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PostPosted: Tue Jan 03, 2012 1:56 pm 
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Location: SE Michigan
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Soooo, now that I'm almost done with my second l67 project, I'm looking at parts for the exhaust for my LeSabre.
FYI the exhaust had been replaced before I got the LeSabre, and the place that did it put in 2.25" with 2" ripple bends instead keeping the stock piping.

I have headers, 3" piping, mandrel bends. Will be getting the 3" spun metal cat next. But for the resonator and muffler I can't decide. I want something that screams (or makes people scream) at WOT. I don't want drone at freeway speeds, I don't want rasp.
I've heard the best tone is with the Hooker aero chamber.
Would a glasspack be a better choice than a resonator?
Current plan is to split at the rear suspension to dual 2.5" mufflers.
Any thoughts?

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PostPosted: Tue Jan 03, 2012 2:07 pm 
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I have a glasspack as my resonator, and I love it! I also have Flowmaster Super 44 Delta flows out back, the third chamber helps reduce drone and I hardly ever notice any, and it is definitely not obnoxious IMO. There are some that will hate on Flowmaster, my opinion is that I prefer them to Magnaflow Mufflers. :btruestory: Hope you find the sound you're going for.

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88 Cutlass Ciera Brougham International | 120k mi | White w/ Dk Claret Int. | Roller to be S2 L67/4T65E-HD | 1 of ~5100 3.8 FE3 Int'l series
91 Riviera | S2 L67 Swap/4T60E | 127K mi | Antelope Met. w/ Tan Int. | Saved From Death By Crusher
92 Bonneville SSE | L67/4T60E | 77K mi | Med Slate Grey w/ Two-Tone Grey Int. | Low Miles Time Capsule
92 Lumina Z34 | LQ1/4T60E | 177k mi | Torch Red w/Grey Int. | Rusty In Odd Spots
99 Tahoe LT | L31/4L65E | 276k mi | Spiral Grey Metallic w/Grey Int. | Truck for Truck Things and Portable Concert Hall
03 Park Avenue Ultra | 212K mi | White Diamond Met. w/ Shale Int. | Southern Time Capsule
05 Acura RL | 155K mi | Carbon Grey Pearl w/Ebony Int. | The Super-Hooptie Daily


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PostPosted: Tue Jan 03, 2012 2:25 pm 
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Glasspacks change their sound over time. I prefer traditional resonators for this reason.

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PostPosted: Wed Jan 04, 2012 4:50 pm 
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magnaflow 4" or 5" round are good resonators as are vibrant. Glass packs do tend to break down over time and get louder and are not generally made of Stainless like the 2 i mentioned above. the resoantor will clean up the sound and slightly quiet it, the mufflers are going to make the biggest change in the sound of the exhaust. resonators also have a perferated core and most glass packs have louvered core so your 3" exhaust will actually be smaller because of the louvers in the glass pack.

S

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Last edited by redzmonte on Wed Jan 04, 2012 4:51 pm, edited 1 time in total.

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PostPosted: Wed Jan 04, 2012 6:30 pm 
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That's exactly what I have. A Magnaflow 4" with a 2.5 inlet and outlet. For a 3" setup, the 5" may be the only choice. It takes out about 50% of the drone, and all the rasping and popping. The WOT sound remains unchanged.

I still retain some cruising drone, but I can kill it by opening my cutout 5% when on the freeway (and gain a little fuel efficiency).

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PostPosted: Wed Jan 04, 2012 7:12 pm 
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The problem with a well-intaked 3800 S/C is that you cannot hear the exhaust in the car above 20% throttle or so unless it's stupid loud, so I don't really see the point of making it stupid loud. The blower whine is in and of itself intoxicating, and my exhaust (3" DP and HF Cat, stock cat-back) sounds awesome at idle and low throttle. JMHO...

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PostPosted: Wed Jan 04, 2012 9:08 pm 
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I have a Moroso Muffler in place of my resonator. I am running the hooker mufflers with a Moroso Muffler in place of the resonator. My car doesn't have any drone or rasp and has gotten compliments from several people that were surprised it was a V6. Like Beast said, the car looses lot of its tone in the mid to upper throttle range, just a fact of the engine.

I don't think you will be disappointed at all with the hooker mufflers and glasspack/muffler in place of the resonator, whichever you choose. I tried ordering the glasspack since it was much cheaper than the Moroso Muffler, but due to back order problems, I got the muffler for the price of the glasspack!

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PostPosted: Thu Jan 05, 2012 10:23 am 
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Thanks, I'll have to start sourcing parts now.. Any thoughts on the flowmaster 10 series mufflers?

I had my fiance drive the car the other day to get used to the L67 pull :twisted: . I told her to try to pass me (in my truck), and I couldn't even hear the supercharger or the exhaust when she was going by. I definately have to fix that.

The 4WD pig is also a lot faster off the line :bluetwitch: , what with the monster 455 low end torque and all, so I'll have to do something about that too.

