how much blow by does our cars get to need a catch can?
DIY Oil Catch Can Installation for ALL 4Cs
First of all, shout out to @smc4C for his write up and @Keiji Takahashi for the inspiration that gave me the motivation to do this for my car. I decided to do the DIY install @smc4C posted except with the ADDW1 catch cans using the location that @Keiji Takahashi used to mount them.
I decided to do a little extra work and design a bracket to use the same location those guys but that would make install easier as well as get the can inlets and outlets higher. (more on that below)
Once I sorted out the catch can bracket design to get it perfect I was off to the races. This was a really simple install once I had the plug and play bracket for the coupe. I didn't need any heat, or lube, or any other tricks to put the hoses on either like I thought I might which was an added bonus and sped up install.
Update Below:
@John4C reached out to let me know that the area that the bracket mounts in the coupe is the same in the spider. The reason I thought there was a difference is because I thought the spider guys were using two factory threaded spots like the bracket does. The other issue I ran into with keeping them mounted at that height (without the bracket) was that I could not unscrew each catch can to service them like I wanted in order to make it turn key. The third reason I ended up making the bracket is that the bracket makes install of the cans incredibly easy and straight forward as you do almost all assembly outside the car where you have all the space and dexterity you need to properly assemble and align the parts. This is the best part of the bracket as I tried installing the cans in the location without the bracket before making this. It was incredibly tedious and next to impossible to get it all lined up how I wanted.
One other thing to note is the bracket makes the inlets and outlets of the can in between the height of the PCV and the intake manifold which is great because it keeps things moving downhill. Without the height of the bracket you would most likely be mounting the inlet and outlet of the catch can below the intake manifold which would put it at risk for oil filling up the catch can.
Here are some pics of the bracket and install.
![Rectangle Font Auto part Fashion accessory Metal]()
The bracket: I know what you are thinking. How did it take a few revisions to come up with that??
![Camera accessory Cameras & optics Cylinder Optical instrument Auto part]()
The bracket was designed specifically for the ADDW1 cans but from what I have seen you could attach any universal can to it.
![Light Motor vehicle Automotive fuel system Automotive design Vehicle]()
Tucked in the corner neatly out of the way but still very easy to unscrew the bottom and check for oil.
![Hood Motor vehicle Automotive fuel system Automotive design Vehicle]()
This is how I routed the hoses to try and keep the radii from being too small and to use existing hardware to shape the routes.
![Land vehicle Vehicle Automotive tail & brake light Automotive tire Automotive lighting]()
Beau's cover doesn't impede the ability to do this mod at all.
I decided to do a little extra work and design a bracket to use the same location those guys but that would make install easier as well as get the can inlets and outlets higher. (more on that below)
Once I sorted out the catch can bracket design to get it perfect I was off to the races. This was a really simple install once I had the plug and play bracket for the coupe. I didn't need any heat, or lube, or any other tricks to put the hoses on either like I thought I might which was an added bonus and sped up install.
Update Below:
@John4C reached out to let me know that the area that the bracket mounts in the coupe is the same in the spider. The reason I thought there was a difference is because I thought the spider guys were using two factory threaded spots like the bracket does. The other issue I ran into with keeping them mounted at that height (without the bracket) was that I could not unscrew each catch can to service them like I wanted in order to make it turn key. The third reason I ended up making the bracket is that the bracket makes install of the cans incredibly easy and straight forward as you do almost all assembly outside the car where you have all the space and dexterity you need to properly assemble and align the parts. This is the best part of the bracket as I tried installing the cans in the location without the bracket before making this. It was incredibly tedious and next to impossible to get it all lined up how I wanted.
One other thing to note is the bracket makes the inlets and outlets of the can in between the height of the PCV and the intake manifold which is great because it keeps things moving downhill. Without the height of the bracket you would most likely be mounting the inlet and outlet of the catch can below the intake manifold which would put it at risk for oil filling up the catch can.
Here are some pics of the bracket and install.
The bracket: I know what you are thinking. How did it take a few revisions to come up with that??
The bracket was designed specifically for the ADDW1 cans but from what I have seen you could attach any universal can to it.
Tucked in the corner neatly out of the way but still very easy to unscrew the bottom and check for oil.
This is how I routed the hoses to try and keep the radii from being too small and to use existing hardware to shape the routes.
Beau's cover doesn't impede the ability to do this mod at all.
1 - 20 of 45 Posts
Thank you for posting - that is a nice bracket you fabricated!
As it so happens, I also did an install a couple weeks ago on my coupe. I was able to fit the SpeedWow cans (SPEEDWOW Oil Catch Can Tank... https://www.amazon.com/dp/B086H9SSG1?ref=ppx_pop_mob_ap_share). These cans do fit without any bracket nor modification to the car. Just had to get the right length bolts and washer stack similar to @Keiji Takahashi (buy extra washers to shim the bolts to the right length. I also was able to install with no heat nor lube.
Here’s a pic for anyone who is thinking of doing this (highly recommend). As @thatarchitect says, it’s a straightforward install.
I didn't have an existing body bolt in that location. This is how it looked before I installed the bracket. (below)
I bet the height difference in the cans was just the amount I needed to raise mine to get good clearance for servicing.
1 - 20 of 45 Posts
