Most typical catch cans are for one way air flow, the DSM catch can location is typically from the breather on the valve cover to the intake which is technically a suck and blow 2 way vacuum

So it sounds like the catch can you have is a 1 way filter. You can still use it, just drain it from time to time

GST with PSI said:

http://www.dsmtuners.com/threads/gstwithpsis-galant-vr4-1837-2000.482807/page-3#post-153527390

Click to expand...

Definitely a great setup, instead of the breather being vented you have it routed to the intake using the catch can as the T.

I'm inspired

@GST with PSI

Brett, he may be referring to the "cheaper" P&P catch can that gamble garage offers, the one that does not use AN fittings, but rather is designed to be placed "inline" between the valve cover and intake pipe being connected with only the regular vacuum line.

If so, I have it, I am running it and it worked great for a few months, but now I don't know if it's because I'm running more boost or the filter is plugged but anything above, say 25psi it'll blow the dipstick out, anything underneath and it's fine but I have to drain the catch can at least once a week.

OP could you post a picture of your catch can? I'm curious if you my style or the one with the AN fittings, which is what I'm going to need to get.

Yes it's the one with the Barb fittings not the an fittings. I requested 1/2" barbs to help relieve more crank case pressure. I'm also running a 68 hta at 28 psi and do not blow the dip stick out. I switched to a 2g dip stick and haven't had trouble. My motor is also original block with 247k miles on it. I will post pictures later. I chose the plug and play as I believe keeping the pcv valve is better I'm just upgrading the other side as I increase power.

guseclipse said:

I switched to a 2g dip stick and haven't had trouble.

Click to expand...

What do you mean you switched to a 2g dipstick? 247k on a 98 I'd hope you have a 2g dipstick .

Interesting, Yeah I didn't have any issues at first but I'm running the stock size barbs, I may upgrade to GST with PSIs setup here soon because something needs to be done. It's frustrating having all supporting mods for 28psi but overlooking the catch can has been a frustrating mistake, albeit entirely my fault.

I have a 92 galant vr4. My 98 gsx is under surgery.