Flowmaster w/o cad.....HELP!

[johnwen1]

I need to know if it's OK to run a flowmaster muffler without the cad converter. A local speed shop owner said that I should replace the original with a high performance one. Is he trying to sell me or what?

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99 QC 3500, Automatic, 3:54 LSD, "Big Ole White Truck", Chrome bed rails, Nerf Bars, Billet aluminum grill and fog light openings, stainless bug shield and eyebrows, billet aluminum "RAM" third brake cover. Amsoiled.
94 2500HD, Auto, 3:54, Banks PowerPack, 108,000 miles and going strong

 

[CumminsAholic]

It's safe, a few guys don't even run a muffler. The only thing you'll be lacking is restriction and that's a good thing. I have a dynomax 4" straight thru race "muffler". #ad

Corey


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1998. 5 2500, 4x4, SB, Red Sport, Agate Interior, Quad Cab, O. H. Console, Auto, 4. 10 LSD, Trailer Tow and Camper Special Packages, Mopar Aluminum Nerf Bars, Spray In Bedliner, Pioneer/Jensen System, 255/85's, Bd Adjustable Preformance Box w/boost module, Boost Elbow, 4" Exhaust Split Into Two 3" w/5" cans, K+N Scotty Style, Exhaust Blanket, Bill K's Valve Body, Mopar Tow Hooks, Factory Fog Lights, Front Bumper Step, 55 watt Back-up Lights, Etc, Etc... .

 

[Forrest]

My experience with Flowmasters on the gassers is they transmit a lot of sound thru the case into the bed. Flowmaster has a series of mufflers to eliminate this, but I don't know how they did it & if the flow is reduced. My vote is to go with the 4" straight thru so many of us are using. Restriction is low. #ad


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Money Sink - 96, 5 speed, TST 380, HX40-16, 300 HP Injectors, Scourge BD 4200rpm Governor kit, McLeod, 4", CATless, straight out back, chrome turn down, ISSPRO Pillar, Delvac 1 & Amsiol, K&N, Mag-Hytec, 3:54, Michelin 235s on Alcoas, Rancho 9000's, Valentine One, Garmin.
Dutchmen 27' 5th Wheel.
GoldWing.

 

[HossDiesel]

you have a caddy on your truck???? all i had was a muffler and res, diesel dont have pollution control, he is trying to snow you, i have a starit pipe but i am thinking of going with the 3in 3 chamber 50 series flow, i called flowmaster and they said it wont hurt the cummins.

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99 quad cab 4x4 5spd 355 gears sandstone color K&N air filter starit pipe spray in bed liner
goose neck ball, autometer boost and egt on a piller mount and an alpine cd player- theres nothig like the smell of Diesel in the morning.

 

[Sky]

I have the 40 Series 4. 5" raceing muffler and I love it. Its not to loud but yet sounds mean and throaty.

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2001 QuadCab,SWB,Auto, 4X4,4" Flowmaster Exhaust, Bosch 275 Injectors, K&N, 33" BFG AT'S... ... .....

 

[My 6 Eats V8's Old File]

I took my 4" 2 chamber off today because I've wondered how much the guy I know that works there said "there is something to be gained by not using a chamber muffler" meant. It got noticeabley more low end with less lag. Top boost even with the valey on is the same, maybe 1 psi higher with the valey on. Egts are the same.
Less lag = less smoke. at least on the bottom end. #ad

I would seriously recomend using a straight through type muffler after this.

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96 4x4, 3. 54 posi, 6. 5"lift, 35" bfg m/t's and 35x14. 5x16. 5 boggers,dual stabalizers, aluminium wheels, sport headlights,billet grill, K/N 0880, NOS, Performance Diesel LPG, BD Pulling/Competition fuel injection pump,370hp marine injectors, ported head, Hx40 w/ 16cm2, 4" exhaust w/ 2 chamber Flomaster, BD copetition auto transmission and torque converter, Kenwood sterio System, Westach 60lb boost/ egt guage with warning light,aluminium bed rail covers,chrome diff covers, 5 foot traction bars,
475hp and 1050lb of torque on #2
530hp and 1140 with bullydog lpg maxed(only 55hp)
590hp and 1200 with lpg and nos
all done in 5th gear with 35's.
have a great day.
Adam

 

[Todd T]

Its good to see you came to your senses, I was floored a few weeks back, when I read you were running one on your truck. #ad


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Todd,
2001 Q-cab SB 4x4 5spd 3. 55's,PowerMax3 adj. , A pillar Boost/EGT,4" turboback exhaust,custom built aluminum airbox W/K&N-RE0860 through the cowl, and more to come...

 

[JMoglia]

there is no converter,just res/muffler,i'm about to lose both,going with duall 4'' stacks woooooweee can't wait,trying to figure out,powder coat or Jet/coat

jdm joe

 

[SmokinJoe]

Originally posted by Joe:
dual 4'' stacks

Do you have pictures? Who are you getting them from?



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2001. 5 QC 2500 White Sport 4x4 LWB ETC 5-Speed Anti-Spin 3. 54 Trailer Tow 241HD SLT+ Tan Leather(Mad Cow Disease) LT265/75R16E

 

[Forrest Nearing]

chambered mufflers (like Flowmasters) SHOULD NOT be used in ANY turbo application... gas or diesel...



they will hurt performance vs. a straight through style muffler.



Forrest