i ran each of my valve covers to 2 port catch cans. one on each side, the inlet comes from the valve cover, the outlet runs to my exhaust. When I rev the engine at idle with the lines unhooked, I can feel a substantial vacuum getting pulled from the exhaust

 

Is it possible for the exhaust to have back pressure and push exhaust into the valve cover?

 

You need check valves to keep that from happening.

 

You should put them in the exhaust at an angle. The checkvalves that are used for the air system work if you relocate them,

 

yup, its got one way check valves, but I dont know how necessary they are. the ports into the exhaust are at like a 45 degree angle, so it pretty much works all on venturi effect

 

Yep, put the evac tubes in the exhaust at a 45* angle. Atleast a few inches into the collectors IMO so there's no chance of reversion. On our jetboats we usually have them atleast 5-6" after the collectors.

 

Does anyone know if this catch can is still available? If so, what site sells the item.
Thanks


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i would like to know that as well.

 

PM me where to get sum of this.

 

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I used to sell them. I dont any more but am looking to have them made again. I have seen a big push to have them offered again. I am working with two machine shops now to see what we can do.

 

ok so run the valvecovers to a vented can like in the picture above. my motor is being build but isnt there a spot on the valley cover? what do you do with that?

 

I'd like to see someone put together a nice package with can, lines and evereything you need to run a complete system for the different FI application.

 

Here is how I ran mine:





-10 AN between the valve covers with a -12 AN running to a Moroso breather. The 10 AN lines had bungs welded into the covers (I milled the covers to sink the bungs in flush) and the -12 AN is where the factory PCV port was (rear of driver's side cover) so the baffling is still in place. No discernible oil in the intake at 6-7 psi of boost, we'll see how it handles 15-18 this summer.

Oh, and FWIW, the fuel pressure regulator and return line have since been relocated to somewhere better.

edit: In more detail:

 

So your PCV system doesnt vent to anywhere? Wut?

 

I was planing on running -10 to each port or do I need a third line to pull out the pressure

 

Oh plan on single front mount 10psi around 550-600

 

I would do a 3 port, 1 from each cover and the 3rd port should be used to pull vacuum, usually from the turbo inlet.

 

I was going to use that for my boost controller

 

Boost controller should referenced after the IC to take into account pressure drop after the air goes through the intercooler.

 

I forgot about the pressure drop .. So then it would be intake to boost controller and wastegate to boost controller