Idle rpm changed with air/oil sep installation...

[patrickt]

Originally Posted by Bobcat

Just curious whose air/oil separator you were using . The one that comes to mind that has a mesh in it is the Moroso unit . I would also be curious what baffle system you come up with .

If that was aimed at me, I do have the smaller of the Moroso separators, along with the ME Wagner adjustable PCV, and Blue Thunder valve covers baffled as shown below. I have no problems whatsoever with them, and they work beautifully, provided that I empty the separator every 500 to 700 miles. Any more than that and the separator fills up about half way (that's two ounces) and then I start getting oil sucked in to the engine. You can tell when that happens because there is a slight decrease in off-idle performance and hot idling along with an increase in exhaust smell.

[Sledge]

I needed a small one so I got a Jegs 52206 separator. Other than the ultra-fine sintered filter (very restrictive) it works fine and is well-made. I also use the M/E Wagner PCV valve. I home-made a baffle with a small piece of aluminum I had hanging around but did not take pictures of it.

[Bobcat]

Thanks for both replies .... I also have the Wagner unit and Moroso separator . I took the Blue Thunder VC off as the baffles weren`t doing the job . I would go through about a half quart of oil in just over 100 miles . It wasn`t in the separator , just seemed to go right through the Moroso unit into the intake .
My BT covers are the plain shot peened competition ones and the baffles are what you have Patrick .
The big difference I see is that you ( Patrick ) have your Wagner unit mounted higher than mine as I just used the grommet they supplied . I suspect that if I did the same , the BTV baffles would be adequate for the rpm I turn ...redline is 6400.
It seems the big difference between the Jegs unit and Moroso is the filter media with the Moroso unit not being as restrictive .
So , thanks for the info .