So we dissected an L99 resonator today.... - Page 2 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

2010victoryredss_ron · 11-01-2010, 06:58 PM

finally, one cut open...think mine is going soon

Hicompression · 11-01-2010, 07:13 PM

Can you pleeeeeaaaaase now cut open an LS3 resonator so we can see what's inside???

*The_Blur* · 11-01-2010, 07:29 PM

This is very interesting.

These images definitely give us a good insight into what the L99 guys could do without. GM did a great job making these V8s powerful and sounding good. With a little work, these can sound more aggressive and really reduce the restriction.

*Milk 1027* · 11-01-2010, 07:35 PM

Quote:

Originally Posted by SGOS252382

The L99 also uses different mufflers. They look the same on the outside, but they are very different on the inside. There are some pictures floating around the forum of the inside of the L99 mufflers. The LS3 muffers are a straight through muffler. The L99 mufflers have this crazy piping on the inside to help reduce AFM noises.

J pipe

axis · 11-02-2010, 02:08 AM

Quote:

Originally Posted by SGOS252382

The L99 also uses different mufflers. They look the same on the outside, but they are very different on the inside. There are some pictures floating around the forum of the inside of the L99 mufflers. The LS3 muffers are a straight through muffler. The L99 mufflers have this crazy piping on the inside to help reduce AFM noises.

If you follow the piping, you'll notice that the L99 muffler is a straight thru muffler as well. It just has that J pipe on it. That's GM's version of a Helmholtz tube. It works VERY well as you never hear a L99 owner, with the OEM mufflers, complain about drone.

Cruzer1 · 11-02-2010, 05:37 AM

Very well done, glad I am seriously looking at my options for removal.

BigRed585Lbs · 11-02-2010, 06:51 AM

Verrrrrrry interesting!
It seems that the small tube opening in the bottom of the resonator turns the back chamber into a Helmholtz resonator for both pipes, and the high-heat area appears to be a crude x- or h- chamber. Can't accuse Exhaust Engineering Dept. of not trying something different.
I still think that Edelbrock piece is better.

BowlingSS · 11-02-2010, 09:35 AM

So what do you need to replace this resonator? A X-Pipe? Who make them?

Bill

BigRed585Lbs · 11-02-2010, 11:55 AM

See post #21 above.
http://www.camaro5.com/forums/showthread.php?t=113268

BAD DAB · 11-02-2010, 02:05 PM

Good info.

axis · 11-02-2010, 02:10 PM

Quote:

Originally Posted by BowlingSS

So what do you need to replace this resonator? A X-Pipe? Who make them?

Bill

There are several options. The X pipe is the most common and is what I have. I have just the X pipe section and had my muffler guy cut and weld it in with the extra pipe. There's complete replacement X pipe setups, as well a resonated X pipes. I'm sure someone makes a H pipe but I haven't seen one advertised. Depending on which way you go, you're looking at $150+ for the swap.

brantley847 · 11-03-2010, 11:40 AM

How can this be healthy for the car? I am purchasing Kooks LTs and was just going leave the mid piping alone for now, but I don't know if I can justify buying LTs and being that restricted at the mid pipe....good Lord.

Ovenmitt · 11-04-2010, 01:28 AM

Quote:

Originally Posted by Hicompression

Can you pleeeeeaaaaase now cut open an LS3 resonator so we can see what's inside???

The LS3 doesnt have that kind of resonator. It has two small bullets, which are just straight-through pipes with packing in the sides.

jtzako · 11-04-2010, 08:47 AM

I'd love to get rid of my resonator /boat anchor but I dont want the car louder or more 'drone' sounding than it already is.

11-01-2010, 06:58 PM	#15
2010victoryredss_ron Born: August 27, 2009 Drives: 10CAMARO SS,12CRUZE RS,07 YAM R6 Join Date: Aug 2009 Location: Waterloo, Ontario, Canada Posts: 866 View My Garage	finally, one cut open...think mine is going soon __________________ Victory Red 2SS/RS Vin# A9130145

11-01-2010, 07:13 PM	#16
Hicompression Rumbly Bumble Bee Drives: 2010 2SS Camaro Join Date: Aug 2009 Location: DFW Posts: 1,468	Can you pleeeeeaaaaase now cut open an LS3 resonator so we can see what's inside??? __________________ 2010 RALLY YELLOW 2SS 6M -OBX Longtubes FTW!

