i run the aerospace tank with a star vac pump pulling 15" of vac with no oil mist. sounds like you may have to much blowby.

 

Is that a wet sump? Most times i get over 11 or 12 inches on a wet sump the oil pressure gets wiggy

 

Everyone I know using the "short" Moroso tank has the same issue. Just got to change your wristbands more frequently.

If you have the room, switch to the long tank and problem solved.

 

Make sure you use the 100% cotton kind.

 

or the blue ones, heard they work the best..

 

its not blowby, i put on on this engine 6 years ago and it was built not intended for a vacuum pump, had it dont over 2.5 years ago this time with low tension rings for a vacuum pump and its still the same shit.

its the short moroso, a few buddies also have the same issue. thanks for the replies fellas

 

I suggest you find out why the pump is pulling so much oil and fix the problem as opposed to just using a larger band aid.
Star Hg

 

use an oil air seperator - works great - some combos are just prone to sucking oil in.

 

.

I get the cheap terry clothes rags and change them every pass.
I use them as another tuning aid.
When they get more oil then usual, I know something is up and do a leak down.

.

 

i dont think its a pump or engine problem honestly many people i know have the same issue on their street cars and live with wiping the inner fender down every few weeks. I have the short 6" moroso and ive never filled it completely, since the filters saturated already itll fill up only 1-2" inches and itll start to mist residue on my inner fender where its mounted.

to get to that point ill average 10-15 passes and 75-125 miles on the street. Id say 1/2 those street miles are spent on the highway cruising.

 

I ended up making my own, because most on the market are shit.

A seperator or breater, should be able to be opened for maintenance. It should have coarse stainless or some type of vapor removing media. It should also have baffles and vent tubes arranged properly.

If your filter is getting soaked with oil,mits because the filter is taking the place of the stainless wool that should be INSIDE the breather/seperator.

 

this is the one i will be going with

http://www.jegs.com/i/Moroso/710/85467/10002/-1 this has baffles in it to stop oil from misting out

Moroso 85467 - Moroso Oil Breather Tank Details



Remote breather with superior air/oil separation performance
A perfect companion for engines equipped with dry sump pumps, vacuum pumps or non-dry sump or non-vacuum pump equipped engines that historically have "pushed oil" with other breather tanks
-12 AN male side fitting and an -8 AN drain plug Features internal baffling with mesh media for superior separation of air and oil
Black powder coated finish
Includes a panel mount, billet aluminum clamp that has two supplied 1/4" -20 mounting hardware

 

I run the Moroso tank. The first 3 yrs I never had more than a shot glass of oil in it after 25 passes and it seldom ever showed any oil smoke and no residue on the firewall. I increased the oil to the top of my engine to help with valve spring life during the last freshen up. Now I get oil smoke and have to use the wrist bands so that tells me the problem is oil mist flying around inside the covers being pulled into the pump. I also built a separate tank and used a close nipple to attach it to the bottom of the Moroso. I thought the oil would drain into the lower tank so it would be less likely to want to blow out the vent. This did nothing for mine. Find an area where there is no oil flying around and I think the problem will be fixed in a well sealed motor. I'm wondering about the lifter valley under the intake?

 

What about coming off the fuel pump boss?

 

thanks stealth and realmckoy

and as far as oil mist goes mayb its the position on the valvecover. and i was told the same thing anything more then 12-14"s u run the risk of running wrist pins dry.


remember too in the short moroso 1-2" of oil is only about a shot glass worth. il try the taller one first and take it from there.

 

I use the allstar tanks. They are a nice pice for the price and have a baffle to keep the oil down.

 

The Moroso also has a baffle but that doesn't seem to be all that effective. If I could find some old very coarse shredded mess I would like to put it inside the tank and see if that did anything.

 

Stainless pot scrubbers

 

Would steel wool be acceptable, also?

 

We plumb as sealed breather tank between the pump and valve cover. The sealed tank catches the oil before it goes through the pump and to the vented/breathered tank, works great.

Martin

 

 

OK. The photo in post #22 has been up for over six hours and no one has commented about the very obvious problem with this set-up. "Whats wrong with this picture?"
Star Hg

 

If you're going to say that the engine won't pull vacuum with the breather in the valve cover you would be correct, if it was a breather. It's not, it's a breather over a mclntick relief valve.

Was that your observation?

 

If you're going to say that the engine won't pull vacuum with the breather in the valve cover you would be correct, if it was a breather. It's not, it's a breather over a mclntick relief valve.

Was that your observation?

 

Sorry for the double post.

 

Exactly. But only you would know this and no one else picked up on it. Having a filter over the regulator is a good idea. Having the regulator in the valve cover is not. When the regulator reaches its set point it opens and lets air into the engine to keep the vacuum from increasing. However, it has now created a path of air through the crankcase and promotes the vac pump to syphon windage from the engine and ultimately blows this oil into the puke tank. This condition contributes to the very problem described throughout this topic. I see guys spend hours trying to find and fix gaskets and seals that leak then put a regulator in the valve cover and purposely create a leak! Take the regulator out of the valve cover and place it directly on the vac pump. Now the air bypassed by the regulator will not be introduced into the engine. The vac pump will pull less oil and your pump will be happier because it will now have ambient air flowing through it instead of preheated crankcase air. Just a suggestion.
Star Hg

 

Exactly. But only you would know this and no one else picked up on it. Having a filter over the regulator is a good idea. Having the regulator in the valve cover is not. When the regulator reaches its set point it opens and lets air into the engine to keep the vacuum from increasing. However, it has now created a path of air through the crankcase and promotes the vac pump to syphon windage from the engine and ultimately blows this oil into the puke tank. This condition contributes to the very problem described throughout this topic. I see guys spend hours trying to find and fix gaskets and seals that leak then put a regulator in the valve cover and purposely create a leak! Take the regulator out of the valve cover and place it directly on the vac pump. Now the air bypassed by the regulator will not be introduced into the engine. The vac pump will pull less oil and your pump will be happier because it will now have ambient air flowing through it instead of preheated crankcase air. Just a suggestion.
Star Hg

That makes some sense. I'll move my regulator when I get a chance and see if that helps.