it makes the most noise is 1500rpm. That's the only rpm where it didn't get quieter. The muffler like amplifies the sound rather dampen it.
Overall the system has really good sound throty and low grumble.

 

i am having the hardest time finding a shop here in iowa that will do true due exhaust on my 91 rs with a 305 tbi, whats the best way to get it done? like the routing of the pipe? I'm throwing in the towel and doing this my self with a family friend and his pipe bender, i want it out the back, get back to me soon! thanks!

 

It's not the easiest thing to accomplish and there are a lot a variables to consider.
What are your exhaust requirements from a performance point of view.
Short or long headers.
Diameter of exhaust pipe.
Manual or automatic transmission.
Catalytic convertor(s).
Muffler choice and location.
The best advice is to cruise through all the pictures that have been posted regarding peoples setups. Find something you like and try to copy it.
There are literally hundreds of pictures to look through. Some of them are very professional, others are very budget orientated. One of them is bound to suit your project.

 

ill run either 2.25 or 2.5 pipe, no cats, flow master 10s after the axle, auto tranny, and right now no headers, but will be putting on chrome shorties depending on how much some1 is going to charge to put them on, or ill put them on my self if its not a week long job of busting bolts. it has 153,000 miles. just awaiting my checking account to allow me to have my 383 put in and my new built tranny and new rear end and drive shaft. but i hear true duals will decrease my power? i have 150 right now and wanting to ramp it up to 200 for time being.

 

i like loud cackly exhaust but it has to have some throaty noise because its a car lol i heard a youtube video of a camaro witha 305 and true duals with flow master 10s and idk what size exhaust but it had the perfect sound i was looking for but i dont want to lose too much power, im buying a chip jet stage 2, headers, exhaust, and making own cold air intake but idk how much hp that will add, any guesses?

 

For your current horsepower target (200) one of the short style header assemblies complete with y-pipe and any of the "cat back" systems will meet your needs. Keep in mind this isn't a dual exhaust but this type of arrangement has met the demands of many higher horsepower vehicles.
If you want to meet the demands of your 383 then there are several options, the simplest of which is the previously described short header/single (3")exhaust or at the other end of the scale is a long tube header with a home built y-pipe that feeds into a single exhaust to a muffler located in the stock location or expanding on that, true duals (your original request) which by all accounts takes a fair bit of fabricating, bending and welding.
Again, there are a lot of pictures available. As they say, a picture is worth a thousand words.

 

Being that the sound of the exhaust is a subjective thing (to each his own so to speak) I can't say one way or another as to what muffler to use. Like the exhaust design, there are quite a few sound clips with decriptions attached so you can judge for yourself.
You will absolutely and in no way "lose power" with a performance exhaust. Even the most modest of engines will benefit from a better breathing sustem. All of the mods you mention are all positive moves towards better performance and efficiency. Properly done, you'll probably see a gain in mpg too.

 

but will i lose power with the duals? and if i run single it wont have a cat or muffler, right now it has a cat, 2.5 pipe and then ys out into duals over axle with no muffler and its too quiet, i want something thats going to roar through town and let people know im around. watch this video and then tell me what you think just go to the 1:00 mark thats the sound i want

 

or this video, i believe to be the same car

 

You won't lose power with duals. Ever.
No muffler? Is that a typo? Not loud enough? Nothing will be louder than no muffler.
If it were me and I wanted to be as loud as possible (with a muffler), I'd go for some long tube (or mid length) headers and hang a couple of glass pack mufflers off the end of them.
That'll be LOUD! Cheap too with very little fabrication. When the time comes for your 383, you can step up with a full dual exhaust over the axle if you choose to.
Below are a couple of dual arrangements I've come across. Short tube and long tube styles.

 

I bet THIS is LOUD!

 

yea those pics are of duals but they all have after market crossmembers under the car the make the exhaust fit. my car is 100 percent stock right now and i need to beef up this 305 until i can put a new drivetrain under her

 

Yea like i said right now i have the stock cat with 2.5 exhaust to a y pipe that was done cheap and most the exhaust comes out one side, when i stand on it you can hear the motor over the exhaust, thats some **** poor exhaust so i want to run true duals not a y pipe

 

I spoke to a member here who has an auto and true duals, one of the guys on this thread actually further down on the list. He says that he sacrificed alot of ground clearance with his true duals and an auto. With an auto, the best way to go, unless you "must have true duals" is a 3" catback with shorties and a y-pipe. Dyno don's headers or Hooker 2055's are the preferred choices. A single 3" catback loses something like 5CFM of flow compared to true duals, so you're losing nothing, and keeping your ground clearance. I myself will always run a single 3" catback unless I somehow get up over 400hp which I doubt I'll ever do in this car.

 

single 4"never let me down and tons of ground clearance. been 6.20's 1/8 mile.

 

GM built a dual 3" over the axle system on a prototype bigblock 3rdgen car they built many years ago.

 

My single 3" goes over my axle. It fits just fine. Stock location.

 

I am certain many here would like to see pictures of this!

 

Sorry for the krappy scan and bad pix but it was a old black and white story.
Anyway, GMs dual 3" in a bigblock 3rdgen.

 

Wow.
What year is that article?

 

Its someplace around 89 because one of the cars in it is brand new with the window sticker in it.
Its a new 89 formula 350 than Lingenfelter built in 2weeks and brought it to the test.

 

pretty cool article.

 

Here is my start of true duals. its the dynamax 2.25" set up

 

heres a more of mine.

 

Shorty Flowtech Headers into 2.5" true duals Into Thrush Dual chamber Welded Mufflers sounds Awesome i recommend it to anyone on here with a smallblock. (i recently put turndowns on as well to cut down the highway drone not in that photo)

 

All that work and you didn't spring for band clamps?

Band clamps 10x better than C clamps.

 

is that a red driveshaft? i prefer band clamps myself, but they are triple the price. all depends on what you are aiming towards.

 

Any shots of the pipes over the axle? How about the mufflers?

 

I know it's not pretty "yet" but I haven't seen one done like this , not done with the back yet, almost though fits like a charm and doesn't hang any lower then the stock exhaust

 

ive seen it here before and on ls1tech too. dynomax made a kit of some sort to do this, but it needed modification.

 

mine...a little different...we notched the frame rails with 4" pipe and ran s bends sideways through to put the mufflers off to the side. they are hooker 2210s to 3" s bends into 3.5" dyntatech mufflers

 

any pics of the notched area? looks pretty good!

 

Its not the prettiest looking but it sure does fit nice

 

More

 

Thats That!

 

are those 2 stock intermediate pipes?

 

Yes, right off a forth gen camaro.

 

that looks pretty great. i was trying to round up 2 i-pipes to do just that before i decided on doing my big single.

 

Thank you, It was worth it , it sounds really good ,and I had a bigger issue getting the tips where I wanted them more then building the exhaust it's self . But I'm really happy with how it came out .

 

 

ok I revised the mufflers after fitting the rear ..