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Re: Which Flowmaster is the best application [Re: gregok] #2586604
12/03/18 02:29 PM
12/03/18 02:29 PM
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jersey
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Spaceman Spiff Offline
master
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master
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jersey
Do you want noise, or mufflers that actually flow?


526 cubes of angry wedge, pushbutton shifted, 9 passenger killer!
Re: Which Flowmaster is the best application [Re: gregok] #2586653
12/03/18 03:51 PM
12/03/18 03:51 PM
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ontario canada kingston
aspenrt360 Offline
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Dynomax super turbos on all my cars never had an issue runs good too.


2013 Chrysler 300 touring 1974 Dodge Charger SE. 360-727-8.75-3.23 sure grip 1972 Dodge Dart Swinger 1995 Dodge Ram 1500 4x4
Re: Which Flowmaster is the best application [Re: aspenrt360] #2586787
12/03/18 09:56 PM
12/03/18 09:56 PM
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Montreal Quebec
STROKIE Offline
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Originally Posted By aspenrt360
Dynomax super turbos on all my cars never had an issue runs good too.


iagree http://www.pontiacstreetperformance.com/psp/exhaust.html

Re: Which Flowmaster is the best application [Re: gregok] #2586807
12/03/18 10:46 PM
12/03/18 10:46 PM
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MO, USA
Tom Hand Offline
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Wow, I recognize that article!
Tom Hand

Re: Which Flowmaster is the best application [Re: STROKIE] #2586860
12/04/18 01:15 AM
12/04/18 01:15 AM
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N.E. OHIO, USA
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Originally Posted By STROKIE
Originally Posted By aspenrt360
Dynomax super turbos on all my cars never had an issue runs good too.


iagree http://www.pontiacstreetperformance.com/psp/exhaust.html


A few surprises with that article thanks for posting. One surprise was the performance and sound level of the Supertrapp mufflers! Pretty much knew the Dynomax mufflers were much better all around over the Flowmasters hands down in almost all of the categories. There was a Moparts member a few years ago that changed his Flowmasters at the track (on the same day IIRC) to Dynomax and picked up several tenths in the quarter. I think there were no other changes during his testing other than the mufflers. Probably could have picked up a little more with jetting but the bottom line was the Dynomaxs' out performed the Flow's in his swap. Don't get me wrong the Flow's have that cool tin canny likable muscle car sound at idle and a pretty nice aggressive sound at wide open throttle BUT the drone at anything above or below those two points is unbearable, so bad that I have to push the clutch in or stick it into neutral and coast for a while to recover from the pain. Wonder what the Supertrapp's sound like...have a couple of bikes still with the Supertrapp mufflers and they sound good Hmmmmmmmmm probably have enough STRPP parts around to make a pair wink

Re: Which Flowmaster is the best application [Re: gregok] #2586972
12/04/18 12:08 PM
12/04/18 12:08 PM
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Oklahoma
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gregok Offline OP
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Oklahoma
Okay, you guys have changed my mind, i ordered a pair of Dynomax Super Flo’s. Thanks for all the constructive comments and experiences.

Re: Which Flowmaster is the best application [Re: gregok] #2586982
12/04/18 12:26 PM
12/04/18 12:26 PM
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Iowa
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Here is the inside of a Super Turbo. I think I found this picture on here and saved it. I don't like the way the exhaust flows right into the exit pipe. For low hp applications it probably doesn't restrict the flow much but I wouldn't want to use them on anything that is making good power. I'm not really a fan of the sound of these either. Exhaust sound is a very subjective thing.

6926580-SuperTurbo1 (1).JPG
Re: Which Flowmaster is the best application [Re: burdar] #2587001
12/04/18 01:14 PM
12/04/18 01:14 PM
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Originally Posted By burdar
Here is the inside of a Super Turbo. I think I found this picture on here and saved it. I don't like the way the exhaust flows right into the exit pipe. For low hp applications it probably doesn't restrict the flow much but I wouldn't want to use them on anything that is making good power. I'm not really a fan of the sound of these either. Exhaust sound is a very subjective thing.


go read the article linked above.


They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.
Re: Which Flowmaster is the best application [Re: gregok] #2587005
12/04/18 01:28 PM
12/04/18 01:28 PM
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Iowa
burdar Offline
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Unless I'm missing something, both Dynomax mufflers listed in the article are offset inlet and outlet. Those are designed differently inside. The center outlet design is the one that looks restrictive.

Re: Which Flowmaster is the best application [Re: burdar] #2587100
12/04/18 05:27 PM
12/04/18 05:27 PM
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Highland, MI.
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Originally Posted By burdar
Unless I'm missing something, both Dynomax mufflers listed in the article are offset inlet and outlet. Those are designed differently inside. The center outlet design is the one that looks restrictive.


Not really - they simply cross-flow internally. The sCFM #'s for offset/center, & offset/offset are about the same - around 410 sCFM's for both 2.25" & 2.5" Super Turbo versions. Still, Super Turbos do not do much "tuning" of the sound, but they do more than Ultra Flows. Ultra Flows are like oval glasspacks & other straight-through mufflers. Flowmasters TUNE the sound, but they do not flow impressive sCFM's because the plates internally cause quite significant restrictions.

Last edited by Sunroofcuda; 12/04/18 05:28 PM.