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The Fleet:
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'97 Camaro - Top swap
'05 STS - V8, AWD, her DD
'92 Trofeo - Fair weather DD
'99 Montana - top swap 3800
'04 Sierra 2500HD - LLY Duramax

Current project:
Something cool, trust me.

Upcoming projects:
'92 Bonneville SSE
'87 LeSabre T-type
'67 LeSabre

Gone to greener pastures:
'84 Sierra Classic - Twin turbo 3800
'97 LeSabre - Top swap

RIP:
'86 LeSabre - pictures
'93 SE - L67


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PostPosted: Thu Jan 05, 2012 11:06 am 
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Flowmaster 10 series will be stupidly loud. The 44 series is the loudest street legal muffler Flowmaster sells. 10 series are race mufflers IIRC.

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88 Cutlass Ciera Brougham International | 120k mi | White w/ Dk Claret Int. | Roller to be S2 L67/4T65E-HD | 1 of ~5100 3.8 FE3 Int'l series
91 Riviera | S2 L67 Swap/4T60E | 127K mi | Antelope Met. w/ Tan Int. | Saved From Death By Crusher
92 Bonneville SSE | L67/4T60E | 77K mi | Med Slate Grey w/ Two-Tone Grey Int. | Low Miles Time Capsule
92 Lumina Z34 | LQ1/4T60E | 177k mi | Torch Red w/Grey Int. | Rusty In Odd Spots
99 Tahoe LT | L31/4L65E | 276k mi | Spiral Grey Metallic w/Grey Int. | Truck for Truck Things and Portable Concert Hall
03 Park Avenue Ultra | 212K mi | White Diamond Met. w/ Shale Int. | Southern Time Capsule
05 Acura RL | 155K mi | Carbon Grey Pearl w/Ebony Int. | The Super-Hooptie Daily


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PostPosted: Thu Jan 05, 2012 12:53 pm 
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Here is the Moroso race muffler that I use for a resonator
http://www.moroso.com/catalog/categoryd ... code=35054
and not to bad on price
http://www.summitracing.com/parts/MOR-94050/

ROD

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PostPosted: Thu Jan 05, 2012 2:14 pm 
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This is what is in place of my resonator. FWIW.

http://www.holley.com/types/Red%20Hots.asp

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88 Cutlass Ciera Brougham International | 120k mi | White w/ Dk Claret Int. | Roller to be S2 L67/4T65E-HD | 1 of ~5100 3.8 FE3 Int'l series
91 Riviera | S2 L67 Swap/4T60E | 127K mi | Antelope Met. w/ Tan Int. | Saved From Death By Crusher
92 Bonneville SSE | L67/4T60E | 77K mi | Med Slate Grey w/ Two-Tone Grey Int. | Low Miles Time Capsule
92 Lumina Z34 | LQ1/4T60E | 177k mi | Torch Red w/Grey Int. | Rusty In Odd Spots
99 Tahoe LT | L31/4L65E | 276k mi | Spiral Grey Metallic w/Grey Int. | Truck for Truck Things and Portable Concert Hall
03 Park Avenue Ultra | 212K mi | White Diamond Met. w/ Shale Int. | Southern Time Capsule
05 Acura RL | 155K mi | Carbon Grey Pearl w/Ebony Int. | The Super-Hooptie Daily


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PostPosted: Thu Jan 05, 2012 3:19 pm 
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SSEiMan01 wrote:
Flowmaster 10 series will be stupidly loud. The 44 series is the loudest street legal muffler Flowmaster sells. 10 series are race mufflers IIRC.


I was thinking to use one in place of a resonator. Its probably still not a good idea.

When comparing nearly identical resonators (for example Vibrant 1794 vs vibres18-300), what is the difference the overal length of the body doing to the tone/drone/rasp? It seems like it would give it a deeper tone if it was longer, but I have space constraints as there isn't room for a resonator in the floor pan of the older H-body cars. Would two resonators in series do anything different? One short one by the cat and another short one near the mufflers?

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The Fleet:
'93 SSEi - Twincharged + manual Build thread
'97 Camaro - Top swap
'05 STS - V8, AWD, her DD
'92 Trofeo - Fair weather DD
'99 Montana - top swap 3800
'04 Sierra 2500HD - LLY Duramax

Current project:
Something cool, trust me.

Upcoming projects:
'92 Bonneville SSE
'87 LeSabre T-type
'67 LeSabre

Gone to greener pastures:
'84 Sierra Classic - Twin turbo 3800
'97 LeSabre - Top swap

RIP:
'86 LeSabre - pictures
'93 SE - L67


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PostPosted: Thu Jan 05, 2012 6:42 pm 
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the longer and the larger round the more effective it is at reducing/removing rasp/drone. i have a 5" round magnaflow under the center of my monte where the cat was.... Uhh Is.... :) and a 4" round by the passanger rear wheel before the Y and it quieted the system enough from throaty/raspy to pretty throaty and smooth. if you can fit 2 small/medium it will only make it cleaner. I would start with 1 res as large as you can fit and the mufflers and go from there. BTW im running 2.5" mandrel on my cars turbo and SC. i had 3" on my L67 Lumina for a bit but the TQ fell off quite abit vs the 2.5" so i went back to 2.5" mandrel and gained my tq back and it came into tq quicker. I did dyno it and it lost like 30 ft/lbs but gained like 8 peak HP.. you will have more options on compact resonators in 2.5".

