1990 Vert 5.3L Turbo/ 200R4 Trans/ 8.8 Ladder Bars, w/Start Up Vid.

[zbrown]

he realizes that.....


he had a frowny face because he has sufficient line size yet problems....

[spacevomit]

Of course..    Obviously I just learned about how that works...  .. I'll just wait quietly..for the pic.

[WannaBeFast]

I haven't been able to take a new pic but here is an old one that shows the drain line. Tell me what you think.

[Sho Amo]

Was this turbo new?

I am also curious why you are using 4 fittings instead of 2.

[WannaBeFast]

Yes turbo is brand new.

The reason I am using more fittings is because the -12 AN would not fit between the turbo but the -10 would.

[digitalsolo]

Do you have sufficient crankcase ventilation?

[zbrown]

looks like he is just vented to the atmosphere with



personally if it was me i would unhook the drain the from the pan, stick it in a bucket and start the car and see if it has issues like that


also this is just a stock 5.3 right? no crazy oil pressure mods or something right?

[WannaBeFast]

Yea man - all stock 5.3L - nothing crazy.

I have been doing some research and I have discovered a few things, as much as I can understand.

There are a lot of people on various forums using smog pumps for crankcase pressure to somewhat of a success. And by looking at some aftermarket vacuum pumps - to me they look like glorified smog pumps - same design/ look - at least from the outside.

Some other folks are using electrical pumps - specifically a gm type found in many cars like corvette, camaro, GMC, etc. Hell one company is buying them from GM - removing the stickers, adding a plastic tank and selling them as their own product. When I saw it in the catalog today I couldn't believe my eyes.

 However, they are not continuous duty so they are no good to me. I guess they work ok for a few minutes at the drag strip. They work better to suck moisture and stuff for people running alcohol. Sarcastically the moisture kills them much faster.

Anyways, I went to the junkyard today and got an actual vacuum pump from an older model 7.3L Powerstroke engine. I have not been able to get official info but from the forums online they can pull 21-25 in Hg which in my opinion is pretty good. I think 7 - 13 in Hg is necessary for our engines - correct me if I am wrong.



Now it's a matter of finding/ making some pulleys with the correct ratios and trying it out.

I also ordered a Moroso vacuum relief to install in one of my valve covers since I already have a -12 An bung welded on there.

If you guys have any info/ opinions it would be great help.


Another thing - the vacuum pumps online are measured in CFM - I guess thats how much air are displacing but i do not know how to relate it to the "In Hg."

[mefarri]

Before you go solving a problem, it's good to try and figure out what's causing it.   

Do what Zac said and see what happens. 

[WannaBeFast]

Well - we hooked up a shop vac in one of the breather lines - plugged the other one and the smoke stopped immediately.

[slinky]

this is dope! also curious on the carb used, considering doing this blow through style on my fb

[spacevomit]

Interesting. Anyway, vacuum measured inHg (inches of mercury), can be converted to, say, psi (1 inHg is about .5 psi), but CFM measures rate of flow, as opposed to vacuum. But I think you should take another picture of the drain, so you can see the whole line, you could hang a plumb bob or weight on a string in the pic, so that you can have a reference for the angle of the drain. Have you seen an oil drain sump tank before? Seems like a less than ideal drain angle can easily cause this.

[zbrown]

You shouldn't need anything at all, there is something goofy, whether it is a faulty new turbo or a return issue

I wouldn't go through the work to run that particular pump, they are low volume,  it is used just for brakes, hvac, cruise, ect

My 2 cents

[zbrown]

Dont get me wrong, it may move enough to keep up with the blowby of a tight stock motor,   it wouldnt keep up with motor that is a little loose though

[spacevomit]

Maybe this is an aggravating factor: apparently, when the vehicle is moving, at least above a certain speed, a proper open vent setup does benefit from vaccuum. This is what they did before emissions controls, a "road draft tube".