Catch Can (Yep here is another thread on it)

[VR30Infection]

None of these pics are from a VR30... I'd be willing to bet they're from some German vehicle. It took a while for VW & BMW to get it figured out, but eventually even they did.

As I said, a solution looking for a problem.

I too was once paranoid about this because of internet forum rhetoric and pulled my C7 intake manifold off religiously because of it. Know what I found after 70k miles of doing it? Absolutely nothing worth addressing. Heck, I even pulled my C8 intake manifold a few times just to check; same story.

It was actually interesting, GM wouldn't void warranties for headers, intakes, cats, etc. but they'd void a powertrain warranty on the spot as soon as they saw a catch can.

that’s not actually true. The VR30 is known for at as well. I had a Q50 and my tuner suggested the cleaning service that is performed on both the Nissan and Infiniti dealers. The pics above are from random direct injection engines though. But direct injection is direct injection. This is why Toyota started doing duel fuel injection setups. Direct for the mileage and performance benefit and port to keep things clean. Another way to deal with it is water/meth injection. Works on any engine but if meth is used then you have to tune for it.

 

[KrackaC8]

DI is not just DI; it varies greatly. Did your tuner show you actual build up on your VR30 intake valves, or was he just throwing it out there as probably maybe a good idea?

Just because dealerships offer something, doesn't mean its truly beneficial (it means its just a profit driver). They've been offering fuel injection and throttle body cleaning services for decades...

But again, everyone needs to assess their own comfort level and risk profile and mod, or not, accordingly. For whatever reason, catch cans are always the #1 most divisive topics across all forums regardless of make, model, etc. I'm not going to tell anyone not to buy one if they want to, but I will state my reasons for not buying or recommending them.

 

[FSUZ33]

None of these pics are from a VR30... I'd be willing to bet they're from some German vehicle.

First off…that was sarcasm, for those that didn’t catch it.

Second…lol!
Searched for “grenaded engine” and it was all v8s, so I changed my search to “grenaded v6” and it was page after page of BMWs.

Don't take my advice on catch cans anyway. I’m so finicky about my Z, I adjust my swaybars after food holidays for perfect balance.

 

[VR30Infection]

My question would be how are some direct injection engines different? If they have a PCV and are ingesting an oil/ air mist and there is nothing washing the intake runners or the back of the valves, then how would it be different? Honestly asking as I cannot think of a way for this to be possible. I’m not saying all DI engines are the same. I am saying that all have the same issue. As far as the tuner is concerned, he is one of the longest in the business and very reputable. He wasn’t making any money off of the suggestion but did state that it is a great service that he has seen great results from. And same. I’m not trying to talk anyone in to buying a catch can. I am however stating that I think it is a small price for some added insurance. With real world results. I have seen the oil that is collected. I’m glad it was in the catch can rather than the alternative.

 

[VR30Infection]

P.s. Here’s a vr30 from a q60.

 

[FSUZ33]

Although they look like booger welds made by a 6 year old, all that crust in the intake and on the valves is what they call “Power Poppers.” They’re concentrated petroleum nuggets. Highly explosive. When they get big enough they fall of into the combustion chamber and BOOM, like +40hp. It literally only lasts like 1/60th of a second though, so you never really know.

Either that, or they fall off, stick to the valve seat and you lose compression. Not all of them are honorable enough to go out like warriors.

 

[Tranzor Z]

Curious to see dyno numbers after a catch can install.

 

[FSUZ33]

60K miles on a VR30DDTT with no catch can below, thanks to “I Do Cars.”
Couldn‘t find a comparable pic with a catch can.

For the Anti-Canners:
A. You’re jealous because you’re not cool like us Pro-Canners?
B. You’re certain they serve zero purpose and are ridiculous?

 

[KrackaC8]

https://www.mishimoto.com/baffled-oil-catch-can-pcv-side-2023-nissan-z.html

 

[TheRoyalStig]

I work with couriers all day. Most of these drivers have 200k miles or more and been reliable trucks and cars. I've seen some drivers with 500k miles. None of these people have ever used or probably even heard of a catch can. This is just my opinion but I think they were created and a trend followed, nothing more.

That is not particularly relevent to what was said there.

 

[papozalsa]

During the Florida Z Fest I was talking to the owner of Boosted 6, he had 2 catch cans in his Z. He still do not have them listed in his website. He did explian to me the reason for the 2nd one, similar to the reason for the right side.

 

[FSUZ33]

During the Florida Z Fest I was talking to the owner of Boosted 6, he had 2 catch cans in his Z. He still do not have them listed in his website. He did explian to me the reason for the 2nd one, similar to the reason for the right side.

Boosted6 brand catch cans? Interesting. Curious if there are any differences between theirs and the handful already available.

 

[5amp5on]

There is nothing WRONG with a catch can, that’s for sure, and it gives me something else to do with my Z, so my catch can makes me smile. And that’s all that matters to me in the Z world.

 

[VR30Infection]

If anyone lost power on a dyno with a PCV side catch can vs without, it means that there was a leak and they were loosing boost.

 

[Tranzor Z]

Sounds to me like everyone supporting a catch can should go apply at Nissan since they know more than their engineering department lol.