02-24-2019, 02:24 PM | #29 |
Drives: 20 X3M CP & 19 ZL1 1LE A10 Join Date: Jun 2013
Location: Brenham, TX
Posts: 3,517
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That’s why America is great. We have choice.
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02-24-2019, 03:27 PM | #30 | |
2019 ZL1 1LE MY GOON
Drives: 1980 Z28 Big Red. Join Date: Dec 2018
Location: Stoney Creek
Posts: 2,061
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Quote:
What would happen if you were to install long tubes and an aftermarket exhaust without having it tuned? Would the engine run too lean or something? |
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02-24-2019, 03:46 PM | #31 |
Drives: 2018 ZL1 Coupe NFG M6 Join Date: May 2017
Location: Nolensville, TN
Posts: 618
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Yep, gotta tune it.
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1989 Forumla 350 WS6 <- High School
2000 Trans Am Firehawk <- After High School 2017 Colorado Z71 <- Daily 2018 ZL1 M6 <- Not Daily |
02-24-2019, 03:58 PM | #32 |
2019 ZL1 1LE MY GOON
Drives: 1980 Z28 Big Red. Join Date: Dec 2018
Location: Stoney Creek
Posts: 2,061
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Has anyone tried installing the LTs to the stock exhaust and not done a tune?
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02-24-2019, 03:59 PM | #33 |
2019 ZL1 1LE MY GOON
Drives: 1980 Z28 Big Red. Join Date: Dec 2018
Location: Stoney Creek
Posts: 2,061
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I’m trying to avoid losing my warranty for a bit
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02-24-2019, 04:01 PM | #34 |
Drives: Fast Join Date: Mar 2015
Location: Michigan
Posts: 3,696
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Yep.
Headers or primary cat deletion (which Headers accomplish on their own) require a tune. If you don’t want a tune and want it as loud as possible, you can get a full catback that bolts to the back of the primaries and deletes the secondary cats. Borla and Corsa and AWE and others offer it. Axle backs or short X pipes do not do the same job. |
02-24-2019, 04:03 PM | #35 | |
2019 ZL1 1LE MY GOON
Drives: 1980 Z28 Big Red. Join Date: Dec 2018
Location: Stoney Creek
Posts: 2,061
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Quote:
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02-24-2019, 05:30 PM | #36 |
Drives: ZL1/335i Join Date: Apr 2014
Location: Santa Barbara
Posts: 870
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It shouldn’t, as they are not monitored. Modifying anything without tuning is always a gamble, though.
And definitely don’t do headers without tuning. It actually won’t run lean or be dangerous at all (confirmed no change in AFR on my car), but you will likely get a check engine light that will be a bitch to get rid of — even if you decide to tune it later. |
02-24-2019, 06:00 PM | #37 |
Drives: Fast Join Date: Mar 2015
Location: Michigan
Posts: 3,696
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02-24-2019, 06:33 PM | #38 |
Drives: 18 ZL1-1LE, 10 JKU Join Date: Jul 2018
Location: AR
Posts: 583
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That black ZLE with the LG headers sounds perfect! If I was ready to tune I'd just have done that.
I put mine up on the lift today, plan on installing a stainless works catback this week when I get spare time. Doesn't look to be a popular choice, but keeps my NPP and I liked it better than the borla, or simply losing the option completely. I came from a 350 also and I feel like I can barely hear this car sometimes, even with the fuse pulled. I may rig up an actual on/off switch for the valve too, I can't stand how the car will close it sometimes even in track mode. Just gotta see how loud this catback is first. Last edited by jvandy50; 02-24-2019 at 07:47 PM. |
02-25-2019, 09:44 AM | #39 |
Drives: 2016 Challenger Hellcat, 2018 ZL1LE Join Date: Dec 2009
Location: Northern NJ
Posts: 3,003
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I also wish my ZLE was louder. The tone of the exhaust is perfect, I like when after the throttle input reaches a certain point in highway cruising the exhaust gets deeper.
The volume is just too low. I’ll probably keep the stock mufflers and just do long tube headers in hopes of getting the volume up but keeping the stock tone of the exhaust. By the way, I am one of those that loves the way the 350R sounds. It’s one of the main reasons I’m considering one.
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2016 Challenger Hellcat /B5 blue/Sepia interior/Brass Monkey Wheels/
2018 ZL1 1LE/Red hot 2019 Shellby GT 350R/ Oxford white/ Matte Black Stripes/ Carbon Fiber Dash/ Electronics Package #413 |
02-25-2019, 12:34 PM | #40 | ||
Drives: ZL1 1LE A10 Join Date: Mar 2015
Location: CA
Posts: 1,093
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Quote:
Quote:
2015 ZL1 had audible knock on CA91 octane gas. The car always maxxed out the knock retard under medium-heavy throttle. I had to have the car tuned and voided my warranty but then it ran excellent. 2017 Grand Sport Rod Knock on Cyl #5 -- engine replaced under warranty. After the swap, it happened again on another cylinder (I forget which) so I gave the car back to them. 2017 Z06 Strong hesitation issues when applying moderate throttle around 4k RPM in gears 3,4,5,6,7. Dealership was never able to resolve it even though they did reproduce it. Guesses were fuel pump, traction control sensors, limited slip, etc. 2018 ZL1 1LE So far so good but I'm only at 1100 miles. However I did crash it after 4 days of ownership. Some dude forced me into a center divider and trashed the entire front end. $16k worth of damage. But that wasn't the car's fault EDIT: I believe the 2015 ZL1 was just an issue where the ZL1 didn't like CA91 gas as it was tuned for 93 which we don't get in CA. The Grand Sport was just bad luck, it happens. The Z06 is the one that really pissed me off because I had the car a year and they couldn't fix it. But it probably wasn't engine issues.
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Current: 2019 ZL1 1LE A10 Mods: MPS4s Tires | Borla Atak | CF Steering Wheel Previous: 2018 ZL1 1LE M6 | 2017 Z06 Z07 M7 | 2017 GS A8 | 2015 ZL1 M6 | 2013 GT500 |
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02-25-2019, 12:43 PM | #41 |
Drives: 69 GTO, 05 GTO, 2018 Silver ZL1 Join Date: Jan 2012
Location: Springfield, OH
Posts: 847
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Kooks 2", no cats, Flowmaster Outlaw NPP.
I got on it alittle at the end... With the NPP, the programming adjusts the valves to help eliminate any drone or rasp. Mine has a 2 sec rasp at 1600rpm and the valves adjust it out. You DO NOT want to pull the fuse with this setup...it is RAW, even for me! In Stealth mode it is docile. https://youtu.be/zAbIx33_CzY |
02-25-2019, 12:52 PM | #42 | |
Drives: ZL1 1LE A10 Join Date: Mar 2015
Location: CA
Posts: 1,093
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Quote:
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Current: 2019 ZL1 1LE A10 Mods: MPS4s Tires | Borla Atak | CF Steering Wheel Previous: 2018 ZL1 1LE M6 | 2017 Z06 Z07 M7 | 2017 GS A8 | 2015 ZL1 M6 | 2013 GT500 |
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