Catch can plumbing??

[Hart_Rod]

I'm trying to figure out the correct way to plumb a catch can for my LS3 with TVS1900 Magnacharger. Diagrams or pictures would be great! Thanks in advance.

[Marv D]

Are you talking the breather vent for the front gearcase of the blower? or the radiator overflow or some kind of crankcase breather / vent ??? Sorry don't know the system at all, but I'm sure someone here will have some ideas but just need to know what were talking about.

[Hart_Rod]

Originally Posted by Marv D

Are you talking the breather vent for the front gearcase of the blower? or the radiator overflow or some kind of crankcase breather / vent ??? Sorry don't know the system at all, but I'm sure someone here will have some ideas but just need to know what were talking about.

I guess I was kinda vague... I'm talking about an oil catch can that works with the PCV system. I've been told it was a must with LS motors to help keep the throttle body clean.
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[regan wilson]

I would guess you could use a vented catch can like we do with vacuum pumps. Its easy to build one out of an old rad catch can. Just put a filter on top so it can breath.

[vin63]

X2...this is what I normally use for a breather tank on vacuum pump applications...relatively easy to find and around $100 (the poly tanks are around $40).

[Last_Paladin]

Originally Posted by vin63

X2...this is what I normally use for a breather tank on vacuum pump applications...relatively easy to find and around $100 (the poly tanks are around $40).

Yep, with -10AN bungs on the valve covers.

[Hart_Rod]

Originally Posted by regan wilson

I would guess you could use a vented catch can like we do with vacuum pumps. Its easy to build one out of an old rad catch can. Just put a filter on top so it can breath.

Originally Posted by vin63

X2...this is what I normally use for a breather tank on vacuum pump applications...relatively easy to find and around $100 (the poly tanks are around $40).

Originally Posted by Last_Paladin

Yep, with -10AN bungs on the valve covers.

I picked up a breather/catch can. Here is a pictorial of my plan on the plumbing. Thoughts?

[Last_Paladin]

Seems complicated. I just vented my valve covers. Every so often, I empty the can. It's not like I get a lot of oil. Also, I was told not to hook up to my charger, as it will suck all the oil right out.

[Hart_Rod]

Originally Posted by Last_Paladin

Seems complicated. I just vented my valve covers. Every so often, I empty the can. It's not like I get a lot of oil. Also, I was told not to hook up to my charger, as it will suck all the oil right out.

Interesting. Magnacharger told me some oil is good for the supercharger.

[Last_Paladin]

Originally Posted by Hart_Rod

Interesting. Magnacharger told me some oil is good for the supercharger.

It's good for the charger, not so hot to apply vacuum to the oil side of the motor.

[Hart_Rod]

Originally Posted by Last_Paladin

It's good for the charger, not so hot to apply vacuum to the oil side of the motor.

Isn't that what a factory pcv system does?

[regan wilson]

Just use the valve covers

[Hart_Rod]

Originally Posted by regan wilson

Just use the valve covers

Do you mean just put breathers on them? I found this discussion in another thread:

http://www.dsmtalk.com/forums/showth...177223&page=11

[regan wilson]

Disregard my last post. I didnt read the link you posted becuase my computer locked up lol. Since I use a vacumn pump the plumbing is a little different but I think your idea would work. My concerns would be how many inches that setup will pull. I would test it to find out. I run a pop off valve in one valve cover to keep vacumn at 10 inches. You dont want anymore than that.

[familyfast64]

Originally Posted by Hart_Rod

Isn't that what a factory pcv system does?

Yes but oil is sucked up through the pcv and into your intake. Some more than others, but the catch can set up only allows your carb or manifold vacuum to get clean air while collecting the oil picked up in a... Catch can.

[Hart_Rod]

Originally Posted by familyfast64

Yes but oil is sucked up through the pcv and into your intake. Some more than others, but the catch can set up only allows your carb or manifold vacuum to get clean air while collecting the oil picked up in a... Catch can.

I understand the purpose of the catch can, that's why I'm installing one. However, plumbing it the correct way with my configuration, is what I'm needing help with. I realize that I could just vent the valve covers to the catch can with no vacuum source, but I thought that there still needed to be some meetered vacuum via a PCV to the intake. Here's what I have plumbed so far, both valve covers to the middle port on the catch can. I'm thinkin I need to bring the top port to a pcv and then to on of the vaccum ports on the front side of the supercharger. Thoughts?

[familyfast64]

I'm sorry, I hope my response didn't come off as rude. To be honest I was defending you thinking someone else was questioning the idea. I skim through these and get excited when there's one I feel I can answer.lol . If you have both covers going to the can, and then can to vacuum source you should be good. I would put the pcv valve on both (or one with pcv,one with filter) covers tho because the plug in the valve will herp with not sucking up too much oil. Altho they still stuck up oil. Usually cause with performance set ups, having bigger rockers and guirdles, baffles under the covers are removed to make room and gives the oil a more direct shot through the pcv. I'm not real familiar with supercharged late model set ups, so perhaps I'm not the guy to answer. But that was my understanding for the reasoning for them on the gen1. It any block that sucking in oil and having a strong vacuum signal.
You need the vacuum source tho.

[Hart_Rod]

Originally Posted by familyfast64

I'm sorry, I hope my response didn't come off as rude. To be honest I was defending you thinking someone else was questioning the idea. I skim through these and get excited when there's one I feel I can answer.lol . If you have both covers going to the can, and then can to vacuum source you should be good. I would put the pcv valve on both (or one with pcv,one with filter) covers tho because the plug in the valve will herp with not sucking up too much oil. Altho they still stuck up oil. Usually cause with performance set ups, having bigger rockers and guirdles, baffles under the covers are removed to make room and gives the oil a more direct shot through the pcv. I'm not real familiar with supercharged late model set ups, so perhaps I'm not the guy to answer. But that was my understanding for the reasoning for them on the gen1. It any block that sucking in oil and having a strong vacuum signal.
You need the vacuum source tho.

, no worries. I've researched this a lot and there seems to be a lot of different opinions on how to set it up correctly. I was just hoping someone on our board had some experience with this setup. Thanks again, cheers!

[71Dragtruck]

Not sure how similar yours is to my setup on my 6.2L Escalade, but I do believe it just goes directly from the vac tube on the blower to the inlet tube on the drivers valve cover, and to the intake tube ahead of the throttle body to the tube on the passenger side, no catch can.

I'd have to look closer at it, I'm working away from home right now so don't have access.

[Hart_Rod]

Originally Posted by 71Dragtruck

Not sure how similar yours is to my setup on my 6.2L Escalade, but I do believe it just goes directly from the vac tube on the blower to the inlet tube on the drivers valve cover, and to the intake tube ahead of the throttle body to the tube on the passenger side, no catch can.

I'd have to look closer at it, I'm working away from home right now so don't have access.

Thanks! Let me know when you get a chance.

[softballnrd27]

Look on LS1tech, there is a good selection of pics for every kind of setup. I have some pics on my home computer I can send you as well.