exhaust sound..

[Arkgl01]

I have a pretty much stock 383 with headers in my 69. I went down and had 2 1/2 pipe with flowmaster super 44s. I was wanting a nice deep sound that would turn your head. I didnt get that its not really loud at all. I want it to sound like a muscle car. The guy said go to 3" pipe and it would help. Also should I have gone original 40s?  I am not worried about how loud just want it deep as possible. I had bullets and they werent deep at all! Thanks for any help

Mark

[Ghoste]

Going to 3 inch will almost surely kill performance in a 383.  Do you want sound at that expense?
FWIW, I'd lose the Flowmasters and get Dyno Max but I know the Flowmasters seem to be all the rage.

[Arkgl01]

I dont care what brand I just want a deep musclecar sound. I agree that motor does not need 3" exhaust..

[ray230]

Sound is very subjective. What suits one is terrible to another. After a lot of trial and error $$, this set up is what I was looking for I've got a '68 with a '73 400, comp cam, Schumacher tri-y headers, 2.5 in., crossover, flowmaster 40s. Loud and deep. Don't plan on carrying on a conversation or listening to the radio between 1800 and 2200 rpm! At 2500 it mellows to a perrrrfect tune down the road. 

[firefighter3931]

I'm not a flowmaster fan....too much resonance and drone. It will eventually drive you nuts once the novelty wears off. Flowbastards are very restrictive and will hurt top end performance....if that matters at all to you.

My favorite is the Dynomax UltraFlow which is a straight-thru design and very high flowing. Nice rumble at idle and excellent roar when you open up the throttle. It's the only muffler I personally would ever run on any of my cars. 



Ron

[Charger-Bodie]

I'm not a flowmaster fan....too much resonance and drone. It will eventually drive you nuts once the novelty wears off. Flowbastards are very restrictive and will hurt top end performance....if that matters at all to you.

My favorite is the Dynomax UltraFlow which is a straight-thru design and very high flowing. Nice rumble at idle and excellent roar when you open up the throttle. It's the only muffler I personally would ever run on any of my cars. 



Ron

Very true words!! I agree 100%

[Hemidog]

I'm not a flowmaster fan....too much resonance and drone. It will eventually drive you nuts once the novelty wears off. Flowbastards are very restrictive and will hurt top end performance....if that matters at all to you.

My favorite is the Dynomax UltraFlow which is a straight-thru design and very high flowing. Nice rumble at idle and excellent roar when you open up the throttle. It's the only muffler I personally would ever run on any of my cars. 



Ron

Very true words!! I agree 100%

the sound is great!

[Just 6T9 CHGR]

How about a nice stock High-Flow Hemi muffler from Accurate LTD?

http://www.youtube.com/watch?v=jp-VdYrBsJQ

[dpm68]

Not to hijack, but what about 3'' pipes on a 400hp+  440 w/4spd? Will they rob the power also?

[mikepmcs]

I think you would still want a little back pressure with that set up.  Low end would suffer IMO.

[dpm68]

Well phooey! They're already on there, I just haven't dropped the 440 in yet.

[mikepmcs]

On another note, I'm not an engine expert so I really don't know the answer.  I just assume that it will need more back pressure.  I'm sure the engine gods will speak soon.

And one more vote for Ultraflows here.

[green69rt]

Not to hijack, but what about 3'' pipes on a 400hp+  440 w/4spd? Will they rob the power also?

I've looked at a lot of these threads on exhaust systems.  Here's my take,  the sound is in the mufflers, you want a lot of rumble get the flowmasters.  You want performance then you need to think about pipe diameter, just a little.  More important it the head pipes(headers), heads, intake.  2.5 inches is probably good for anything up to about 500HP at 6000rpm (probably more.)  If you want more then go to 3"  Think about TOTAL flow, 3" pipes do nothing for an engine that has poor heads, head pipes or intake.  Everyone goes for the 3" pipes now because "it's the thing to do". 

[dpm68]

What constitutes as "poor" heads? Stock? Thats what I have. Mark: If your 383 is stock, then how many ponies is it pushing - 335 or so? Mine will have about 400+ when done, and my car came with 3" and a pair of no-name, as far as I can tell, turbo-type mufflers. I really didn't think too much about the exhaust system until now. I just thought it might set off car alarms in better areas of town!:icon_smile_big: So again, (Mike) what are "poor" heads? It does have 2" headers. Thanks!

[firefighter3931]

With a 400hp 440 the 2in headers and 3in exhaust are a little on the large side. It will lose some torque but it's not worth changing everything...inmo 

If you wanted to make some type of improvement to compensate for the oversized pipes....adding an X-Pipe would be worth the effort. That alone should get back most of the torque that the larger pipes are robbing. 


Ron

[dpm68]

Thanks Ron, I will do just that...soon. Thanks for letting me share this thread, Mark.

[green69rt]

With a 400hp 440 the 2in headers and 3in exhaust are a little on the large side. It will lose some torque but it's not worth changing everything...inmo 

If you wanted to make some type of improvement to compensate for the oversized pipes....adding an X-Pipe would be worth the effort. That alone should get back most of the torque that the larger pipes are robbing. 


Ron

Agree with Ron, not worth changing.  As to what is "poor head"?  It's relative.  Older stock heads may have a poor design or just small valves.  You can do a lot to your existing heads to help them, New valves with correct grind of the seat angle, matching the ports to the intake/exhaust ( don't forget the gaskets need to match.)  Other things. 

[tan top]

How about a nice stock High-Flow Hemi muffler from Accurate LTD?

http://www.youtube.com/watch?v=jp-VdYrBsJQ

sounds  real good   

[69bronzeT5]

I'm with Ron, I like the Dynomax UltraFlows. However, my Duster came with brand new Flowmasters so I'll be running that on it.

[jar1292]

my set up is 3 inch from the headers flowmaster muffs the cross over hooker compitition headers with indy ez heads 440 stroked to 540. i dont have have the baby up and running yet but what will that give me sound and performance? were not restricted by emmisions and every other vehicle ive ownd i have straight piped for the sound from my 1600 cc suzuki, 390 ford,and 350 chev. I do all my own work and the hole town loves it! well not the local cops and old folks. ive even done 4 of my friends exaust on there trucks. the cars gunna stay dueled out but thats where my design was unique was in the two to one conversion should i break tradition and leave the muffs?