For you guys out there running an external vacuum pump, how exactly did you guys route your lines??

 

i would do the second setup, but with the catchcan inbetween the block and the pump.

 

Any others out there that are running this??

 

What kind of vacuum pump are you using? I wasn't aware of any mechanically-driven pumps for CCW Honda's...closest thing being the Moroso external oil pumps, and that's not a vacuum pump at all.

If it's designed to be able to handle oil vapor and not get clogged or damaged from the build-up, then you can the catch can after the pump.

If the pump wasn't made to handle anything more than air (like a brake booster pump), then you need to take precautions to keep the oil vapors from getting into the pump...at least that's what I've been told.