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Old 08-24-2023, 02:34 PM   #379
SOCAL.M6.ZLE
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Originally Posted by JSH View Post
My factory suitcase is for sale.

Me too
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2022 M6 ZLE: Katech CNC Ported Blower + Ported Heads + 103mm TB + Oil Pump + C5R Chain + Valve Covers + Coil Relocation
TSP VVT and DoD Delete Covers + LME Chain Guide + DSX Billet Lid + ATI Damper + 9.17" Lower + 2.4" Upper + MM Wild CC
Coated ARH + AWE Touring + Magnaflow Center X + E85 + MSD Coils + Banks iDash + JMS Booster + Synergy Fender Tank
ALL the RED Rear End BMR Goodies + JRE Terminator Cam Package + Remote Tuning and Moral Support from TED @ JRE
BMR Motor Mounts + DMS Front HX + FIC 30's + APEX SM.10's + 305/345 R888R's = 770rwhp 785rwtq @E50 13.5psi
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Old 09-16-2023, 10:14 PM   #380
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I just did this mod but took a different spin on it. The guy who did the work at the exhaust shop ii took it to.. perfect man. Configured it exactly how I wanted him to and he made it all modular so it would be easy to disassemble when and if it's time to do upper work somewhere else on the car. Instead of the Jones X- Pipe I used a Black Widow Angry Housewife compact muffler and tucked it into the tunnel. I just needed to knock down a few DB's, it got rid of the initial bite at start up that would earthquake the inside of the house, and kill the highway drone. This was just enough to do it for me. Granted, your situation may and will be different but this worked great for me all the way through.

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2017 Red Hot ZL1 A10 - Apex ARC-8's, 305/ 325 PS4's, DSX 9.06 12% Pulley, NGK HR7 Ruthenium spark plugs, Katech Oil Pump, LME tensioner, DOD delete, Cam, MPI lid, Soler ported 87mm (91mm effective) TB, Granatelli SS plug wires, Cordes LTR reservoir, DMS T-stat housing, Borla X pipe, AFe NPP exhaust, Black Widow Angry Housewife/ Venom 250 mufflers, BMR engine mounts, Banks iDash, Lithium Battery, Course Motorsports phone mount, AEM X- Series, HP Tuners, JMS, E85, 13.6 psi
737 HP/ 779 TQ

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Old 09-21-2023, 09:06 AM   #381
UberTong
 
Drives: Chevy Camaro ZL1
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Originally Posted by Sakudog View Post
(Scroll to the bottom for pics)

Recently had a set of Kooks 2" long tubes headers installed to complement the Magnuson 2650R to build a reliable/safe track-focused power band. The results were exactly what I wanted, the car makes ~700 rwhp through the automatic and the power delivery is super smooth. Nothing tricky about the setup, just a 2650R on an all-stock motor with LTs, 93 octane, through the A10.

All of that was great, but it was just too damn loud for me, my neighbors, likely any track with any type of noise restriction, etc. To maximize my enjoyment out of the car, I needed to make a change. After some careful research, I settled in on adding a Magnaflow X-pipe muffler where the factory X-pipe was, replacing it with the Magnaflow X. I kept reading people trying to resonators to remove the high pitch rifle shot sound when mixing NPP and LTs but the effect being minimum on DBs and tone.

https://www.magnaflow.com/products/1...rmance-muffler

The end results are FANTASTIC and exactly what I wanted. The car has a mild startup, the ear-piercing BARK when the car roars to life is completely gone. That sound was okay I guess when the car was 100% stock, but after the LTs it was really difficult to live with for me and my 3 year old.

The car now has a much more mellow note and until you add in a lot of throttle, the car is actually really reasonable. Once the exhaust gas picks up speed, the X-Muffler can do less to lower the DBs but the tone is still deeper. So the exhaust, under load still gets VERY loud, louder than stock. However, now you can take a drive in the car and have a regular conversation with a passenger, listening to music or talk on the phone no problem, actually better than stock in that regard.

I realize some of you WANT your cars to be very loud and you enjoy that part of your car. Coming from an 1100 rwhp TT ZL1 and a Buick Grand National before that, loud and fast don't go together for me like it does for some of you, that's a personal thing.

In addition, now that I'm a total track ratt, listening to an ULTRA loud car @ 100% throttle for 20 minutes a day, 6 times a day, isn't fun, even with my helmet on.

