06-25-2018, 12:53 PM | #1 |
Drives: 2018 Red ZL1 Join Date: Mar 2018
Location: Spring grove IL
Posts: 190
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Anybody do LT's, Cat Del and aftermarket exhaust in Northern IL?
Hey Guys
Posted last week after i did Kooks LT's, off road pipes, pulley, tune, etc. Kept stock muffler in effort to keep as quiet and adjustable as possible. Not liking the sound with this new combo and the stock muffler. Tinny, raspy, Blatt.... When in Tour, it's pretty quiet. Not far off stock. I could go with louder growl here...When the NPP valves open, holy crap!. Too loud for me...(i know i'll get crap for that comment!). I have read a bunch here, called Borla and Phastek, and it all looks like i need to find someone who has these mods and has a Borla/Corsa/etc and hear how it sounds. The guy at Borla says anything i do will make it WAY louder. From the stock muffler in Tour, yes i'd agree...and that's OK. Once the valves open, it's hard to believe it can get louder. Some say keep NPP, some say get rid of to keep quieter overall... I'm OK with louder/deeper than Tour Mode, but looking for "Better" sounding than the stock muffler now when valves are open (and closed for that matter). Even if I can't get quieter, have a deeper tone. Anybody close to Northern Illinois and willing to let me hear your setup? They all recommend hearing in-person as sound clips just don't reproduce accurately. Thanks! Jim |
06-25-2018, 03:43 PM | #2 |
Drives: Fast Join Date: Mar 2015
Location: Michigan
Posts: 3,696
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I'll just jump in and say the guy from Borla took the words out of my mouth. You're not going to quiet it down or get rid of much of the sound characteristics. A Corsa system is going to make it louder, but will take away some of the rasp/farty/tinny sound as well as any drone. But it's going to be loud as hell at WOT.
Same thing for a Borla system. The only thing I can think of is adding a resonated X Pipe like people did on the 5th gens but I'm not sure if anybody makes one yet for the 6th gens. |
06-25-2018, 04:58 PM | #3 |
Drives: 2018 Red ZL1 Join Date: Mar 2018
Location: Spring grove IL
Posts: 190
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The guy from Borla said the same, put my stock resonators back on. To be honest, I'm not sure my Tuner/installer pulled them off. We did have a discussion about the second set of Cats...are they resonators or cats? My installer said they pulled 4 cats off. So are there resonators too? The Borla dude said there are 4 cats and separate resonators and a muffler. Guess i should crawl under and look...
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06-25-2018, 05:08 PM | #4 | |
Drives: Fast Join Date: Mar 2015
Location: Michigan
Posts: 3,696
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06-27-2018, 11:55 AM | #5 |
Drives: 2018 Red ZL1 Join Date: Mar 2018
Location: Spring grove IL
Posts: 190
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No luck yet on finding one local to hear, but talking w/the different Reps sounds like the CORSA axle back is the one for me. Will be louder than with current NPP's closed (that's fine) but should be a bit quieter than with the NPP's open (straight headers).
Being that these don't have the NPP's, will it throw some kind of code? Thanks |
06-27-2018, 12:07 PM | #6 |
Drives: 6th Gen NicKey Camaro & others. Join Date: Nov 2015
Location: Loves Park, Illinois
Posts: 492
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I'm going with the full ARH system on my ZL1, cat-delete. My SS has ARH long system into stock muffler, but with a NicKey Stage I cam.
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06-27-2018, 12:40 PM | #7 | |
Drives: Fast Join Date: Mar 2015
Location: Michigan
Posts: 3,696
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06-27-2018, 01:08 PM | #8 |
Drives: 2018 Red ZL1 Join Date: Mar 2018
Location: Spring grove IL
Posts: 190
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Wow, That's a cool pic!
So looks to get some straight and some bleeding when open. Damn...still probably need to hear one live before i drop ~ $1500 and make it louder still! Thanks for the advice! |
06-27-2018, 02:44 PM | #9 | |
Drives: Fast Join Date: Mar 2015
Location: Michigan
Posts: 3,696
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There's no system that's quieter than stock. Quite simply, everybody is after an axle-back for more volume. Once headers are tossed into the picture, it multiplies everything sound-wise. I don't think there's any restriction such as cats/resonators/mufflers that you could safely add without risking back pressure problems, high heat build up, melting, etc. Learn to love it, or put it back to stock. You could try a set of GESI cats but they're expensive. They will tone the sound/rasp down some but like I said, probably north of $1000 all said and done. And they're the only cats I would trust that will last and hold up for a while. |
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06-27-2018, 02:52 PM | #10 |
Drives: 2018 Red ZL1 Join Date: Mar 2018
Location: Spring grove IL
Posts: 190
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Yeah, I was going to go Kooks greens, but my tuner talked me out of it. Said even those would fail eventually.
Guess I will find out soon. Going with Corsa Sport on Friday. Have a 1/2 mile race in Battle Creek, MI on July 2 so will be cool for that at least... That cutaway pick you sent was great. Got to be some straight through action even though it's vented a bit. Again, will find out shortly! Thanks again |
06-27-2018, 03:34 PM | #11 | |
Drives: Fast Join Date: Mar 2015
Location: Michigan
Posts: 3,696
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06-27-2018, 04:46 PM | #12 |
Drives: 2018 Red ZL1 Join Date: Mar 2018
Location: Spring grove IL
Posts: 190
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Yes public can attend. It's actually a huge week-long airshow with some racing mixed in. The site BCSpeedFest says spectators can buy tickets on site.
I was one of last to get in, that's why racing on 3rd. I have 2 sessions on Tues July 3. Some BA cars racing. There's a 2600hp Lambo Hurracan in the group. Also GTR's, GT350, GT500, Hellcat's, Z06's...and a couple ZL's... Should be cool as hell. |
06-27-2018, 04:49 PM | #13 | |
Drives: Fast Join Date: Mar 2015
Location: Michigan
Posts: 3,696
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2600 HP seems to be the highest I've ever heard for those TT V10 cars. UGR only mentions 2200 or so on their "kill" setup that does 255+ MPH consistently. |
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07-18-2018, 01:25 AM | #14 |
Drives: Track prepped 2018 Camaro ZL1 (a10) Join Date: Aug 2013
Location: Victoria B.C. Canada
Posts: 1,384
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Jimabe, so what’s the verdict on the Corsa Sport with LT Headers combo compared to the stock NPP?
Your thoughts?
__________________
2018 ZL1; Mag 2650 and 2 inch LT Headers , every SPL suspension upgrade, MCS 2 way coilovers, sway bars, square SC3R 325's all the way around, and multiple brake cooling upgrades
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