05-28-2022, 08:23 AM | #1 |
Drives: 2018 Camaro ZL1 Join Date: Mar 2022
Location: CT
Posts: 9
|
Header Coating
I'm looking for recommendations for a flat black header coating that is resistant to heat discoloration. I have 1-7/8" ARH longtubes that I had coated with Aluminum Ceramic inside and out. After only a couple drives since having the car dyno tuned some of the primary tubes have discolored bluish-green spots with small white barnacle looking clusters. The coating shop said the clusters are from the aluminum melting out of the coating, which occurs at temperatures exceeding 1400F. Have others experienced the same with ceramic coatings?
-Dave |
05-28-2022, 08:38 AM | #2 |
Drives: 2020 Camaro ZL1 1 LE Join Date: Mar 2021
Location: MD
Posts: 93
|
I can’t help you with finding a better coating, but if you truly are hitting 1400+ deg F with your exhaust gas temps for long enough periods to melt the coatings out, then I’d start to be a little concerned. When we tune my road race car, we put a probe in each exhaust outlet about 2-3” from the head. We aim for about 1150ish plus or minus a little bit for extended WOT. (this is on a NA motor not FI). I know for FI the EGTs are allowed to get a little higher, but I’d be worried that 1400 is beginning to eat into the extended longevity of your engine. High EGTs can be caused by a too lean condition at high load, or excessive ignition retard (attempting to control detonation).
Just wanted to mention this so that you can look into it and head off a possible engine failure before it comes to happen! |
05-28-2022, 11:03 AM | #3 | |
Drives: 2018 Camaro ZL1 Join Date: Mar 2022
Location: CT
Posts: 9
|
Thanks for the info! The car is currently a garage queen so has literally only been driven two times around town, and minimal WOT onto the highway, which is why I'm concerned with a coating failure already.
Quote:
|
|
05-28-2022, 11:17 AM | #4 |
Drives: 2017 Camaro 2SS A8 Join Date: May 2019
Location: USA
Posts: 1,656
|
My headers were coated with Cerakote brand ceramic. One thing I’d mention that is important is using the proper coating for the application. If the business that did your coating used the wrong type of ceramic, I’d expect it to underperform.
Take some time and watch this video from Hagerty. It’s informative and I suggest paying specific attention to the “series” of product they mention. Personally I’d get in touch with your shop and ask what series of product they used for your application. They may have selected the wrong coating. https://m.youtube.com/watch?v=oa3wddbKTUw
__________________
Roto-Fab w/sound tube delete, Katech ported TB, Pray IM, Velossa, DD side markers, DSX FF, UPR Catch can, Halo brace, My custom vent gauge pod
Originally Posted by arpad_m - “Aww, yet another oil thread with almost the same question in the OP“ |
05-28-2022, 11:24 AM | #5 |
Drives: 2018 ZL1 Coupe NFG M6 Join Date: May 2017
Location: Nolensville, TN
Posts: 618
|
Black header coating is unlikely to stay black long term FYI. You could get the coating from NASA, it won't matter...just trying to manage expectations.
__________________
1989 Forumla 350 WS6 <- High School
2000 Trans Am Firehawk <- After High School 2017 Colorado Z71 <- Daily 2018 ZL1 M6 <- Not Daily |
05-28-2022, 12:01 PM | #6 |
Drives: 2021 Red Hot ZL1 Join Date: Sep 2020
Location: Gapplebees
Posts: 3,084
|
Jet-Hot Ultra Extreme 2500 coating. I've had this coating on my headers for almost 2 years now and they still look exactly the same as the day they were installed and they dramatically reduce underhood temps.
|
05-28-2022, 01:37 PM | #7 |
Drives: 2017 Camaro 2SS A8 Join Date: May 2019
Location: USA
Posts: 1,656
|
I agree with Z OH 6. The coating on my headers is about a year old and they look the same as the day I put them on.