(Some may ask, why to keep the stock NPP muffler and I'll give you my 2 reasons. #1 the aerodynamics of the car is affected slightly by removing the suitcase muffler and adding aftermarket mufflers. A void is created where the muffler once sit, disrupting airflow. This may not be an issue for you on your track, but COTA is a high-speed track and after 130mph to about 160mph the rear bumper shakes violently as air pressure catches the bumper cover and tries to pull it off, buffeting it and making it shake, causing lift and slowing the car down. Once you go away from that muffler, you end up adding a diffuser to cover the gap it left, that was a bunch of steps I didn't want to take to make my car even loud. #2 "weight savings isn't there" the stock NPP muffler by itself actually doesn't weigh that much, weight savings is typically negated w/a stainless system, unless you're going to a FULL race setup, which means no muffler and as you could guess, that isn't going to work for me, most tracks, my wife, child or my neighborhood. )

I hope this helps some of you who, like me, thought the exhaust note was TOO loud for Track use or just wanted it to be quieter but still enjoyable.


Start-up videos:

Outside



Inside



Partial throttle, higher RPM, light pulls:


Thank you, I've been looking for just this solution. I bought mine telling myself I'd get used to it. I've had loud and fast before I just can't enjoy my ZL1 like I want to. I've got 4 kids under 10 and leave early in the am. I've got 2" CSP headers no cats, straight back into AWE track system...it's loud. I hope this fixes that crazy cold start bark and just chills out the drone and noise. Thank you!
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Old 09-21-2023, 09:20 AM   #382
Z OH 6


 
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Quote:
Originally Posted by UberTong View Post
Thank you, I've been looking for just this solution. I bought mine telling myself I'd get used to it. I've had loud and fast before I just can't enjoy my ZL1 like I want to. I've got 4 kids under 10 and leave early in the am. I've got 2" CSP headers no cats, straight back into AWE track system...it's loud. I hope this fixes that crazy cold start bark and just chills out the drone and noise. Thank you!
I bet your car is ridiculously loud. It doesn't help that you have no mufflers at all. I can tell you that even installing the Magnaflow in your exhaust system probably isn't going to do everything you want since you still have no rear mufflers with the AWE track system. Having no cats also adds a lot of volume. I have 2" headers, high flow cats, and AWE resonated touring exhaust and its still very loud. I like it where it is though.
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Old 09-21-2023, 02:37 PM   #383
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I probably posted this before but the thread is so long. I've lost track. Mine has Kooks long tubes, crimp deletes, and Kooks axle back that has a small muffler and I passed it 18-wheeler today at WOT with the passenger window cracked and it sounded like a pro stocker. Way too loud for a DD. I need to put cats on it
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'20 ZL1 1LE A10,
OEM short block, LME heads/valve train, E2650.
100+ octanes, no eth, no meth, no N2O.
2/23 - 1031/1004 wheel.
4/23 - 1.41/9.61/145 at DA 7000 ft. (only made five passes).
2/24 - LME 390, E2650, FBO, 100 oct.; 1116hp/ 1063tq; 109 oct. dyno next.
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Old 09-21-2023, 03:14 PM   #384
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ANC needs to be disconnected in conjunction with your exhaust mods people. I know it's been talked about in other parts of the forum, but it needs to be addressed yet again.

https://www.camaro6.com/forums/showthread.php?t=619862
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2017 Red Hot ZL1 A10 - Apex ARC-8's, 305/ 325 PS4's, DSX 9.06 12% Pulley, NGK HR7 Ruthenium spark plugs, Katech Oil Pump, LME tensioner, DOD delete, Cam, MPI lid, Soler ported 87mm (91mm effective) TB, Granatelli SS plug wires, Cordes LTR reservoir, DMS T-stat housing, Borla X pipe, AFe NPP exhaust, Black Widow Angry Housewife/ Venom 250 mufflers, BMR engine mounts, Banks iDash, Lithium Battery, Course Motorsports phone mount, AEM X- Series, HP Tuners, JMS, E85, 13.6 psi
737 HP/ 779 TQ

