[Pupilbone]

Originally Posted by Idaho2018GTPremium

My ZL1 arrived last week and I picked it up on Weds. It's amazing! It blows the doors off my 2018 Mustang GT Premium w/ PP1 and MagneRide from an overall performance and feel standpoint. For more of my first impressions, see my vs. thread: https://www.camaro6.com/forums/showthread.php?t=589687.

It is a shadow gray metallic, A10, CF hood insert, Nav., and CF shift knob cover (pics below).

That said, I have a few questions so far:

1. Is there a way to display IAT and manifold air temperatures (i.e., upstream and downstream of the supercharger)?
2. Teen driver mode (for when I drop it off for tint next week): Does this mode reduce power? Is the top speed set point adjustable?
3. I can't really hear much difference between sport and track exhaust levels. Is track just a tad louder? Is it simply that the valve is opened a little more on track vs. sport so the actual sound volume isn't much different?

Thanks!

Nice car, congratulations.

[Trak-Toy]

Excellent choice! These cars are getting harder to find. You got lucky there.

[Crushed 1LE]

Be aware that when valet mode is enabled there is no access to the trunk. Not sure if your tinter will need to get in there.

[Smokin19]

Love that color, congrats.

[Idaho2018GTPremium]

Guys - now that I've owned the ZL1 a couple of months I have a few additional questions and looking for input from other ZL1 owners:

1. In auto mode the car does not downshift into 2nd gear at 35-40 mph when flooring the accelerator. Yesterday I was experimenting and even at 33 mph, when I floored it, it only downshifted into 3rd. Given 2nd gear goes until almost 60 mph, it should downshift into 2nd below about 43 mph, like my Mustang GT did. I can force it into 2nd at 35 mph by flooring it and then clicking the downshift paddle once, knowing it's only going to automatically drop down into 3rd, but then it puts it in manual mode, and that is a clunky way to do it.

2. Has anyone had an issue with a "sticking" trunk deck after pressing the trunk release button? Recently, about 1/5 of the time that I pop the trunk, it doesn't fully release and just makes a small "click" sound, and I have to reseat the trunk (by pressing it down), then when I pop the trunk again it will pop open properly.

3. Has anyone successfully checked to make sure the supercharger coolant line is bled properly at home? I asked the dealer to do this when I picked up the car, but I don't really trust dealers very much so I wanted to check myself.

4. In manual mode, do you ever notice that the torque converter isn't locked up upon half throttle or more application? For example, 30 mph, manual mode, downshift to 3rd gear, roll into 1/2+ throttle...trans isn't locked up and the revs float. Just wondering if this is normal behavior for a ZL1 or not.

Thanks.

[PROMETHEUS]

#3 - Purchase an aftermarket SC coolant tank like the one below, which will allow the SC to self burb, so to speak.

https://lsa-conversion-store.myshopi...sivoir-upgrade

[gtfoxy]

What mode are you in when you say it doesn’t go to second? (Touring, Sport Track)

Also, what is your comp mode in?

[Altered Carbon]

2 months late, but... very nice car, man! Very good purchase in my opinion that no one asked for. I hope someone can answer your questions, because 1, 2 and 4 don't sound like normal things to me. Now then, let's you and me race! All I have is this SS. Seriously though, awesome car.

[Idaho2018GTPremium]

Originally Posted by gtfoxy

What mode are you in when you say it doesn’t go to second? (Touring, Sport Track)

Also, what is your comp mode in?

I was in Tour for the sub-40 mph attempts (33,35,37), but even in Sport at 40 mph it didn't go into 2nd. I didn't try track, but I shouldn't have to change to track to get a good auto start down into 2nd gear at 40 mph IMO, esp. at sub-40 mph auto starts. 2nd gear at 40 mph is only about 4,100 rpm IIRC, so it should easily go into 2nd from a 40 roll regardless of the mode. And not going into 2nd at 33 mph even in tour mode is silly. That's like 3,500 rpm.

[radz28]

Originally Posted by Idaho2018GTPremium

Guys - now that I've owned the ZL1 a couple of months I have a few additional questions and looking for input from other ZL1 owners:

1. In auto mode the car does not downshift into 2nd gear at 35-40 mph when flooring the accelerator. Yesterday I was experimenting and even at 33 mph, when I floored it, it only downshifted into 3rd. Given 2nd gear goes until almost 60 mph, it should downshift into 2nd below about 43 mph, like my Mustang GT did. I can force it into 2nd at 35 mph by flooring it and then clicking the downshift paddle once, knowing it's only going to automatically drop down into 3rd, but then it puts it in manual mode, and that is a clunky way to do it.

That's interesting... I've never tried that, because I've been sure it would just blow the tires-off, but since the 2-3-shift is around 60, I can't see why it wouldn't. Knowing the modes you've tried this in could be helpful, too, as asked already. It could be if you aren't in Sport, Competition Mode isn't active, and it just won't let you. I never tried this, stock, though, for the reason I already said, ha.