__________________
Roto-Fab w/sound tube delete, Katech ported TB, Pray IM, Velossa, DD side markers, DSX FF, UPR Catch can, Halo brace, My custom vent gauge pod
Originally Posted by arpad_m - “Aww, yet another oil thread with almost the same question in the OP“ |
06-02-2022, 08:17 AM | #8 |
Drives: 2023 ZL1 M6 Join Date: Sep 2018
Location: Pace FL
Posts: 417
|
Another vote for JetHot 2500 coating. Satin black and still looks great 3 years later.
__________________
2024 Riverside Blue ZL1 M6
Magnuson 2650R, NW 103, Roto Fab Big Gulp, Jet Hot Coated ARH 2 inch LT's, Stainless Works NPP, Too High PSI Billet Valve Covers, Mighty Mouse Wild CC Signature Forged 20x10.5/20x11.5, 295/30-315/30, BMR springs, BMR Cradle lockout, AAD Billet Control/Trailing arms 2023 Vivid Orange ZL1 M6 - sold 2019 Riverside Blue ZL1 A10 - sold |
06-02-2022, 08:44 AM | #9 |
Drives: 2018 Audi TT RS Join Date: Jan 2014
Location: Navarre, Florida
Posts: 1,915
|
I went with cerakote on my C7 Z06. Ultimately, I think any coating is better than bare headers. But JetHot has been around forever doing this and I'm confident that you'll be happy with their product.
__________________
2018 Audi TT ▊RS
2.4X 0-60, 1.6X 60', 120+mph 1/8th, 4.XX 60-130, 150+mph traps on 255/35/18 R888R tires on the street (unprepped). 2019 Audi RS3 About as fast as the TT RS 2019 Camaro ZL1 1LE Sold 2018 Camaro SS 1LE Sold 2019 Corvette Z06 Sold 2021 Charger Hellcat Redeye Widebody Sold |
06-02-2022, 08:55 AM | #10 |
Drives: ZL1 Join Date: Oct 2021
Location: Houston
Posts: 139
|
always wondered, how do you think cerkote compares to the jethot 2500
|
06-02-2022, 10:20 AM | #11 |
Drives: 2017 ZL1 Join Date: Jan 2017
Location: NJ
Posts: 905
|
Swaintech is would I would recommend. I got mine headers coated 4-5 years ago and not much has changed on them. It hasn't fallen off, worn off, discolored. There was a drastic temp reduction in the engine bay.
They are in NY so not too far away for you: https://swaintech.com/race-coatings/...aust-coatings/ I haven't come across anything that holds up this well or works so well.
__________________
2017 Camaro ZL1 Coupe M6 (847whp Dynojet on 93)
|
06-02-2022, 10:25 AM | #12 |
Drives: 14 Camaro SS 1LE Join Date: Feb 2019
Location: Clinton Twp, MI
Posts: 483
|
2nd for Jet Hot 2500deg coating, it seems to be the only thing other than the swaintech white lightning that will hold up to continuous heat cycles
https://www.jet-hot.com/thermal-barrier https://swaintech.com/ |
06-02-2022, 10:31 AM | #13 |
Drives: 2016 1SS NFG A8 Join Date: Aug 2017
Location: 46804
Posts: 6,797
|
I would be curious to see a data log. If the car is idling and tip/in part throttle is negative timing values that will make the headers get extremely hot to the point it's ruins the header coating.
__________________
2016 NFG 1SS A8
Options-2SS Leather/NPP Perf. mods-Whipple 2.9/Fuel System/Flex Fuel/103mm TB/Rotofab Big Gulp/Cat Deletes/Corsa NPP Per. times- 10.5 @ 137 w/ 1.8 60ft Full weight on 20's 1200DA |
06-02-2022, 01:32 PM | #14 |
Drives: 19 ZLE A10,17 SS 1LE, 16 C7R,CT5V Join Date: Feb 2017
Location: Berryville, VA
Posts: 175
|
Skip coating, go headershield
|
|
|
Post Reply
|
|
|