Replacement Fuel Vapor Separators: Now Available!

This site may earn a commission from merchant affiliate
links, including eBay, Amazon, Skimlinks, and others.

I currently pay $30/month for Shopify. I also have a couple fancy apps within Shopify that I pay additional for on a monthly basis. When I started out I was using Big Cartel because it was only $10/month - a super low bar to hit, and you can quit any time if things go south. One sale more than covers the Big Cartel monthly fee. Just sayin'.
 
Hey all- update on things: I went down a rabbit-hole of trying to improve the surface finish, did that, and then found that the settings / design changes resulted in them not holding pressure. So I'm making some more tweaks before I make a really big public launch.

That said, I do have several units (in both the two and three-bolt versions) that do hold pressure but have some minor surface blemishes here and there (basically on the overhangs).

Here's an idea of what I mean by blemish. You can see some rough texture on the beveled underside of the mounting fin:
IMG_6029.webp


I'm also nearly done w/ the website. For those who want to take a gander, here it is: compyfab.com. The email addresses listed there do work for anyone who wants to put in an order, but the short version is email me at sales@compyfab.com. For those who want a part now and are OK with some surface imperfections (it is a hidden part afterall), I'll knock $5 off the price and sell you one. The site has more details on the parts, fitment and cost.

Sorry for the lack of updates! Been wrenching in Fusion360 / Bambu Labs trying to get a nice quality result. As a reminder, if anyone has pics of the fuel separator that sits inside of the bench seat, I'd love to see em. I have no idea if any of the parts I've put together would fit, but I have a suspicion that the two-bolt model might. Time will tell.

Thanks again for all the support!
 
Last edited:
Hey All!

I'm now satisfied with the fit/finish and the part performance, and am now taking orders for those who are interested. As mentioned in the post above, you all can shoot me an email at sales@compyfab.com, or you can purchase them via my ebay store. Note that prices are higher on the ebay store, as they take their pound of flesh on the sale.
 
procomsignathid said:
Hey all- update on things: I went down a rabbit-hole of trying to improve the surface finish, did that, and then found that the settings / design changes resulted in them not holding pressure. So I'm making some more tweaks before I make a really big public launch.

That said, I do have several units (in both the two and three-bolt versions) that do hold pressure but have some minor surface blemishes here and there (basically on the overhangs).

Here's an idea of what I mean by blemish. You can see some rough texture on the beveled underside of the mounting fin:
View attachment 4025310

I'm also nearly done w/ the website. For those who want to take a gander, here it is: compyfab.com. Note that I do not have an eBay store setup yet (that link on the website won't work). The email addresses listed there do work for anyone who wants to put in an order, but the short version is email me at sales@compyfab.com. For those who want a part now and are OK with some surface imperfections (it is a hidden part afterall), I'll knock $5 off the price and sell you one. The site has more details on the parts / fitment, but in short:
- two-bolt model: $80 shipped to anywhere in the US
- three-bolt model: $85 shipped to anywhere in the US

So 75/80 respectively for parts w/ surface imperfections.

Sorry for the lack of updates! Been wrenching in Fusion360 / Bambu Labs trying to get a nice quality result. As a reminder, if anyone has pics of the fuel separator that sits inside of the bench seat, I'd love to see em. I have no idea if any of the parts I've put together would fit, but I have a suspicion that the two-bolt model might. Time will tell.

Thanks again for all the support!
Click to expand...
I have a nos bench separator for a 71 model. I’ll send you some photos next time I see it.
 
I did some testing and think I found the issue w/ email delivery. I tested from a few different friends accounts and found that accounts from gmail addresses weren't going through (may have been others as well), but after correcting some settings they seem to be going through now. Problem solved (I hope)!

If anyone else was having trouble reaching me, please try again or send me a DM here. Sorry about the issue!
 
I've had a few folks asking about the 60013 model for late 70s/80s FJ40s. This just arrived in the mail!

IMG_6175.webp


Glad I took on the other model first. This one is a more complex part in terms of overhangs. This should be a fun challenge 🤓, let the prototyping begin...
 
