Carbon Buildup on rear of car

C Man · 09-28-2019, 12:16 PM

It's getting a little frustrating. My car is white. I wash it and the car is perfectly clean. However, over a period of a day or 2, black dots/powder...probably from the exhaust build up on the rear of the car.

No mods to the car aside from the removal of the fuse to keep the exhaust flap open all the time.

Would this be causing it? I can't believe how much is being built up. Even my exhaust tips get dark quick. I thought new cars had to have better emissions systems.

Thoughts? Should I put the fuse back?

Revalot · 09-28-2019, 12:50 PM

Try the fuse ! I have a white ZL1 and it stays in track mode with a Atak full exhaust and my car never gets carbon buildup. What grade of gas are you running ? I run 93 octane.

Juiced1 · 09-28-2019, 01:02 PM

White cars are hard to keep clean. Anything you can do to clean up the exhaust helps. Do you have a catch can? They are good to have on these cars for many reasons. I'd also recommend getting it ceramic coated. You can just wipe it down when you're done driving it.

C Man · 09-28-2019, 01:10 PM

Quote:

Originally Posted by Revalot

Try the fuse ! I have a white ZL1 and it stays in track mode with a Atak full exhaust and my car never gets carbon buildup. What grade of gas are you running ? I run 93 octane.

I'll try putting the fuse back. I either use 91 or 94 octane depending on what is available where I'm filling up.

I just don't understand how a newer model car can spit out so much carbon build up with regular not spirited driving.

SJFGTO · 09-28-2019, 02:00 PM

These cars run almost pig rich, not just when the driving turns spirited. Octane level is not going to make a difference, neither will a catch can. Rich tune + white car = noticeable exhaust residue.

viurniel · 09-28-2019, 02:06 PM

I wash every 3-4 days for this reason.

Delaney · 09-28-2019, 02:24 PM

I have noticeable buildup after 2 days of driving. Granted it's L.A. streets. No mods to exhaust. White car! Going to go ceramic route.

LT4Greg · 09-28-2019, 03:54 PM

My ZL1 is silver and less noticeable than a white ZL1 but my outside exhaust tips are black due to the fuse pull I did. Of course I washed it about a week ago and the tips are still clean. I went to Summit racing in McDonough and bought a drop in Summit racing air filter and seems like it may not be running so rich now.

Timbo-1LE · 09-28-2019, 04:35 PM

Result of D.I. And you should have seen the turbo Solstice GDP in 2007 when gm first came out with it.

arpad_m · 09-28-2019, 06:28 PM

Quote:

Originally Posted by viurniel

I wash every 3-4 days for this reason.

I honestly wonder how (or if) people manage to do this and not put swirls and scratches into the paint. Are you ceramic coated and do you do a touchless wash every 3-4 days, or a regular two bucket wash, or...?

Joshinator99 · 09-28-2019, 06:30 PM

Convert to E85. Problem solved.

Can'tHave2MuchHP · 09-28-2019, 10:20 PM

I have to wash it after nearly every drive or my OCD flares up...

collinms · 09-28-2019, 10:53 PM

Normal. Had it on my ctsv and c6 as well.

Revalot · 09-29-2019, 09:42 AM

The main reason I believe the back of the GM sportcars build up black carbon is the tip design. being bell shape at the tip is a bad idea(Exhaust flows over on bumper/ license plate). My chevelle had a big block 468 that ran pig rich, but my tips are straight out, with my Atak tips there straight out also. These flare/bell tips are a poor design.

09-28-2019, 12:16 PM	#1
C Man Drives: 2018 White Convertible Camaro ZL1 Join Date: Jul 2013 Location: Toronto Posts: 74	Carbon Buildup on rear of car It's getting a little frustrating. My car is white. I wash it and the car is perfectly clean. However, over a period of a day or 2, black dots/powder...probably from the exhaust build up on the rear of the car. No mods to the car aside from the removal of the fuse to keep the exhaust flap open all the time. Would this be causing it? I can't believe how much is being built up. Even my exhaust tips get dark quick. I thought new cars had to have better emissions systems. Thoughts? Should I put the fuse back? __________________ White 2018 Camaro A10 Convertible ZL1

09-28-2019, 02:00 PM	#5
SJFGTO Oh Oh it's Friday Night! Drives: 2018 ZL1 1LE Nightfall Gray Join Date: Jan 2018 Location: Walton Woods Posts: 1,061	These cars run almost pig rich, not just when the driving turns spirited. Octane level is not going to make a difference, neither will a catch can. Rich tune + white car = noticeable exhaust residue. __________________ 2018 Camaro ZL1 1LE NFG; ARH 2” headers, catless mids, ARH full exhaust, Lingenfelter 18% lower pulley, ATI Harmonic Balancer, Roto-fab CAI, EE-catch can, TM ported TB, NX Lid, BMR strut tower brace. Aeroforce dual pod interceptor gauges. Tuned by Vengeance Racing!!! 644 HP @ 6250 rpm / 689 trq @ 3660 rpm Four that wanna own me Two that wanna stone me One says she's a friend of mine...

