PVC Catch can system.... Final conclusive answer

[cjmatt]

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

[unclebens]

Originally Posted by cjmatt

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?

[SKINNY69]

Originally Posted by unclebens

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.

[spaz1]

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

[cjmatt]

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

[LS69TA]

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.

[96silverram]

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


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