Originally Posted by runutzzzzz

What's the difference between this and a catch can?

Originally Posted by Theta

Have I mentioned that I hate the mobile posting option for this site?

Let's try that again:

Catch can sits in line with the normal PCV system and catches blow-by gases. Depending on the quality of the construction and element, they can range from performing very poor (eBay crap) to taking care of all oil/blow-by issues entirely (and range everywhere in between).

What catch cans can't do is relieve the crank case pressure, which is already proving to be an issue on some FI cars. There's no pattern yet, but there have been several that have blown out seals. This was an expensive (there's no arguing that) option, but I think in the long term it will be worth the expense.

I have no idea if it works, but I'm willing to bet LMR knows what they're doing.

Originally Posted by Theta

Actually, that was mentioned at one point, and I think that would essentially work the same. You could do that, but you'd have one hell of a mess on your hands! I've seen it done on Coyotes, etc. Essentially this is a remote breather like they use (only using 1 box instead of 2 cans).

You'd also want to vent or bypass the other lines if you went that route.

Originally Posted by Theta

For supercharged cars with catch cans, I believe check valves are involved.

I don't want to stray too far off topic from the LMR box, though.

VNAMVET has an excellent thread put together on a N/A catch can install. I think the difference with FI is the need for check valves.

Originally Posted by Skunkworks

You’ll be fine with powder coating, what it does fill in will actually make it look better. It’s not like they will deposit 1/8 of an inch. Look at your supercharger volute, for reference on a slight wrinkle/textured finish.

I wouldn’t powder coat an intercooler as it will inhibit thermal transfer. On the other hand, anodizing microscopically etches surface, which some believe increases thermal transfer due to additional surface area and turbulence – this was my reasoning along with corrosion resistance. Also quality core manufacturers like Bell do a mild natural anodize after oven brazing.

Oh, I’d ask for a semi-gloss lightly textured finish, hides imperfections if powder coating.

Originally Posted by runutzzzzz

So the LMR box has check valves?

Originally Posted by Late Model Racecraft

A catch can plumbed in line with the factory pcv system would need check valves due to it being connected to the factory intake piping. these check valves would prevent you from "boosting" the crank case by introducing positive pressure into it. Our system uses a catch can/breather setup. This allows it to still catch any oil droplets that might come out of the valve covers etc but also allowing them to breathe off any positive pressure in the crank case. Since no engine seals up 100% when you introduce say 8psi of boost into a cylinder a small amount of that will pass the rings and go into the crankcase. This is the pressure you want to relieve. When this happens the factory PCV system cant relieve it fast enough and If you dont relieve it, it could build up and push a seal out. i have heard numerous stories about it already on anything from a stock car with a Pfadt bolt on supercharger kit to a one off supercharger kit with a fairly large head unit.

-Reid

Originally Posted by Theta

Alright, as promised, here is an optional list for general dress-up.

You can see that the kit comes with Pro 350 braided -10AN hose, but only includes standard Gates rubber hose for the -6AN connections. As LMR posted earlier, the 45-degree -10AN hose ends are now standard, so they have been left off of this list.

On the other end, you will need a T or Y adapter to split between the oil reservoir and the passenger-side rocker PCV fitting - you could use a cheap 3/8" T adapter and use clamps, etc. - I did that at first, but I wanted it to be dressier, as it's a nice showpiece.

For reference, this is for a supercharged C7, not turbocharged. These are all Jegs part numbers:

555-110312 | -6AN Flare Cap | $4.69 | Qty: 1



361-AT982406 | -6AN AnoTuff T Fitting | $13.99 | Qty: 1



555-110001 | -6AN Straight Hose End | $5.99 | Qty: 3



555-103301 | #6 Hose Finisher | $5.99 | Qty: 2



555-110011 | -6AN 45-Degree Hose End | $15.99 | Qty: 1



555-110911 | ProFlo 350 Braided Hose -6AN 6-Foot | $31.99 | Qty: 1




Total part cost is $96.61 shipped from Jegs. Up to you on the value side of things, but the improvement in looks, alone, was enough to spend the extra money.

Keep in mind that even if you don't go this route, you will need to source a T-line and hose or fuel clamps.

And finally, a diagrammed look at these parts...

Originally Posted by OddJob1971

Theta, thanks for putting this list together. My LMR can will be here today so I'm gonna order up these parts you suggested. Appreciate all the effort.

Originally Posted by OddJob1971

Theta, do you have any pictures of the overall routing for hooking this up to the system?

Originally Posted by Theta

Awesome! I'm glad to hear this helped - I wasn't sure anybody would end up using the info.

Originally Posted by Theta

Got the breather back from the powder coater today, and I think it turned out really nice. Let me know what you think!

The 'blank' areas were taped for threading, and solid sealing of the filters if the powder had a problem with the silicone seal. All on-purpose and covered as you see!