muffler dyno testing comparison Flowmaster vs Dynomax Ultra Flo 3" on a 700 HP 496 bbc stroker
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- Опубликовано: 13 сен 2024
- i wanted to test my Flowmasters 943043 against my new Dynomax 17221. I learned on Dragweek 2018 that my car was almost 4 tenths faster with open exhaust. I preferred not to remove the exhaust but that was too much of a change to my ET to ignore.
Fessler Race Enigines gave me a chance to see what the power difference is. Here are the results of my testing. Unfortunately I was not able to get a decibel comparison.
The first muffler set used were the flowmasters as run on the car including turndowns.
The second set used were the Dynomax Ultra flows.
Special thanks to Craig at Craig's Customs for whittling out some pipes so I could test the dynomax mufflers.
Flowmaster
5000 RPM 528 lb ft 503 hp
5500 RPM 538 lb ft 563 hp
6000 RPM 538 lb ft 614 hp
6500 RPM 499 lb ft 618 hp
Dynomax ultraFlo
5000 RPM 587 lb ft 559 hp
5500 RPM 596 lb ft 624 hp
6000 RPM 582 lb ft 665 hp
6500 RPM 540 lb ft 668 hp
Dynomax Averaged 54 more hp from 55-6500 RPM
I switched from FM to DM years ago. I’ll never waste money again 😂
Wow... That is a huge difference !!!!
ChokeMasters is what I call them!!! I love the sound... But that is WAY too much power to give up.... I'm running BlackWidow mufflers now... They have the Flowmaster sound but without the drone and powerloss
The worst flowing Flowmaster has to be 80 series crossover. I literally felt like I lost 10hp on a stock 2000 Trans Am Ws6. I owned that system for 13 months, after that the muffler developed a hole about the size of a quarter. Replaced it with a stainless steel Magnaflow and had awesome results.
Finally a real test. Thank you!
Been trying to tell people for years that Flowmasters are more restrictive. JMO, but I believe Ultra Flows are the best bang for your buck available right now. They're on my big block and soon to be on my daily driver.
ULTRA FLOWS MAKE MY FE SOUND SICK
I really do love the sound of my 3.5" flow masters but I believe the Hooker aero chambers I had on it before made more power. Chambered mufflers kill power. If you can't see through it it's killing your power! Nice comparison man. Thanks subbed
Correct areo chambered are like crapmasters but better
I'm sure you lost Power with the Flowmasters, i meant Crap masters, quite possibly the worst performance muffler out there, super restrictive, exhaust flows into a Wall, many better performance Mufflers out there, Dynomax Ultra Flos are nice.
If you look at construction an offset inlet + outlet on a chambered muffler is going to be far more restrictive for a 700hp engine. Centre in + out would have closed the gap somewhat I reckon but Ultra flows would be less restrictive at high rpm so they going to win on a comparison like this
So true! I almost put my face through the windsheild of my '86 5.0 mustang leaving the muffler shop after swapping the stock mufflers for Flowmaster 2 chambers
Thanks for taking the time and $$ to post this. My HP #s are close to yours so a big help in making a choice.
I originally bought the offset flowmasters when I ran a mandrel tailpipe that exited in OE location behind the tires. Not sure how much tweaking it would require now.
I'd say once you creep over 525 it probably starts hindering performance.
Thank you for posting this up.this finally puts away all the myths about Flowmaster being the better flowing muffler out there.i been trying to tell them that they dont flow as superior to other brands out there
Thanks for posting this, real numbers are hard to beat vs it should or it might or it could make more power.
I must have missed the comparison and the BBC stroker
Good to know the power numbers, now, what about sound levels? I am looking for a quieter, not so droning Muffler since I drive my cars. Which one was quieter at idle and under WOT?
At idle the dynomax are quieter. At WOT I'm not sure but it should be loud.
Thats a big difference in power.I think 2nd one sounded better and deeper
Awesome testing!!! 👍🏻👍🏻
Now I just need to find something that sounds like a chambered flowmaster but flows like a dynamax
Note to the unaware, This was a test between a straight thru race muffler vs a baffled street muffler. Just sayin.
And yet the "race muffler" is quieter in typical driving rpm. Flowmaster claims "The 'Delta' deflectors generate increased scavenging for better performance and reduced interior sound". They are a good noisy muffler and don't kill to much performance at a 500 hp level. After that people should think about about a better option.
@@bure4me Funny what some people consider ‘race’ vs ‘street’.
Now that they have been on you car awhile do you still like them ? I have had a set of 3 chamber Flowmasters on my street/strip car for over 20 year they were great back in the day but I feel better mufflers have come out since then.
I have no complaints
@@bure4me I'm thinking about upgrading my 3 chamber Flow master to the Dynomaxs
That’s a huge difference. And the only change was mufflers?!
I had a welded turndown on the flowmasters but no timing changes or other adjustments.
ive heard that flowmasters don't like tight lobe center cams, was this one tight or are the mufflers just that bad
Both. This cam is a 108 but the cam I was using prior was a 112. The 112 lsa cam made 680 hp but the car never ran like a 680 hp would. The track doesn't lie so I know it was killing power.
Turn downs on the ones so not fair comparison on sound.
I'm really curious how the drone is on the Ultra Flo mufflers. Looking to get a crossflow/transverse version. Do you know?
Drone? I have a number videos from in the car driving through the mountains and plains. The wind makes more noise.
The ultra flow mufflers are packed with a fiberglass layer and mesh layer, drone is essentially non existent with that type of packing. Dynomax also does a turbo style muffler with fiberglass matting which is excellent for a daily application, my brother installed a single one in the mid pipe on his b5 Audi A4 2.8L v6 with no muffler in the back, sounded excellent and had absolutely no drone or rasp, sounded near stock in the cab compared to the super 44 he had on it first which was obnoxiously loud. Nice clean v6 burble with some pops and bangs on decel.
What make and model oil pan are you using? Thanks!
Summit G3606
I couldn't tell from the tiny dyno sheets, what was the difference?
Flowmasters
5000 rpm 528 lb ft 503 hp
5500rpm 538 lb ft 563 hp
6000rpm 538 lb ft 614 hp
6500rpm 499 lb ft 618 hp
Dynomax
5000rpm 587 lb ft 559 hp
5500rpm 596 lb ft 624 hp
6000rpm 582 lb ft 665 hp
6500rpm 540 lb ft 668 hp
@@bure4me
Thank you for the reply
That's a shit ton of power difference.
How much of a difference on the car sound wise?
@@aslawnscapes1253 sound shouldn't be an issue if you're leaving 50tq/hp on the table. They sound awesome. have heard them on 250-ish SBF 302 (2.5") and a big block mopar (3")
I had same exact flowmasters, then installed same exact Dynomax on my milder 496, a ton of difference, and sounds better. Mine are dumped at the axel. Thanks for the video.
Dynomax produces a smoother, cleaner tone, where the baffled mufflers offer that poppy brash sound. Love how flowmasters sound on a v8 myself but the dynomax still sounds really good, has less drone, and offers better power gains.
Which are louder?
Flowmaster were louder at idle and cruise rpm. They are both pretty loud at wide open throttle.
@@bure4me Thanks.