11-01-2010, 07:29 PM	#17
The_Blur Moderator Drives: 2018 Harley-Davidson Street Bob Join Date: Nov 2007 Location: San Diego Posts: 14,768	This is very interesting. These images definitely give us a good insight into what the L99 guys could do without. GM did a great job making these V8s powerful and sounding good. With a little work, these can sound more aggressive and really reduce the restriction. __________________ RDP Motorsport//GEN5DIY//Cultrag Performance//JPSS//Rodgets Chevrolet// Operation Demon//Buy at Invoice//RACECARWEAR RESPECT ALL CARS. LOVE YOUR OWN. warn 145:159 ban

11-02-2010, 05:37 AM	#20
Cruzer1 Drives: 2010 Blk Supercharged 2SS/RS Join Date: Apr 2010 Location: Westerville, OH Posts: 87 View My Garage	Very well done, glad I am seriously looking at my options for removal. __________________ __________________ Kooks 1 7/8 LT's & full 3" exhaust, Roto-Fab CAI & painted engine covers, TVS 2300 3.4" pulley, MSD BAP, MBRP square exhaust tips and AEM Boost & A/F gauges, Eibach lowering springs, Eibach front & rear sway bars.

11-02-2010, 02:05 PM	#24
BAD DAB Drives: 2010 Camaro 2SS/RS Black & Silver Join Date: Aug 2010 Location: Richmond, VA Posts: 8,230 View My Garage	Good info. __________________ STAINLESS WORKS HEADERS-TUNED BY JANNETTY RACING-C.A.I. INTAKE-TAYLOR 409 WIRES-SOLO AXLE BACK EXHAUST-ELITE CATCH CAN

11-02-2010, 06:51 AM	#21
BigRed585Lbs Drives: Sierra and Tahoe Join Date: Jul 2010 Location: By Marion, MS Posts: 1,324 View My Garage	Verrrrrrry interesting! It seems that the small tube opening in the bottom of the resonator turns the back chamber into a Helmholtz resonator for both pipes, and the high-heat area appears to be a crude x- or h- chamber. Can't accuse Exhaust Engineering Dept. of not trying something different. I still think that Edelbrock piece is better.

11-02-2010, 09:35 AM	#22
BowlingSS Camaro Owner Since 1987 Drives: 2011 2SS/RS L99 RJT Join Date: Jun 2006 Location: Lawrenceville, GA Posts: 2,185	So what do you need to replace this resonator? A X-Pipe? Who make them? Bill

11-02-2010, 11:55 AM	#23
BigRed585Lbs Drives: Sierra and Tahoe Join Date: Jul 2010 Location: By Marion, MS Posts: 1,324 View My Garage	See post #21 above. http://www.camaro5.com/forums/showthread.php?t=113268

11-03-2010, 11:40 AM	#26
brantley847 v It bites. Drives: 2011 IBM 2SS/RS Join Date: May 2008 Location: Orlando, FL Posts: 3,580	How can this be healthy for the car? I am purchasing Kooks LTs and was just going leave the mid piping alone for now, but I don't know if I can justify buying LTs and being that restricted at the mid pipe....good Lord. __________________ 2011 2SS/RS Performance: 439 RWHP: 226/236 Comp Cam, Kooks 1-7/8, CAInc, Borla S type, Vmax TB, Rx Catch Can, Trans cooler, SLP 160 termo, Melling high volume, Eibach Springs/Sways 1" drop, Whiteline complete bushing kit.

11-04-2010, 08:47 AM	#28
jtzako Drives: 2010 IBM Camaro SS Join Date: Jun 2007 Location: DFW, Tx Posts: 1,157	I'd love to get rid of my resonator /boat anchor but I dont want the car louder or more 'drone' sounding than it already is. __________________ 2010 Camaro SS Imperial Blue \| CAI Inc, CAI \| Solo Hi Flow Cats \| X-Pipe \| Backup Camera \| PDIM

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