No Man With A Good Car Needs To Be Justified
Re: Which Flowmaster is the best application [Re: gregok] #2587108
12/04/18 05:54 PM
12/04/18 05:54 PM
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Iowa
burdar Offline
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Iowa
Here is a link that should show how the exhaust is routed in an offset inlet/outlet Dynomax. With this design the exhaust doesn't have to flow around the outlet pipe like the center outlet design. It may flow just fine but it "looks" like a restriction.

http://www.dynomax.com/mufflers/super-turbo-mufflers

Re: Which Flowmaster is the best application [Re: burdar] #2587240
12/04/18 11:03 PM
12/04/18 11:03 PM
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Bend,OR USA
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I wouldn't run that type of muffler on any of my cars due to the exhaust having to make two 180 degree turns in a short length to get out of the mufflers down twocents


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Which Flowmaster is the best application [Re: gregok] #2587254
12/04/18 11:30 PM
12/04/18 11:30 PM
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IL
furious70 Offline
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I ran FM 10 series on my fury for a number of years, what's all this complaining about their big mufflers 😎
I do have summit turbos and tailpipes now, plus the turbos themselves, much different now.


70 Sport Fury
68 Charger
69 Coronet
72 RR
Re: Which Flowmaster is the best application [Re: gregok] #2587354
12/05/18 04:01 AM
12/05/18 04:01 AM
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Granite Bay CA
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Awhile back when the report came out about flow rates of the popular mufflers, I read responses from the Flowmaster reps...."Ah, forget those tests....engines flow differently than the testing methods did."
I have the Welded Ultra Flo mufflers on my Charger. I had Flowmasters before. I did like the WOT sound of the Flowmasters but grew tired of the sound at all other times.

Re: Which Flowmaster is the best application [Re: gregok] #2587431
12/05/18 12:13 PM
12/05/18 12:13 PM
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Marion, South Carolina [><]
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Dynomax Super Turbos are restrictive as he11 and definitely hurt power!
I like Flowmasters personally, but know a lot don't.
Never seen the performance drop from Flowmasters a lot claim though. Had a set of 3" 40 series Flowmasters on my cuda w/ a 440 that ran 11.40s in the 1/4 and it ran the same w/ the mufflers or without them.

The Dynomax Ultra Flow, Hooker Max Flow, or Hooker Aerochamber are very good flowing and sounding mufflers too.


CHIP
'70 hemicuda...8 sec street car
'69 road runner 440 w/ Indy SRs
'69 road runner 440-6, 4 speed...Dad's ride
'71 Demon 340 resto project
'73 Chrysler New Yorker
'06 GMC 2500HD LBZ Duramax...toy hauler
Re: Which Flowmaster is the best application [Re: gregok] #2587434
12/05/18 12:17 PM
12/05/18 12:17 PM
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Posts: 3,133
St. Charles, MO
wingman Offline
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St. Charles, MO
I had Flowmasters on my 70 B-body, and the drone at highway cruising RPMs was AWFUL.

Switched from manifolds to headers, then switched from an H-pipe to and X-pipe while keeping mufflers the same. Got a little better, but still droned badly.

Your mileage may vary, but I would not use them again.

Re: Which Flowmaster is the best application [Re: gregok] #2587535
12/05/18 03:16 PM
12/05/18 03:16 PM
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Stoney Creek, Ontario, Canada
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Some time ago, Michigan state university did a muffler comparison and put out this chart.

Re: Which Flowmaster is the best application [Re: gregok] #2587537
12/05/18 03:17 PM
12/05/18 03:17 PM
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Posts: 338
Stoney Creek, Ontario, Canada
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Crap - it didn't attach the chart......

6604983-MufflerComparisionChart.jpg
Re: Which Flowmaster is the best application [Re: gregok] #2587549
12/05/18 03:39 PM
12/05/18 03:39 PM
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Posts: 16,409
Canada
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I think I've ran em all lol
I tossed Dynomax Super Turbos on my daiy driver Cordoba, 2 1/2" mandrel bends out the rear coming off Hooker SuperComps. Love the sound honestly. No drone, nice sound and fairly quiet at cruising speeds.
Best Flowmaster sound I have heard was my motorhome, I loved it. Healthy hydraulic roller 360, headers, Y-pipe into SINGLE 3" exhaust and two 3" Flowmaster 50 series in TANDEM.
I loved it. Quiet and gorgeous tone, no drone.


CrAzYMoPaRGuY
Re: Which Flowmaster is the best application [Re: gregok] #2587601
12/05/18 04:41 PM
12/05/18 04:41 PM
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Posts: 17,088
S.E. Michigan
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It took a couple tries but I felt I got it perfect on one car, I loved the sound of the 2.5" 20" super turbos on my 5.7 magnum r/t daily driver (manifolds, jba catless mids). I also tried 2 chamber flowmasters and hooker aero chamber on it. flowmasters were too loud for long drives for my taste, hooker was slightly quieter but still just a little too much sound. The 20" dynomax required some light fab work to fit, but I liked them the best. The problem with alot of late models is most exhaust for them is spec'd with cats which kill alot of volume. Go catless and suddenly everything is louder and more droney.

I loved the sound of hooker aero chamber 3" on my GTX when I had H pipe, 1 and 7/8 comp headers, and almost the same engine combination as now. However I was chasing power so I went slightly bigger and with ultra flo. I also like those quite a bit. the power thing worked out ok in conjunction with other changes.

For short blasts in a hot rod I'm ok with the classic flowmaster thing, but they better be pretty short drives. To jump in and drive for a couple hours, I'd have to go with old-man 20" super turbos. I believe these are what used to be marketed as hemi super turbos....











Rich H.





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