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Muffleration :)


Guest Anonymous

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Guest tom sixbey

yeah... - however, if it's not set up exactly right they sound nasty... - If you listen to the genereal lee's exhaust on the dukes of hazard, that is nothing more than 30 inch glasspacks behind a stock 440, and everybody i know thinks it is the best sounding exhaust they've heard...

 

The one thing i dont like about them is that jake-brake rattle they make when you let off the gas, but i think that is the fault of not having a crossover on a dual exhaust system.. I'm going to try out an x-pipe crossover with glasspacks and resonator tips... - hopefully that will smooth the exhaust note out some and quiet it down while still giving me that "open header" tone...

 

any suggestions?

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Guest Anonymous

Sorry 'bout the misunderstanding Ross, so what do you guys think would be best to use for the resonators at the 2.5" piping? Turbo-style or Straight-thru?

 

Here is a list of cfms I found for different mufflers. Dynomax have all their mufflers rated in their catalog, but some of their numbers seem pretty crazy to me... A regular 3" pipe should flow 820-850cfms, and they rate their 3" straightthrus at 2000cfm! Might just be that they've done their ratings at a higher temperature? I dunno Anyways, enjoy...

 

MODEL Flow Rate Muffler Inlet Size

 

@ 20.3" H2O

 

+ Edelbrock 5501 492 scfm 2.25"

$ Flowmaster 42440 483 scfm 2.25"

Race Magnum Welded 17216 711 scfm 2.25"

 

+ Edelbrock 5511 579 scfm 2.50"

$ Flowmaster 42540 352 scfm 2.50"

Ultra-Flo SS 17263 1133 scfm 2.50"

Race Magnum Welded 17218 1000 scfm 2.50"

# Borla 40600 836 scfm 2.50"

 

+ Edelbrock 5505 708 scfm 3.00"

$ Flowmaster 43040 392 scfm 3.00"

Ultra-Flo SS 17296 2200 scfm 3.00"

Race Magnum Welded 17220 2200 scfm 3.00"

# Borla 40450 1400 scfm 3.00"

# Borla 40575 1100 scfm 3.00"

 

@ Edelbrock 5535 562 scfm 3.50"

$ Flowmaster 435409 576 scfm 3.50"

Ultra-Flo SS 17268 2200 scfm 3.50"

Race Magnum Welded 17224 2200 scfm 3.50"

# Borla 40615 854 scfm 3.50"

 

@ Edelbrock 5537 1400 scfm 4.00"

* Flowmaster 54040-10 634 scfm 4.00"

Race Magnum Welded 17225 2600 scfm 4.00"

# Borla 40741 1450 scfm 4.00"

 

+ Edelbrock General Application Series

 

@ Edelbrock Victor Series Race

$ Flowmaster 40 Series ( 2 Chamber)

* Flowmaster Delta Force Race Series

# Borla XR-1 Racing Series (Round or Oval)

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Guest Glenn Parker

I went to a muffler shop and got a 3" resonator 12" long. Outside dia. is 4" I cut 4" out of the center to make it 8" over all. I then cut 6" of the back of the 2 into 1 flowmaster pipe and welded them together. Now the pipes merge together and go into the resonator and its only 2" longer than the original 2 to 1 pipe. the 3" pipe winds its way to a dynamax turbo 3". it sounds great! No annoying sounds in the car and not loud. Its quiet enough that I now want to quiet my Carter fuel pump down.

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Guest Anonymous

check this link out... Very informative site

They've also got a 2 into 1 muffler, but its too big for our purposes (9" in diameter!)

 

http://www.castheads.com/exhaust/exhaust.htm

 

 

all the juicy stuff is in the second half of the page. Turns out that a single exhaust system is not only cheaper, quieter, and lighter than duals, but apparently, it can be more powerful too!

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