S

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PostPosted: Thu Jan 05, 2012 7:18 pm 
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I agree that 3" is going to cause you to lose a good bit of torque, and isn't really necessary. A well designed 2.5" system will give you everything you want.

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PostPosted: Thu Jan 05, 2012 10:27 pm 
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Location: Oregon WCBF'04, '05, '06, '07, '08, '09, '10, '11 Survivor
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2.5" is WAY more than enough. I'm flowing a ton, and my cutout only buys me about a tenth of a second on the 1/4 mile. That should tell you something.

Go for the longest resonator you can fit. I cut the flanges shorter on mine to be able to use the longer one.

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PontiacDad at WCBF '04: Cruise control? That's like surrendering!
Comprehensive guide to troubleshooting, rebuilding, and modifying Eaton Superchargers


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PostPosted: Fri Jan 06, 2012 3:22 pm 
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Location: SE Michigan
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Well, I do have the complete system from Mr. Rusty ('93 SSEi donor) or the '93 SE system that I could use to fit the headers/cat/resonator/muffler(s), from what I can tell though the OEM systems are 2.25" aluminized steel and not mandrel bent. I also have a complete system from a '89 Electra PA, it's definately 2.25" aluminized with crinkle bends.

I definately don't want to lose power, but I was thinking ahead to my 300hp goal and likely beyond, now that I've got everything shoe-horned in and working properly. Is there a pre-made 2.5" mandrel bent section I can just get somewhere? I can always use my 3" stuff on the truck...

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The Fleet:
'93 SSEi - Twincharged + manual Build thread
'97 Camaro - Top swap
'05 STS - V8, AWD, her DD
'92 Trofeo - Fair weather DD
'99 Montana - top swap 3800
'04 Sierra 2500HD - LLY Duramax

Current project:
Something cool, trust me.

Upcoming projects:
'92 Bonneville SSE
'87 LeSabre T-type
'67 LeSabre

Gone to greener pastures:
'84 Sierra Classic - Twin turbo 3800
'97 LeSabre - Top swap

RIP:
'86 LeSabre - pictures
'93 SE - L67


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PostPosted: Fri Jan 06, 2012 3:23 pm 
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Or perhaps put a restriction that I can remove later for when I actually need 3" pipe

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The Fleet:
'93 SSEi - Twincharged + manual Build thread
'97 Camaro - Top swap
'05 STS - V8, AWD, her DD
'92 Trofeo - Fair weather DD
'99 Montana - top swap 3800
'04 Sierra 2500HD - LLY Duramax

Current project:
Something cool, trust me.

Upcoming projects:
'92 Bonneville SSE
'87 LeSabre T-type
'67 LeSabre

Gone to greener pastures:
'84 Sierra Classic - Twin turbo 3800
'97 LeSabre - Top swap

RIP:
'86 LeSabre - pictures
'93 SE - L67


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PostPosted: Fri Jan 06, 2012 4:41 pm 
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You can get mandrel bends from Flowmaster, Magnaflow and other exhaust places in whatever size you want.

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PostPosted: Fri Jan 06, 2012 10:11 pm 
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Location: Oregon WCBF'04, '05, '06, '07, '08, '09, '10, '11 Survivor
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95 SLE (SC)
97 Buick LeSabre
All Bonneville exhaust is stainless steel with mandrel bends. If you have otherwise, it's aftermarket.

All SE's got 2.25". All L67's got 2.5" to a POINT.....SSEi all the way back to the muffler, some Supercharged SE (SLE) got 2.5 through the cat, then drops to 2.25".

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PontiacDad at WCBF '04: Cruise control? That's like surrendering!
Comprehensive guide to troubleshooting, rebuilding, and modifying Eaton Superchargers


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PostPosted: Sat Jan 07, 2012 3:17 pm 
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Silicone intakes actually sells mandrel bends and Straight piping. as does ebay, and many sites. 2.5" is good till up over 300hp on our cars. untill you have the mods need with the 3" i was not happy with the 3" system. i dynoed 280hp on my 2.5" mandrel system. I got my stainless straight sections from Jegs IIRC.

http://www.siliconeintakes.com/index.php?cPath=10&osCsid=e730eb86dd8af58eceb01d5527bb7187

S

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2004 Z16 Z06: Virgin
2000 SSEi: Kenwood DDX512, 3.25" MPS, ZZP DP, PLog, Puck Mount, NGK TR7's, DHP Tuned
1995 Monte Z34: T04e "60" turbo, 42.5# injectors, Borla Catback, OBDII swap, DHP Tuned, Much more...


Last edited by redzmonte on Sat Jan 07, 2012 3:19 pm, edited 1 time in total.

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