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Old 09-21-2023, 08:36 PM   #385
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Quote:
Originally Posted by ZLRob View Post
Never heard of ANC
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'20 ZL1 1LE A10,
OEM short block, LME heads/valve train, E2650.
100+ octanes, no eth, no meth, no N2O.
2/23 - 1031/1004 wheel.
4/23 - 1.41/9.61/145 at DA 7000 ft. (only made five passes).
2/24 - LME 390, E2650, FBO, 100 oct.; 1116hp/ 1063tq; 109 oct. dyno next.
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Old 09-21-2023, 09:05 PM   #386
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Quote:
Originally Posted by JSH View Post
Never heard of ANC
If you are still experiencing some excessive noise in the cabin you may want to give that mod a try. It shifted the DB low frequency Hz output spectrum for me enough to the point where I don't feel like my ears are going to explode at lower RPM's and the car is actually pleasurable to drive again on the road and on the freeway now.
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2017 Red Hot ZL1 A10 - Apex ARC-8's, 305/ 325 PS4's, DSX 9.06 12% Pulley, NGK HR7 Ruthenium spark plugs, Katech Oil Pump, LME tensioner, DOD delete, Cam, MPI lid, Soler ported 87mm (91mm effective) TB, Granatelli SS plug wires, Cordes LTR reservoir, DMS T-stat housing, Borla X pipe, AFe NPP exhaust, Black Widow Angry Housewife/ Venom 250 mufflers, BMR engine mounts, Banks iDash, Lithium Battery, Course Motorsports phone mount, AEM X- Series, HP Tuners, JMS, E85, 13.6 psi
737 HP/ 779 TQ

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Old 09-22-2023, 08:50 AM   #387
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Quote:
Originally Posted by ZLRob View Post
If you are still experiencing some excessive noise in the cabin you may want to give that mod a try. It shifted the DB low frequency Hz output spectrum for me enough to the point where I don't feel like my ears are going to explode at lower RPM's and the car is actually pleasurable to drive again on the road and on the freeway now.
So, ANC is still on when the stock sound system is turned off?
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'20 ZL1 1LE A10,
OEM short block, LME heads/valve train, E2650.
100+ octanes, no eth, no meth, no N2O.
2/23 - 1031/1004 wheel.
4/23 - 1.41/9.61/145 at DA 7000 ft. (only made five passes).
2/24 - LME 390, E2650, FBO, 100 oct.; 1116hp/ 1063tq; 109 oct. dyno next.
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Old 09-22-2023, 08:52 AM   #388
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Yes it seems that way
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Old 09-22-2023, 10:02 AM   #389
ZLRob
 
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Quote:
Originally Posted by JSH View Post
So, ANC is still on when the stock sound system is turned off?

Yeah it's present at all times.
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2017 Red Hot ZL1 A10 - Apex ARC-8's, 305/ 325 PS4's, DSX 9.06 12% Pulley, NGK HR7 Ruthenium spark plugs, Katech Oil Pump, LME tensioner, DOD delete, Cam, MPI lid, Soler ported 87mm (91mm effective) TB, Granatelli SS plug wires, Cordes LTR reservoir, DMS T-stat housing, Borla X pipe, AFe NPP exhaust, Black Widow Angry Housewife/ Venom 250 mufflers, BMR engine mounts, Banks iDash, Lithium Battery, Course Motorsports phone mount, AEM X- Series, HP Tuners, JMS, E85, 13.6 psi
737 HP/ 779 TQ

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Old 02-27-2024, 10:46 PM   #390
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Looking for ideas on how to build a diffuser under the rear bumper. With the AWE mufflers it opens the backside of the rear bumper up. Making it trap air at high speeds.
Pic is not mine but same setup.
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Old 03-03-2024, 05:22 PM   #391
Mikesvt04
 
Drives: ZL1 1LE
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I order the Jones muffler from Amazon (sold by verocious motorsports. I ordered one from jegs too.

I emailed verocious motorsports yesterday about the x muffler. I'll see what they say.

Anyone use the flowmaster FX part # 72469. Says it's a straight through x.
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Old 03-03-2024, 05:56 PM   #392
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Originally Posted by Mikesvt04 View Post
flowmaster FX part # 72469. Says it's a straight through x.
I was looking at those Flowmasters too...

Opted to get the GESI cats and still have the MRBP to take the edge off. But I may still look into these and swap with V-Band Clamps to have more options.

Needed to get some Laguna pipes made to trim some sound off in Monterey.
So, if those Flowmasters work, it would certainly be better... but options are a good thing.
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