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
Негізгі бет muffler dyno testing comparison Flowmaster vs Dynomax Ultra Flo 3" on a 700 HP 496 bbc stroker
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