1.Borla XS, 80db at idle, 90db at 2,000 rpm, 110db at WOT.
2.Hooker Maxflow, 80db at idle, 90db at 2,000 rpm, 120db at WOT.
3.Magnaflow, 82db at idle, 91 at 2,000 rpm, 114db at WOT.
4.Flowmaster, 82db at idle, 93 at 2,000 rpm, 115db at WOT.
5.Flowtech Warlock, 83db at idle, 92 at 2,000 rpm, 112db at WOT.
6.Dynomax UltraFlo, 83db at idle, 94 at 2,000 rpm, 113db at WOT.
7.Borla XR1, 83db at idle, 96db at 2,000 rpm, 118db at WOT.
8.Bassani Street, 83db at idle, 96db at 2,000 rpm, 120db at WOT.
9.Edelbrock RPM, 84db at idle, 93db at 2,000 rpm, 118db at WOT.
10.Bassani Real Street, 84db at idle, 96db at 2,000 rpm, MAX. (120+db).
11.Flowtech Afterburner, 86db at idle, 94db at 2,000 rpm, 115db at WOT.
12.Flowtech Terminator, 86db at idle, 94db at 2,000 rpm, 119db at WOT.
13.Hooker Aerochamber, 87db at idle, 94db at 2,000 rpm, 114db at WOT.
14.SpinTech, 87db at idle, 97db at 2,000 rpm, 116db at WOT.
15.MAC, 87db at idle, 98db at 2,000 rpm, 119db at WOT.
16.No Muffler, 91db at idle, 103db at 2,000 rpm, MAX. (120+db).
The Hooker Maxflow made the best power while still being very quiet at idle/2000rpm, but nice and loud at WOT. The Bassani Real Street also made nice power without being too loud. Anybody have any feedback on these mufflers?
I have a 3" madrel bent cat back w/ a Hooker Max Flow Center In/Out muffler on it, previously I had a "dynomouth" cat back - I couldn't stand it. I'm hoping to get to the track soon and do some back to back testing. the "dynomouth and off road pipes lost power vs. the all stock exhaust, it pulled more trap speed, but was impossible to launch w/o massive tirespin or bogging. The new system seems better by the butt dyno, however that's just Internet banter & I prefer to post real results. What I can say for sure, I like my car much better. I no longer get headaches from the drone going to and from work. I get all kinds of compliments about how much better it sounds now. Not to mention I can actually hear my girlfriend talking to me when we ride togehter in the car. (Haven't decided if that's a good thing or not - the jury is still out on that one)
__________________ 1972 SS 454 Chevelle - 98% complete, Power Tour 2010? 1991 Z28 - Bolt ons/FTI converter. Parked, needs TLC. 00' Z28 A4 - 1.504 60' 10.777 @ 124.94 MPH (uncorrected) - For Sale.
suprising with no muffler or mufflers since it was i guess on a mustang it made the least amount of power...youd think just the opposite hmm.
My only guess would be that they were testing these mufflers on an engine that was on an engine dyno. They might have had and H or X pipe coming off the headers and then they had the mufflers put on right after the H or X. They might have also just put the mufflers directly on the headers? Either way with pretty much open headers I could see those kind of results.
If they were running an x-pipe and they took off the mufflers then they would definily pict up alot of hp and tq. I have done back to back testing on my car and I dynoed open headers and then open x-pip and the open X averaged 30 lbs tq more over the entire powerband. I then put on my spintechs and i lost about 8 lbs tq. and 9hp.
__________________ '97 Camaro SS Black M6
Donovan Aluminum 410ci LT1
1 of 2 aluminum LT1's in existance
'
02 2500HD, 4dr, short bed 4x4
AFE, 4" turbo back, Bully Dog computer, Big Head wastegate, FASS lift pump, ATS tranny and 5Star converter
So I'd assume they probably did the muffler comparisons right off the headers.
The test was done in 5.0 Mustang Magazine December 2002 issue (page 55) if anyone happens to have a copy and can clear this question up.
So I'd assume they probably did the muffler comparisons right off the headers.
The test was done in 5.0 Mustang Magazine December 2002 issue (page 55) if anyone happens to have a copy and can clear this question up.
It was a chassis dyno. . . those are RWHP numbers from a Notchback w/ heads/cam and bolt-ons.
I think they lost hp w/ no mufflers becuz they didn't mess w/ the fueling to accomodate the new flow.
On another note, the Borla XS is my favorite. . . it was their favorite in the article too, and that's what I'd go w/ on a custom cat-back.
Mike
'98 Z
M6, hotcam, stock heads
12.1@117 3480lbs raceweight, 1750 DA
1.Borla XS, 80db at idle, 90db at 2,000 rpm, 110db at WOT.
2.Hooker Maxflow, 80db at idle, 90db at 2,000 rpm, 120db at WOT.
3.Magnaflow, 82db at idle, 91 at 2,000 rpm, 114db at WOT.
4.Flowmaster, 82db at idle, 93 at 2,000 rpm, 115db at WOT.
5.Flowtech Warlock, 83db at idle, 92 at 2,000 rpm, 112db at WOT.
6.Dynomax UltraFlo, 83db at idle, 94 at 2,000 rpm, 113db at WOT.
7.Borla XR1, 83db at idle, 96db at 2,000 rpm, 118db at WOT.
8.Bassani Street, 83db at idle, 96db at 2,000 rpm, 120db at WOT.
9.Edelbrock RPM, 84db at idle, 93db at 2,000 rpm, 118db at WOT.
10.Bassani Real Street, 84db at idle, 96db at 2,000 rpm, MAX. (120+db).
11.Flowtech Afterburner, 86db at idle, 94db at 2,000 rpm, 115db at WOT.
12.Flowtech Terminator, 86db at idle, 94db at 2,000 rpm, 119db at WOT.
13.Hooker Aerochamber, 87db at idle, 94db at 2,000 rpm, 114db at WOT.
14.SpinTech, 87db at idle, 97db at 2,000 rpm, 116db at WOT.
15.MAC, 87db at idle, 98db at 2,000 rpm, 119db at WOT.
16.No Muffler, 91db at idle, 103db at 2,000 rpm, MAX. (120+db).
The Hooker Maxflow made the best power while still being very quiet at idle/2000rpm, but nice and loud at WOT. The Bassani Real Street also made nice power without being too loud. Anybody have any feedback on these mufflers?
is the mustang a single muffler cat-back system or dual???
if it is single I wonder if the Borla XS single in/dual out would work good for the f-body and set it up to look like the Magnaflow???
or the magnaflow on the list- how does it compare to the magnaflow for the f-bodies?
I know this is an old thread but i'm looking to get some mufflers. What I was wondering was according to those figures, mainly the straight through designs are quieter than the chambered mufflers besides an open pipe. How is that? I figured that with the straight through design and more flow, the sound would be louder. Why is this not true?
True Dual Muffler flow and dB comparison, Hooker Maxflow & Bassani Real Street? 
