Billet Valve Cover guys - What's your new Catch/Breather setup?

[fubar569]

I'm contemplating making the jump just so I can do spark plugs without wanting to toss a baby in a BBQ pit every time. I f*@%ING hate stock valve covers.

But...with baffled 10/12AN connections...what are y'all doing for your catch/breather setups? Since I'm just a slowboi with typical bolt-on's all I currently have is a typical catch on the dirty side between PS and blower.

It may not be this year...but I'm having dirty thoughts again of taking this car far further than I should.

 

[drag racer]

Sub'd!

Exact same situation as you, except one step ahead - changed the covers last year (best thing I have ever done with regard to the spark plug problem), and have been in "post-upgrade" observation & evaluation mode regarding the PCV system since. I fully expected the PCV system might need some tweaking. I haven't driven the car a ton since, but enough to confirm I do want to try some tweaking.

I sort of have a plan in my head, and that was to maintain the full OEM plumbing arrangement and start off with the "worst case", i.e., open, dirty line with no valve/flow restriction going right to existing inlet on the JLT can, and the outlet to OEM port on blower intake. Initial results seem to show quite an increase in oil volume in the can, for which I am not too surprised, but I also implemented a trick I learned from race car PCV days that helps catch more oil, so I am not sure if that is contributing to the increased volume in the can or not - I already violated the best practice of one factor at a time testing . My next idea is to restrict the dirty side flow a bit to simulate as if the valve was in there. I have the parts to re-do the inlet line, but have not had time to try it yet, but happy to share what I observe along the way.

 

[covidcommander]

Sub'd!

Exact same situation as you, except one step ahead - changed the covers last year (best thing I have ever done with regard to the spark plug problem), and have been in "post-upgrade" observation & evaluation mode regarding the PCV system since. I fully expected the PCV system might need some tweaking. I haven't driven the car a ton since, but enough to confirm I do want to try some tweaking.

I sort of have a plan in my head, and that was to maintain the full OEM plumbing arrangement and start off with the "worst case", i.e., open, dirty line with no valve/flow restriction going right to existing inlet on the JLT can, and the outlet to OEM port on blower intake. Initial results seem to show quite an increase in oil volume in the can, for which I am not too surprised, but I also implemented a trick I learned from race car PCV days that helps catch more oil, so I am not sure if that is contributing to the increased volume in the can or not - I already violated the best practice of one factor at a time testing . My next idea is to restrict the dirty side flow a bit to simulate as if the valve was in there. I have the parts to re-do the inlet line, but have not had time to try it yet, but happy to share what I observe along the way.

Any pics of the setup? Gonna be time for me to change the plugs soon.

 

[drag racer]

Any pics of the setup? Gonna be time for me to change the plugs soon.

I think I shared several posts w/ photos in the "What have you done to your Hellcat..." thread - if you look around the February through April 2025 timeframe was when I did the project.

 

[vortecd]

Not sure why someone doesn't make some that are factory plug and play with baffles. I do like the looks but like you are asking you have to figure out how to make the big AN holes work. You do not want to send two lines to an open breather unless you like the smell of inside your engine every time you drive it

For as much as most of us drive our cars, you really should be going years without changing them. Iridium plugs are good for over 60,000 miles. I changed mine to NGK one step colder and lower gap in 2022 then replaced them last year (slightly tighter gap .025) just because the engine was out

 

[covidcommander]

I think I shared several posts w/ photos in the "What have you done to your Hellcat..." thread - if you look around the February through April 2025 timeframe was when I did the project.

Didn't see it

 

[drag racer]

Didn't see it

First post I did was #5,278 on Page 264, with a few more along the way after...with the wrap-up at #5,567 on page 279.

 

[fubar569]

For as much as most of us drive our cars, you really should be going years without changing them. Iridium plugs are good for over 60,000 miles. I changed mine to NGK one step colder and lower gap in 2022 then replaced them last year (slightly tighter gap .025) just because the engine was out

Brisk ER12S once a season. More depending on abuse. It gets hosed on pretty hard with all the drag & drive stuff now. Actually plan to do the covers in conjunction with a packout case just for plugs & carry a spare set with at all times.

Not sure why someone doesn't make some that are factory plug and play with baffles. I do like the looks but like you are asking you have to figure out how to make the big AN holes work. You do not want to send two lines to an open breather unless you like the smell of inside your engine every time you drive it

Gonna guess by the time most think about the covers that they're well past what a factory closed PCV should/could support so it's a very niche application really...