I want a muffler but - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

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Old 04-06-2004, 10:40 PM   #11
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Quote:
All tests via an independent lab
All tests @ 15 wc

2 Straight Pipe 283 CFM
2 Straight Pipe 365 CFM
2 Straight Pipe 521 CFM

2 Typical Bent tailpipe 268 CFM
2 Typical Bent Tailpipe 417 CFM

2 Inlet/Outlet_ Glass Pack Tips- No Louvers- Smooth 274 CFM
2 Inlet/Outlet- Glass Pack Tips-Louvered 133 CFM
Same as above set for reverse flow 141 CFM
2 Cherry Bomb 239 CFM
2 Cherry Bomb 294 CFM

2 Inlet/Outlet Dynomax Super Turbo 278 CFM
2 Inlet/Outlet Ultraflow Bullet 512 CFM
2 Inlet/Outlet Gibson Superflow 267 CFM
2 Inlet/Outlet Flowmaster ( 2 Chamber) 249 CFM
2 Inlet Outlet Flowmaster ( 3 Chamber) 229 CFM
2 Inlet/Outlet Thrush CVX 260 CFM
2 Inlet/Outlet Maremount Cherry Bomb 298 CFM
2 Inlet/Outlet Hooker Aero Chamber 324 CFM
2 Inlet/Outlet Hooker Max Flow 521 CFM
2 Inlet/Outlet Borla Turbo 373 CFM
2 1/2" Inlet/Outlet Magnaflow 284 CFM
Quote:
On the bright side it doesn't seem to make much of a difference. 66 dyno pulls were done on a fixed up ford 5.0 and these were the results:

1.Flowtech Warlock (open) 374.2 hp/ 333.1 tq
2.Bassani Real Street 373.7 hp/ 333.8 tq
3.Hooker Maxflow 373.5 hp/ 333 tq
4.Borla XS 373.3 hp/ 332.6 tq
5.Magnaflow 372.8 / 332.5 tq
6.MAC 372.3 hp / 331.5 tq
7.Flowtech Afterburner 372.3 hp/ 330.1 tq
8.Hooker Aerochamber 372.1 hp/ 330.4 tq
9.Bassani 372 hp/ 333.5 tq
10.Spintech 371.6 hp/ 332.2 tq
11.Edelbrock Performer RPM 370.9 hp / 331.3 tq
12.Borla XR1 370 hp/ 334 tq
13.Flowtech Terminator 369.5 hp / 331.3 tq
14.Dynomax Ultra Flo 369.4 / 333.2 tq
15.Flowmaster 369.4 hp / 331.8 tq
16.Flowtech Warlock 366.3 hp / 325.3 tq
17.No muffs 365.2 hp / 330.1 tq
Quote:
I'm going for the most replies to a single thread haha. Okay so you want sound? Here ya go:

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).

Heeey flowmaster doesn't win again!
So comparing just the more popular (here in Bonneville Land) 2 mufflers, Flowmaster and Magnaflow, The Magnaflow is 1% more hp (3.5 hp over Flowmaster), 0.2% better in torque (basically the same), 14% better in flow, and virtually the same sound, except for a 1db quieter level at WOT.

It doesn't sound like much, but it is an edge. There are alot of people that won't laugh at a 3.5 hp difference.
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Old 04-06-2004, 11:19 PM   #12
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will is your resonator removed?
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Old 04-07-2004, 01:08 AM   #13
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Originally Posted by GAMEOVER
will is your resonator removed?
his car didn't come with one
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Old 04-07-2004, 04:17 AM   #14
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Listen to wills magnaflow. It has a mellow idle and growls good in mid throttle rips.

Popping happens no matter what muffler you have on our setup if there is no resonator. F-Body'* get the same problem. The pipe before the muffler is to long. The fix it the same way with a small resonator or they go true duals.
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Old 04-07-2004, 04:25 AM   #15
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Spank you very much, Bass.

If you want a performance exhaust, and your choices are the 3 most popular here, you're going to have to pick Magnaflow over Flowmaster and Dynomax. The resonator will not adversely affect your performance if you want to further 'tune' the sound.
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Old 04-07-2004, 08:39 AM   #16
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Quote:
Originally Posted by Bassplayincrowe
Listen to wills magnaflow. It has a mellow idle and growls good in mid throttle rips.

Popping happens no matter what muffler you have on our setup if there is no resonator. F-Body'* get the same problem. The pipe before the muffler is to long. The fix it the same way with a small resonator or they go true duals.
i disagree listen to zzzeke'* bonnie his doesnt pop at all like others do
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Old 04-07-2004, 09:09 AM   #17
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Quote:
Originally Posted by GAMEOVER
Quote:
Originally Posted by Bassplayincrowe
Listen to wills magnaflow. It has a mellow idle and growls good in mid throttle rips.

Popping happens no matter what muffler you have on our setup if there is no resonator. F-Body'* get the same problem. The pipe before the muffler is to long. The fix it the same way with a small resonator or they go true duals.
i disagree listen to zzzeke'* bonnie his doesnt pop at all like others do
GameOver i also have to disagree. I have a flowmaster 80 series and running everything just like zzzzzzeke and my muffler sounds just like his.i don't think that you will get popin with every aftermarket muffler. With the flowmaster i gained a lot of interior noise but all in all a nice tuned sound from the back. if your looking for a nice lowend rumble then the flowmaster is what your looking for.
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Old 04-07-2004, 09:32 AM   #18
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jl - are you disagreeing with GAMEOVER or BASS??
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Old 04-07-2004, 09:46 AM   #19
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zzzzeke'* wasnt being reved to **** either, but the same setup +SC -RES with crazydriver does a little (i think)

Then again he doesn't have to
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Old 04-07-2004, 11:41 AM   #20
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Quote:
i disagree listen to zzzeke'* bonnie his doesnt pop at all like others do
Quote:
GameOver i also have to disagree. I have a flowmaster 80 series and running everything just like zzzzzzeke and my muffler sounds just like his.i don't think that you will get popin with every aftermarket muffler. With the flowmaster i gained a lot of interior noise but all in all a nice tuned sound from the back. if your looking for a nice lowend rumble then the flowmaster is what your looking for.
Zzzeke'* video has other cars idling in the recording so theres no clean representation for me to hear off it. Give it WOT and then get off it. Thats when rasp comes up, hell even my stock muffler will rasp a little when I do that. (My buddies Camaro does too). There'* always some sort of rasp with our setup. The beginning pipe is too long.

The flowmaster definately grumbles which i think would lend itself to popping easily. I like the more sophisticated straight through sounds of the magnaflow/dynomax. Personal preference I guess.
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