[ICTsccaCamaro]

Originally Posted by Mountain

Thanks you rlarsen462 for posting the information about the trunk kit parts (along with pictures), as I have been poking around to get the part numbers of these parts.

Also, thanks to ICTsccaCamaro for going ahead with spearheading the install of the steering gear vents on their none-ZL1 car. From my understanding, these should be a direct bolt-on to the SS cars as well.

Mine is ZL1 1LE if that matters.

[rlarsen462]

Originally Posted by Mountain

I will be getting these for my SS 1LE, also, as I plan to track my car a lot. I do not drive my car in the winter, driving spring through fall, and see no reason to remove these unless you were to drive through a lot of standing water or snow. Outside of that, I have a hard time seeing typical rain doing anything. The "ducts" are more "vents"; in that, exhausting temperature/pressure and not inducting...

*EDIT: Actually, it appears I am wrong. The orientation of these are to be a "duct" or "scoop". They will be a true track only/none-rain/snow item.

While I was under the car I made the same observations when I was installing the front splitter air deflector kit and rear control arm covers the other day. I elected to leave off the power steering cooler until I'm actually taking it to the track, due to the design.

My real question is, because it's SO confusing, are you supposed to put the little "air deflector tire dams" ON, or OFF for maximum performance/track use?

I'm talking about these pieces:



Most have said they are for fuel economy and to leave them OFF for track driving...however the 2018 track preparation guide (there doesn't seem to be an equivalent document for 2019's yet) has this to say:

UNDERBODY AIR DEFLECTOR TIRE DAM KIT

Model: Camaro ZL1 Coupe and Camaro ZL1 with the 1LE Performance Package

The Underbody Air Deflector Tire Dam Kit provided with Camaro ZL1 vehicles helps reduce the amount of aerodynamic lift
on the front axle for optimum handling.

Please note: The Underbody Air Deflector Kit is installed at the time of Pre-Delivery Inspection (PDI) and is to remain on the car.

[Dave-ROR]

Originally Posted by rlarsen462

While I was under the car I made the same observations when I was installing the front splitter air deflector kit and rear control arm covers the other day. I elected to leave off the power steering cooler until I'm actually taking it to the track, due to the design.

My real question is, because it's SO confusing, are you supposed to put the little "air deflector tire dams" ON, or OFF for maximum performance/track use?

I'm talking about these pieces:



Most have said they are for fuel economy and to leave them OFF for track driving...however the 2018 track preparation guide (there doesn't seem to be an equivalent document for 2019's yet) has this to say:

UNDERBODY AIR DEFLECTOR TIRE DAM KIT

Model: Camaro ZL1 Coupe and Camaro ZL1 with the 1LE Performance Package

The Underbody Air Deflector Tire Dam Kit provided with Camaro ZL1 vehicles helps reduce the amount of aerodynamic lift
on the front axle for optimum handling.

Please note: The Underbody Air Deflector Kit is installed at the time of Pre-Delivery Inspection (PDI) and is to remain on the car.

It's confusing but the curved ones should always stay on, the straight ones up front get removed.

[Vtor_ZL1]

Ah yes, the corner rub strips or driveway warning contact strips.

[rlarsen462]

Originally Posted by Dave-ROR

It's confusing but the curved ones should always stay on, the straight ones up front get removed.

And that's the forum consensus, I agree, however the track prep guide definitely calls the straight pieces the "Underbody Air Deflector Tire Dam Kit" and says to put it on for performance/track driving because it reduces aero lift on the axle.

The curved pieces are the just the "The Underbody Air Deflector Kit" and it says those are installed on PDI and left on the vehicle.

Clear as mud I tell ya.

I just want to put on (and leave on) everything that maximizes handling, and take off anything that is for fuel economy, etc. not related to getting max performance from the car. With the exception of those parts like the water deflector and power steering cooler that could create water problems with street driving.

[rlarsen462]

Originally Posted by Vtor_ZL1

Ah yes, the corner rub strips or driveway warning contact strips.

The big center rubber strip hits way before those pieces in the corner ever would, I would think?

[Dave-ROR]

Originally Posted by rlarsen462

And that's the forum consensus, I agree, however the track prep guide definitely calls the straight pieces the "Underbody Air Deflector Tire Dam Kit" and says to put it on for performance/track driving because it reduces aero lift on the axle.

The curved pieces are the just the "The Underbody Air Deflector Kit" and it says those are installed on PDI and left on the vehicle.

Clear as mud I tell ya.

I just want to put on (and leave on) everything that maximizes handling, and take off anything that is for fuel economy, etc. not related to getting max performance from the car. With the exception of those parts like the water deflector and power steering cooler that could create water problems with street driving.

GM's own documentation contradicts itself. The other manual shows the same picture and mentions reinstalling them after using the car at the track.

Clear as mud is right

[rlarsen462]

Originally Posted by Dave-ROR

GM's own documentation contradicts itself. The other manual shows the same picture and mentions reinstalling them after using the car at the track.