2. Has anyone had an issue with a "sticking" trunk deck after pressing the trunk release button? Recently, about 1/5 of the time that I pop the trunk, it doesn't fully release and just makes a small "click" sound, and I have to reseat the trunk (by pressing it down), then when I pop the trunk again it will pop open properly.

It sounds like maybe the striker or deck lid needs to be adjusted. Also - I think there are rubber snubs on the underside of the decklid, that are on either side of the latch. Check that those are there.
I wonder if they could be missing, not giving the decklid compression to pop-open. I'm thinking maybe even checking the weatherstrip, too. That doesn't sound normal to me.

3. Has anyone successfully checked to make sure the supercharger coolant line is bled properly at home? I asked the dealer to do this when I picked up the car, but I don't really trust dealers very much so I wanted to check myself.

There are videos on how to do this, but you'll probably need a good funnel, or other-type device to help bleed. Once you see a video (you probably already have), it isn't that hard. It'll be messier than it it is hard. Get that reservoir, too

4. In manual mode, do you ever notice that the torque converter isn't locked up upon half throttle or more application? For example, 30 mph, manual mode, downshift to 3rd gear, roll into 1/2+ throttle...trans isn't locked up and the revs float. Just wondering if this is normal behavior for a ZL1 or not.

I can't tell you if what you're experiencing is normal for this car (I don't recall ever seeing those tables - probably because of the T93 TCM), but I can tell you on other cars, sometimes they don't lock the converter until certain gears or speeds. I've never really noticed though.
I'll have to go and check these behaviors next time I go out...

Thanks.

Sorry I couldn't be more helpful... I don't drive the car too much to really stay familiar with it's nuances (bought mine in 09/19 and it just passed 1700-miles, lol). That trunk-thing is interesting, but probably pretty simple. It might be worth a warranty claim.

[Idaho2018GTPremium]

As a follow-up question to my #1 above: Could this have to do with the fact that I babied it (for the most part) during the first 1,100 miles, and now when I try to get on it, the computer thinks I don't really want to give it the beans? I wonder if it learned that less aggressive driving style during break in and if a battery disconnect/reconnect is in order so it can "reset" and relearn my driving style now that I'm willing to push it harder?

[gtfoxy]

Being in track mode impacts shifting.

Also, the PTM modes, from wet to race impact back shifting & torque modulation.

I have never done your exact MPH/ gear test, but from what I know of planetary sets what you may be asking it to do, if not a function of prior mentioned PTM modes, may be a mapping juncture where GM said, “Yeah, at that torque request & gear change it puts too much stress on the planetaries, clutches & shafts, so none of that.”

[Idaho2018GTPremium]

Originally Posted by radz28

Sorry I couldn't be more helpful... I don't drive the car too much to really stay familiar with it's nuances (bought mine in 09/19 and it just passed 1700-miles, lol). That trunk-thing is interesting, but probably pretty simple. It might be worth a warranty claim.

Thanks for the input. I will check the trunk stuff.

Originally Posted by gtfoxy

Being in track mode impacts shifting.

Also, the PTM modes, from wet to race impact back shifting & torque modulation.

I have never done your exact MPH/ gear test, but from what I know of planetary sets what you may be asking it to do, if not a function of prior mentioned PTM modes, may be a mapping juncture where GM said, “Yeah, at that torque request & gear change it puts too much stress on the planetaries, clutches & shafts, so none of that.”

I understand the different modes affect throttle mapping and shifting although I haven't played with them that much yet. However, I firmly believe if I'm going 35 mph and romp on it, it should downshift to 2nd gear (even in tour) considering it's not even close to the top of 2nd at that speed. I'm going to try disconnecting the battery and having it "relearn", so to speak, to "broken in" driving habits.

Originally Posted by Altered Carbon

2 months late, but... very nice car, man! Very good purchase in my opinion that no one asked for. I hope someone can answer your questions, because 1, 2 and 4 don't sound like normal things to me. Now then, let's you and me race! All I have is this SS. Seriously though, awesome car.

Thanks! Although, I don't think my stock ZL1 will put up much of a fight against a 1174 rwhp SS in a straight line!

[gtfoxy]

Originally Posted by Idaho2018GTPremium

Thanks for the input. I will check the trunk stuff.



I understand the different modes affect throttle mapping and shifting although I haven't played with them that much yet. However, I firmly believe if I'm going 35 mph and romp on it, it should downshift to 2nd gear (even in tour) considering it's not even close to the top of 2nd at that speed. I'm going to try disconnecting the battery and having it "relearn", so to speak, to "broken in" driving habits.



Thanks! Although, I don't think my stock ZL1 will put up much of a fight against a 1174 rwhp SS in a straight line!

Try putting it in one of the bottom three comp modes in track, then do a quick double jab on the throttle, which will activate comp shift mode. Then hammer it.