Valve cover baffles . . .

[Spanky]

I didn't want to hijack Cooter's thread, so I moved this question over here. I've got an issue with my finned covers spitting oil out the breathers. Anybody tried adding baffles, like these from Summit?
https://www.summitracing.com/parts/mor-68790

 

[2old2fast]

I made baffles out of sheet aluminum [think tray] & jb welded them in the covers , that was at least 7-8 years ago & the still are in there doing thier job ...

 

[choppedtop]

Those are about like the ones that came with my covers. Seem to work just fine. I have them in both covers, and also vented filler cap on fill spout.

 

[fletcherson]

I made some also, used sheet alum and put some furnace filter glass in it. I still used baffled vents, like the molar style and installed Pcv. Works ok, but for what I paid for the valve covers, Holley, there should have been something available, imho. They are tall, so I had room even with roller rockers.

 

[PotvinGuy]

Spanky, do you use a PCV valve? Or just a breather on each valve cover? Are the breathers filtered? I used to have spitting oil and oil on the firewall. Then I replaced the filters with a PCV-type fitting on one breather and a fitting on the other breather that hoses to the air cleaner:

Keeps it real clean now.

 

[Spanky]

Thanks, Kerry. Is your rear mounted breather vented to atmosphere or a vacuum source?

 

[PotvinGuy]

Thanks, Kerry. Is your rear mounted breather vented to atmosphere or a vacuum source?

It goes to the intake manifold. Instead of a conventional PCV valve, I use a "calibrated orifice" (as the Brits like to call it); it's just a 1/16 hole in a plate. OEMs have a PCV sized for each motor. The hot rod "universal" PCV valves may or may not work for your motor. My motor has high vacuum all the time, so a universal PCV would never open to vent the crankcase.

 

[Francis Blake]

I am really glad I ran across this thread because I have been having the same problem. I installed a breather on the opposite side from the pcv and now I get some oil spray from that side. Looks like I need to make a baffle. Always some good info on this site.

 

[Gerry]

I have blocked the valve covers off and am going for a valley breather. Running a tube to a catch tank and then atmosphere.

 

[Intrepid]

I am making custom valve covers with no holes in the top. I am going to use one way valves out the back side of each valve cover with a baffle on the inside as to not suck up oil.
Then I am going to run a stainless tube (think flared brake line with fittings) from the back of the valve along the header to the collector and vent using exhaust vacuum.
Like this setup ..

https://www.summitracing.com/int/parts/sum-120108/overview/

 

[PotvinGuy]

I have blocked the valve covers off and am going for a valley breather. Running a tube to a catch tank and then atmosphere.

View attachment 13130

View attachment 13131

Gerry, I see you have retro EFI. How do you get the MAP signal? I have a Hilborn system that I want to modify.

 

[Gerry]

Taps into each throttle body to a log with 2 outlets. One for the sensor and one for the trans.



Kinda looks like a little V8

 

[PotvinGuy]

Taps into each throttle body to a log with 2 outlets. One for the sensor and one for the trans.

View attachment 13189

Kinda looks like a little V8

View attachment 13190

View attachment 13191

Excellent. I'm thinking of the same thing, but putting it all underneath. Trying to keep the vintage look as much as possible.

 

[Gerry]

You can buy ready made logs with 8 in and 1 out from Kinsler etc. Saves a bunch load of time than making one, but I just can't stop myself....

 

[PotvinGuy]

You can buy ready made logs with 8 in and 1 out from Kinsler etc. Saves a bunch load of time than making one, but I just can't stop myself....

Thanks for the great tip. I looked thru Kinsler's online catalog and found the logs and other parts I need. And lots of good tech info too.

 

[Gerry]

I have always found Kinsler very friendly and technically good. Called them many times over the years and they still have the original software Mapping for my engine on file.

 

[PotvinGuy]

Yikes, Kinsler is very proud of their stuff! The vacuum junction block is $92 bare and $195 with barb fittings. How can 9 small barb fittings be worth $103?

 

[Gerry]

WOW, that's a lot of $....

At that rate my EFI is worth more than my House!

 

[fletcherson]

Yikes, Kinsler is very proud of their stuff! The vacuum junction block is $92 bare and $195 with barb fittings. How can 9 small barb fittings be worth $103?

Gold plated? I've seen some old Harley cases with 14k inlay, lol...

 

[fordsbyjay]

On my sbf I made a breather that mounts to the fuel pump mount since I have an electric pump. You can buy the breathers from K&N.
I just used a 3/4" 90* piece of conduit and cut it to my liking, then welded it to an old FP block off plate.