Crankcase Ventalation For Indv Filters

[shawn kloker]

Ok here is how I designed it.

The tank is inclined so the front of the tank is up in the front.
The 2 barbs in the front of the tank are mounted high on the top to only suck fumes and vent. The fumes and mist are than pulled into the carbs which is than into the head out the exhaust just like the PCV valve on your car engine.
In the middle of the tank I mounted a fitting that the crankcase hose will connect to this also has a fitting on it to extend it up half way inside the tank so no oil will block it.
In the rear of the tank is a fitting flush inside the tank which any oil that goes into the tank will run down the steel braided hose back into the oil filler.

Hopefully this all will work.

Did I design this right?

Perfect! Very nicely done too.

 

[shawn kloker]

I'm just curious?

Won't the suction from the carbs, pull oil into the carbs?

Cowboy,The suction on a 1/4 inch line will be very minimal.Air is also being sucked into the air cleaner the whole way around the filter too.

 

[lankeeyankee]

filters in a short time will get a film of oil restricting air flow also believe it will lose velocity into the carb...run those clear tubes to the ground..probably wont get one drop out of those tubes all year

Trying to understand your logic.

How will oil get on the inside of the filters with the carbs sucking the air into the intake? Carbs suck air not blow air. With the lines coming inside the carbs how will oil get on the filters?
Please explain this to me, maybe you know something is it possible?

 

[113s&s]

Trying to understand your logic.

How will oil get on the inside of the filters with the carbs sucking the air into the intake? Carbs suck air not blow air. With the lines coming inside the carbs how will oil get on the filters?
Please explain this to me, maybe you know something is it possible?

residue will wick down and out once inside top of filter.......good thing is we can find out....not a problem just another reason to play with the filters

 

[hubeerjw]

O.k. I'm now working to figuring out what I want to do with my breather setup. I looked in the air box, and I don't like the stock system. As Lankee stated earlier (in a very sarcastic tone :whistlin much of this is done for emission purposes only. I don't like the fact that the system is dumping the crankcase fumes into the carbs. The air is filled with an oil mist, and we all know what can be in oil.... This is not fresh air, it is contaminated and can gum/plug up the carbs and basically add to the dirtyness of the carbs. I really think that the Stage 7 and Morley's kit do add extra air, increasing crankcase pressures and basically dumping more contaminates into the carbs. I think I am going to try to get an O2 bung and weld it into the collection chamber of my Kerker... that way I can always put in an O2 sensor if I ever get a gauge. My biggest concern is that the exhaust gas temps will not be hot enough to bun off the oils, but there should be enough flow that it won't really matter... it will just be blown out the exhaust and into the air. My only other concern will be making sure the exhaust pressure does not build to the crankcase pressure. In theory, if I do it correctly, it should do the exact opposite. Exhaust gas passing past the bung/hole should create a vacuum/siphon and suck the crankcase gasses out. If anyone has any comments, questions, concerns.... please let me know...
I'll take any feedback.
Thanks,

Jeff

 

[QuarterHorse]

Looks like mine, and really nice!

 

[hubeerjw]

Quarterhorse... you have yours venting into your exhaust? If so, can you post a few pictures?

Thanks,
Jeff

 

[lankeeyankee]

O.k. I'm now working to figuring out what I want to do with my breather setup. I looked in the air box, and I don't like the stock system. As Lankee stated earlier (in a very sarcastic tone :whistlin much of this is done for emission purposes only. I don't like the fact that the system is dumping the crankcase fumes into the carbs. The air is filled with an oil mist, and we all know what can be in oil.... This is not fresh air, it is contaminated and can gum/plug up the carbs and basically add to the dirtyness of the carbs. I really think that the Stage 7 and Morley's kit do add extra air, increasing crankcase pressures and basically dumping more contaminates into the carbs. I think I am going to try to get an O2 bung and weld it into the collection chamber of my Kerker... that way I can always put in an O2 sensor if I ever get a gauge. My biggest concern is that the exhaust gas temps will not be hot enough to bun off the oils, but there should be enough flow that it won't really matter... it will just be blown out the exhaust and into the air. My only other concern will be making sure the exhaust pressure does not build to the crankcase pressure. In theory, if I do it correctly, it should do the exact opposite. Exhaust gas passing past the bung/hole should create a vacuum/siphon and suck the crankcase gasses out. If anyone has any comments, questions, concerns.... please let me know...
I'll take any feedback.
Thanks,

