Catch can project complete with update

[Winerocks]

Hey Scarab folks, I’ve been working on installing catch cans on my 215 twin 250HP. Fabricated the mounts last night, and got them installed this morning. For those of you that aren’t familiar with catch cans, they prevent oil vapor and other crankcase vapors from being returned to the air intake. Over time, this crankcase crud can reduce supercharger efficiency and eventually plug the intercooler among other things. The crankcase vent is diverted to a “can” where the vapors are condensed and trapped. I was in a bit too much of a hurry to take pictures of fabricating the mounts, but I cut spirals out of 4” stainless process pipe, and welded a bracket to the bottom of them to mount to the exhaust manifold. There are catch cans available from Riva and Fizzle, but the both just vent to the engine compartment. I went with ones that return the “cleaned” air back to the intake. The cans that vent to the engine compartment increase fumes, smells, and potentially messy oils in the engine bay. The cans I used were from Amazon for $25 each. Here they are installed:

 

[ShlepRock]

Looks good and good idea! Let us know how much they catch over time.. Curious to see..

 

[Winerocks]

I’ve seen some youtube videos of some ugly sludge on superchargers and intercoolers; mostly on jetskis, but ugly nonetheless. I figured it can’t hurt, and it’s a little peace of mind.

 

[Rtimleck]

Nice clean work!

 

[Winerocks]

Nice clean work!

Thanks! I wanted them to look like they were meant to be there.

 

[Winerocks]

I’ve put around 15 hours on my boat since the catch can install. The can’s dipstick was coated in oil, and the stainless scrub inside is all coated in oil.
This is good because it means the catch can is catching. The purpose of the scrub in the can is to stop sloshing and provide a massive surface area for the fumes to condense. The bottom of the can had some oily crud, but not much.
In retrospect, I should have done before and after weights; which would have given me an actual amount of oil/crud caught. This stuff stinks like gasoline btw (as expected).
I’m pretty easy on my boat, and don’t typically run it much over 5000 RPM. The higher RPM you run, the more blow-by is going to occur. Whether or not catching this stuff will increase engine, supercharger, and sensor longevity I can’t say, but it is definitely doing what I hoped it would.
Hope this helps for those of you who have thought about installing catch cans.

 

[2019scott195wake300]

can you please post the link to amazon. Im going to put this on my 300

 

[Winerocks]

Ruien 0046 Polish Baffled... Amazon.com: Ruien 0046 Polish Baffled Universal Aluminum Oil Catch Can Reservoir Tank Black: Automotive

This should get you there. You will need around 3’ of 19/32” fuel hose to go along with it; depending where you mount. It’s a couple bucks per foot at Autozone. The hose that comes with it is garbage.

 

[anmut]

That install is clean AF, nice work!

 

[Winerocks]

That install is clean AF, nice work!

Thanks!