Been working on the 60013 prototype. I'd be curious for feedback from y'all- I'm thinking of changing the orientation of the top port:
  • It will be a simpler design / much easier to print (won't need supports)
  • It will line up easily with the current hose routing pathway
  • It's easy for me to include a short section of rubber hose with the part, as well as potentially a new check-valve bracket (and optional check-valve).
What do you all think? Here are some renderings:
Image 1-13-26 at 1.52 PM.webp
Image 1-13-26 at 1.53 PM.webp
Image 1-13-26 at 1.56 PM.webp


To give you some context, here is a photo of a 60013 separator with the check-valve + bracket. I angled the above port in the design above so that with a gentle bend of the hose it would line up correctly (factoring in the hose barb lengths) to the top of the check valve. I'm also looking into including brackets for the check valve with the separator:

60013 installed 2.webp
 
First prototype ready for test-fitting. This is a non-functional part made out of PLA, thus the color, the idea is really just to see if clearances are OK. I'm planning on meeting up w/ a local late-model '40 owner this weekend to test fitment out.
IMG_6185.webp

IMG_6186.webp
 
Met up with a local late-model '40 owner (1980), and was able to test-fit the part. Nearly dead-on, but needed a bit more clearance towards the top, and the upper port needed to be lowered a bit to allow for an existing hose to connect and have decent slack:
Test fitment


I was surprised to find out that his cruiser has the check-valve next to the charcoal canister, as opposed to the same compartment the vapor separator sits in. I think different model years approached this differently, case in point some of the photos I've found:
with check valve
without check valve


The updated design should work with both setups- I positioned the top port low enough so that an existing hose can reach it, and angled enough so that if there is a check valve in the same compartment, it can mount up just like the photo above (left) without too much of a bend with the fuel hose.

Here are some renderings of the new design:
Cross-section
Exterior Rendering


Most importantly... The first potentially-functional prototype is now printing!
Image 1-20-26 at 4.16 PM.webp


And lastly... My wife says the top of the part reminds her of a duck. I can't unsee it now 🦆
 
Some progress updates. I now have a working prototype that holds pressure! This is the 4th nylon iteration thus far. In the next few weeks I'm headed back down to Denver with it to ensure it fits as expected & get some photos of a complete install on a late-model '40:
IMG_6202.webp


For those curious about the process, I took some advice in this thread when I was working on the earlier versions and made a jig for dril/tap alignment. Here's what it looks like for this version:
IMG_6203.webp
IMG_6205.webp


And a bit more behind-the-scenes of the prototype/iteration process:
IMG_6204.webp

From left-to-right:
  1. OEM Toyota part
  2. PLA print for initial shape / fitment (seen in earlier pics). Fit was mostly good, but needed more clearance around top mounting hole and the top port needed to be lower for more slack on existing hoses.
  3. Nylon prototype #1: Leaked around top port due to layer adhesion / overhang problems, walls too thin in some corners as well.
  4. Nylon prototype #2: Still leaked, but much less. Layer adhesion issue at top port was better, but transition needs to be smoother. Loss of 1psi every 3hrs or so.
  5. Nylon prototype #3: Experimented with some different print settings to reduce warping (and thus ensure more reliable bed-adhesion). Had the opposite effect and had a print failure at hour 23ish. (which I didn't catch until I found the spaghetti in the morning :bang: )
  6. Nylon prototype #4 (current): Added some break-away supports / smoothed out overhang transitions. Holds pressure!
Today or tomorrow I will be receiving a Toyota OEM check-valve, which I may include as an optional extra for folks who want a combined assembly. It's mostly to ensure the new angled top port can still achieve clearances for setups with a check-valve co-resident with the vapor separator.

Once I am comfortable with the final fit on an actual truck, this version will be for sale. Will post updates soon!
 
Huge thanks to @AdamKFarmer for help last night, he has a late-model 40 and helped me with test fitment. Looks like the latest prototype is a success, and I am starting production! Here are a couple of photos we took that show the two installation patterns with the check-valve and without):

IMG_6265.webp
IMG_6269.webp

I will also be creating an optional add-on for those who want the check-valve setup. It will include the Toyota check-valve, a metal bracket, a pre-cut length of fuel hose, and two extra hose clamps. Price TBD, as I'm looking into manufacturing of a zinc-plated clamp to hold the check valve.

I'll be updating my website shortly to split out the 3 versions as distinct product pages.

For now, if anyone would like to order one of these, please email me at sales@compyfab.com or send me a DM here.
 
Last edited:
You must log in or register to reply here.

Share this page

Back
Top Bottom