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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 04-04-2004, 09:35 PM   #11
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Ok, for what it'* worth, here'* my exhaust experience. I went to Car-X, told them what I wanted (80 series crossflow) after looking through thier catalouge. They "made it fit" , put custum tails on it, and welded everything together. The sound at idle is tremendus, very v8 sounding. No real drone or in car noise. Sounds like a mustang, camaro, and the like. Personally I'm considering doing away w/ my resonator, for a louder sound, but afraid it will mess up my V8 rumble, so not sure at this point.

It cost me $129.00 for the 80 series, plus parts and labor, including the tails etc, $302 and change. Kinda hi, but to me well worth it, plus I got a warrenty.
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Old 04-04-2004, 10:31 PM   #12
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Keep the resonator. I'm considering ADDING one.
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Old 04-04-2004, 11:24 PM   #13
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Quote:
Originally Posted by willwren
Keep the resonator. I'm considering ADDING one.
I was actually thinking about getting rid of mine though. Is it just too "obnoxiously" loud or just too loud in general? Should I get a hi-flow CAT first and see how it sounds then? Plus youalso have the SC so yours is louder than mine anyway...
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Old 04-05-2004, 12:36 AM   #14
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Quote:
Originally Posted by bonnie94sse
Quote:
Originally Posted by willwren
Keep the resonator. I'm considering ADDING one.
I was actually thinking about getting rid of mine though. Is it just too "obnoxiously" loud or just too loud in general? Should I get a hi-flow CAT first and see how it sounds then? Plus youalso have the SC so yours is louder than mine anyway...
Yours should sound slightly lower then will'*, pete. Slightly quieter too. The res keeps it smooth too, it'll be much rougher sounding without. Kinda why SSEi95'* sounds like a diesel almost.
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Old 04-05-2004, 01:31 AM   #15
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will, are you gonna run them parallel or series? With your engine output I would think parallel would be best, or a hi flow cherrybomb type deal.
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Old 04-05-2004, 03:22 AM   #16
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Single cherry bomb/glasspack between the cat and muffler.
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Old 04-05-2004, 09:23 AM   #17
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Quote:
Originally Posted by willwren
Keep the resonator. I'm considering ADDING one.

its gotta be completely different with 2.5" tubing and boost inside......i'd say i have lots of room to ditch the resonator too before it gets obnoxious......


BTW.....$129 was way too much for that flowmaster muffler.....can get it for under $80 shipped from jegs or summit.
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Old 04-05-2004, 09:33 PM   #18
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Quote:
Single cherry bomb/glasspack between the cat and muffler.
Make sure you size it right. The volume is important to match with your engine size for effectiveness.
My stock resonator is about 6" oval and 21" long.
It does a fine job of muffling any resonations.
I only wish the inlet and outlet pipes were larger than 2 1/2 in --- 2 1/4 out.
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Old 04-05-2004, 11:05 PM   #19
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Just to reiderate something, seperate dual pipes aren't the best, except on extreme high HP V8 engines. On 98% of street cars, a large single pipe, or x is prefered. Dual exhaust on fwd is just downright silly

Now the dual look is fine, and with crossflow mufflers, that'* no problem.
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Old 04-06-2004, 10:51 PM   #20
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More exhaust info from elsewhere on the forum and internet:

Quote:
Originally Posted by willwren
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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