Clear as mud is right

I'm just going to through them in the trash and never think about them again, I think...honestly logic tells me that they are blocking/deflecting air away from the curved pieces which serve to prevent air from loading up under the tires/axles, meaning the straight pieces can't really be serving a positive purpose under speed.

[Dave-ROR]

Originally Posted by rlarsen462

I'm just going to through them in the trash and never think about them again, I think...honestly logic tells me that they are blocking/deflecting air away from the curved pieces which serve to prevent air from loading up under the tires/axles, meaning the straight pieces can't really be serving a positive purpose under speed.

Yeah they aren't on my car either

[waterman]

I hope that this does not sound pretentious, that is not my intention.

I would encourage all that own this machine to put your car on stands and spend some quality time on your creeper exploring the magnificent underbelly of this car. It is likely to give you a bigger chubby than the shiny side. An appreciable amount of time spent there may reveal the answers to all of your questions and concerns about aero on the underside of the ZLE.

With that said; 84669205 is new for 2019 and looks amazingly functional and beneficial. Those of us that have spent time on the creeper get it. I'm looking forward to your impressions ICTsccaCamaro. Thanks in advance.

IMHO, the center air dam (center, under the splitter) rubs WAY before the outside dams do. The outboard dams do not in any way protect the outboard curved deflectors. Keep the curved deflectors and center air dam on the parts shelf boys, they get scuffed and occasionally hit hard, even when driving conservatively. Fortunately the plastic aero sections under your splitter are readily available, relatively inexpensive and are very easy to replace.

If you drive this car (even in the highest clearance setting) you WILL scuff up the under splitter aero, no matter how much you baby her or how hard you try not to. If you are pushing the envelope, count on constant wear and tear there. Fortunately, GM did a good job of making these parts semi disposable.

Disclaimer, my Camaro has never sniffed a speedbump and my driveway is a low clearance wet dream. My under hood (extractor) water deflector is only installed in the driveway for bath time. Gotta keep that LT4 and her components cool.

[rlarsen462]

Originally Posted by waterman

I hope that this does not sound pretentious, that is not my intention.

I would encourage all that own this machine to put your car on stands and spend some quality time on your creeper exploring the magnificent underbelly of this car. It is likely to give you a bigger chubby than the shiny side. An appreciable amount of time spent there may reveal the answers to all of your questions and concerns about aero on the underside of the ZLE.

With that said; 84669205 is new for 2019 and looks amazingly functional and beneficial. Those of us that have spent time on the creeper get it. I'm looking forward to your impressions ICTsccaCamaro. Thanks in advance.

IMHO, the center air dam (center, under the splitter) rubs WAY before the outside dams do. The outboard dams do not in any way protect the outboard curved deflectors. Keep the curved deflectors and center air dam on the parts shelf boys, they get scuffed and occasionally hit hard, even when driving conservatively. Fortunately the plastic aero sections under your splitter are readily available, relatively inexpensive and are very easy to replace.

If you drive this car (even in the highest clearance setting) you WILL scuff up the under splitter aero, no matter how much you baby her or how hard you try not to. If you are pushing the envelope, count on constant wear and tear there. Fortunately, GM did a good job of making these parts semi disposable.

Disclaimer, my Camaro has never sniffed a speedbump and my driveway is a low clearance wet dream. My under hood (extractor) water deflector is only installed in the driveway for bath time. Gotta keep that LT4 and her components cool.

How dare you suggest we take the time to understand our cars! And I agree, it's a marvel under there.

All that said though, what is your take on those outer deflector tire dams? On or off?

Would you recommend leaving 84669205 on all the time, or do you see a significant concern for water ingress if caught in some water or driving through an inadvertent puddle from sprinkler systems, etc.?

[waterman]

Originally Posted by rlarsen462

How dare you suggest we take the time to understand our cars! And I agree, it's a marvel under there.

All that said though, what is your take on those outer deflector tire dams? On or off?

Would you recommend leaving 84669205 on all the time, or do you see a significant concern for water ingress if caught in some water or driving through an inadvertent puddle from sprinkler systems, etc.?

It would depend on application. As a DD, likely not because as you mention water intrusion from rain and puddles. For warm days and track, heck yea! The cooling potential from 8466205 is definitely intriguing. I'm interested in feedback from those who run it.

My outboard dams are on. They have protected my splitter from minor scraping. I'm certain that there is some high speed function/influence, or the engineers would not have designed/installed them.

In my case, the outboard dams don't protect the curved deflectors, mine have been nicked a couple of times. Center dam under the splitter has scraped a couple of times as well. Fortunately, my splitter is still clean. I am at 3/4 front ride height most of the time.

[ICTsccaCamaro]

Well the 2019 steering rack ducts went on perfect.

[rlarsen462]

Looking at that I'm not sure what the concern is with water ingress...even with those large shields, in heavy enough rain, turning, driving through light standing water/puddles, etc. everything up there is getting wet anyway?

I don't see a compelling reason you couldn't run those P/S coolers full time if the car is mainly a track and dry/warm weather non-DD?

Also, thanks for the great pictures!