Jeff

Hmm I thought about allowing the oil fumes dump in the exhaust as drag racers do.
You also have to remember your exhaust packing is fiberglass unlike an automobiles.
What kind of effect do you think the oil mist will have on the fiberglass over time?

 

[hubeerjw]

I thought about that as well, but the fiberglass does burn/breakdown, and you need to replace it from time to time anyway. I'm not sure if the fiberglass would absorb the oils or if it would burn off. I am going to try it, so stay tuned.... I hate to drill and weld on the Kerker, and am not sure what to do to keep things from rusting after the install, but maybe I can get some silver paint and just brush it on.

Jeff

 

[lankeeyankee]

I would love to have an 02 sensor bung welded into my exhaust also BUT I fear it may add to another leak I am not using fiberglass packing anymore it burns out to quickly I purchased some omophorphise silcone I cant spell for shit tonight to many beers but A MORE FIS SILICONE is how its pronounced I purchased it from Mcmastercar 2 years ago and it DOESNT burn out like fiberglass and its cheap and does the same thing as fiberglass but burn out
I dont think I am having problems with performance with my crankcase ventalation system I dont know who knocked the setup about oil mist being sucked into the carbs but think about it if it was an issue do you really think Chevorlet would have put there crankcase vent in the airfilter system on the V8 engines for over 20 yrs
Where do you think your factory tube is going to THE AIRBOX if its such a worry about sucking fine oil mist fumes through the carbs put a filter in the lines such as foam to boot if it was a problem dynojet wouldnt have engineered it that way
No performance issues here with my setup hitting 100+ in the eight mile

 

[lankeeyankee]

"This is not fresh air, it is contaminated and can gum/plug up the carbs"

Oil gumming up the carbs:rofl_200: yeah I guess for those that use RTV silicone on there gaskets :yelrotflmao:
Isnt oil and gas both the same product When they say gas prices are up its due to the price of a barrel of hmmm OIL:ummm:

 

[Rusty McNeil]

I would love to have an 02 sensor bung welded into my exhaust also BUT I fear it may add to another leak I am not using fiberglass packing anymore it burns out to quickly I purchased some omophorphise silcone I cant spell for shit tonight to many beers but A MORE FIS SILICONE is how its pronounced I purchased it from Mcmastercar 2 years ago and it DOESNT burn out like fiberglass and its cheap and does the same thing as fiberglass but burn out
I dont think I am having problems with performance with my crankcase ventalation system I dont know who knocked the setup about oil mist being sucked into the carbs but think about it if it was an issue do you really think Chevorlet would have put there crankcase vent in the airfilter system on the V8 engines for over 20 yrs
Where do you think your factory tube is going to THE AIRBOX if its such a worry about sucking fine oil mist fumes through the carbs put a filter in the lines such as foam to boot if it was a problem dynojet wouldnt have engineered it that way
No performance issues here with my setup hitting 100+ in the eight mile

I had one welded into the mid pipe on my stainless UFO and haven't had any problems, the guy TIG'ed iti think.

If your is mild steel, ceramic coated maybe you could just use rattle can ceramic exhaust paint?

As for exhaust evacuation of the crankcase; I had to go that route on a SBC I built becuase of extreme pressure buildup, no less aggresive method would work well enough to keep from blowing out the rear intake manifold gasket.

If you use this method be prepared to keep a VERY close eye on your oil level because evacuation this agrresive will cause oil consumption to go way up.

Rusty

Rusty