09-28-2019, 02:24 PM	#7
Delaney Drives: '17 Summit White ZL1 Join Date: Jul 2017 Location: Pacific Palisades, CA Posts: 81	I have noticeable buildup after 2 days of driving. Granted it's L.A. streets. No mods to exhaust. White car! Going to go ceramic route. __________________ Gregory -2017 Camaro ZL1

09-28-2019, 03:54 PM	#8
LT4Greg Drives: 2017 Camaro ZL1 Coupe Join Date: May 2016 Location: Georgia Posts: 5,813	My ZL1 is silver and less noticeable than a white ZL1 but my outside exhaust tips are black due to the fuse pull I did. Of course I washed it about a week ago and the tips are still clean. I went to Summit racing in McDonough and bought a drop in Summit racing air filter and seems like it may not be running so rich now. __________________ ZL1 Coupe, PDR, Exposed carbon fiber hood insert, My Link with Nav, M6 6 speed and Silver Ice Metallic. Mods done: ceramic window tint, GM Accessories Camaro floor mats and Roto-Fab CAI.

09-28-2019, 06:30 PM	#11
Joshinator99 Drives: 2017 Camaro 2SS A8 Join Date: Aug 2018 Location: Petersham MA Posts: 4,760	Convert to E85. Problem solved. __________________ 2017 Chevy Camaro 2SS A8 Whipple 3.0, Mast Black Label heads, Fore triple in-tank pumps, 112mm TB, LPE +52% injectors, LPE BB HPFP, 15” conversion *1059 WHP/944 WTQ, 9.48@150*

09-28-2019, 12:50 PM	#2
Revalot Drives: ZL1/1LE parts added Join Date: May 2018 Location: Somewhere around Texas pines tress and smooth asphalt Posts: 609	Try the fuse ! I have a white ZL1 and it stays in track mode with a Atak full exhaust and my car never gets carbon buildup. What grade of gas are you running ? I run 93 octane.

09-28-2019, 01:02 PM	#3
Juiced1 Account Suspended Drives: 2012 2SS CAMARO 45th Join Date: Apr 2011 Location: St. Charles, IL Posts: 18,663	White cars are hard to keep clean. Anything you can do to clean up the exhaust helps. Do you have a catch can? They are good to have on these cars for many reasons. I'd also recommend getting it ceramic coated. You can just wipe it down when you're done driving it.

09-28-2019, 02:06 PM	#6
viurniel @viurniel Drives: 19 ZLE A10, 15 2SS, 90 300ZXTT Join Date: May 2016 Location: Miami Posts: 409	I wash every 3-4 days for this reason.

09-28-2019, 04:35 PM	#9
Timbo-1LE Drives: 2017 SS 1LE Join Date: Mar 2017 Location: Florida Posts: 617	Result of D.I. And you should have seen the turbo Solstice GDP in 2007 when gm first came out with it.

09-28-2019, 10:20 PM	#12
Can'tHave2MuchHP Drives: Fast Join Date: Mar 2015 Location: Michigan Posts: 3,696	I have to wash it after nearly every drive or my OCD flares up...

09-28-2019, 10:53 PM	#13
collinms Drives: 2017 ZL1 A10 Summit White Join Date: Apr 2018 Location: Cumming, Georgia Posts: 511	Normal. Had it on my ctsv and c6 as well.

09-29-2019, 09:42 AM	#14
Revalot Drives: ZL1/1LE parts added Join Date: May 2018 Location: Somewhere around Texas pines tress and smooth asphalt Posts: 609	The main reason I believe the back of the GM sportcars build up black carbon is the tip design. being bell shape at the tip is a bad idea(Exhaust flows over on bumper/ license plate). My chevelle had a big block 468 that ran pig rich, but my tips are straight out, with my Atak tips there straight out also. These flare/bell tips are a poor design.

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