Super Jet 3D Printed Adapter for Stock Airbox

[rossthaboss11]

Guys,

I wanted to share a part that I made from a 3D printer to adapt the stock airbox to a set of BlackJack carbs. I did some research and found adapters from @Mark44, Thrust Innovations, and Wamiltons but none of those were for this exact style airbox and these carbs which do not have anywhere to bolt to. I bolted everything up last night but have not put it to the test yet. I will keep an update on whether it holds up or not but i am pretty sure it will be fine. These are my first prototypes with a quick paint job.

 

[rossthaboss11]

Since the 3D printer is not the greatest at printing threads I just put in a pilot hole and tap it out myself afterwards. There is a lip on it as well to prevent the hose from sliding off.

 

[Ducky]

What intake manifold are you running?

 

[rossthaboss11]

Riva

 

[DAG]

Are you printing with Nylon? I've found ABS and PLA don't hold up the fuel over time

 

[Ducky]

Riva

Really? interesting. I have a riva intake as well, but my dual 44 carbs are spaced out too far to use a stock flame arrestor like you are using.

 

[rossthaboss11]

I know what you mean. when installing this i noticed they were slightly different in spacing but the hose allows enough flex for it to fit. I have BJ 46's by the way.

@DAG thanks for letting me know. I wasnt sure about this and was going to look it up but totally forgot. They are made from ABS so i will keep my eye on that. If it doesn't hold up perhaps I can coat the entire piece with something that resists it. The paint i used was high temp engine enamel so that may even work. I have another 3D printer but i am not sure what material that one uses.

 

[DAG]

Our CubePro will accept all three material types and it's a cheap low end printer. Don't want to assume but I think most might also

 

[Gliderskier]

I like the idea but that design may be a little to "tall" for aftermarket hoods. U kn know the first generation thrust one was to tall for my rickter so i had to go with the low profile ones

 

[txsuperjetfreak96]

Id love one for my fs 48s


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[jdmforlife]

I would be down to try a set of these....

 

[superjetguy]

Just want to say great idea! But If you could make adapters from the 3bolt like on 38s to the 4bolts on the 44s to run that style intake I would be down to buy some sets of those !!


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[speedysprocket]

Why use the hose? Can't you make the plastic piece so it fits snugly onto the carb and tighten with a hose clamp? Maybe you need to have a slit to let it compress tight enough, but it will be a lower profile...

 

[rossthaboss11]

Thanks! I checked on the specs of the high temp engine enamel i used and it is resistant to gas/oil/chemicals so I will coat the whole piece in that. @Gliderskier is right this makes the intake a little taller than normal so it may be a problem with a lowered hood or aftermarket hulls. I don't have any aftermarket skis available for me to test it on. Still haven't been able to ride and test this out yet, hopefully this week.

@superjetguy I could easily make these for that setup but will need a little more info. A picture of the top of the carb/s and intake plate you are trying to go to will help for now. If I understand what you need correctly I think it would be very easy for @Mark44 to make. This picture is what he made to bolt to a carb with 4 bolt holes on it. Sounds like you just need this with three holes instead?

@txsuperjetfreak96 would a hose with a 2.75" I.D. fit on your carb adapter? Pretty sure it should i think they are all the same size no matter what the carb size is. If this is true this can adapt to any size carbs. Keep in mind this is mainly for carbs without bolt holes in the top to mount to.

 

[txsuperjetfreak96]

Thanks! I checked on the specs of the high temp engine enamel i used and it is resistant to gas/oil/chemicals so I will coat the whole piece in that. @Gliderskier is right this makes the intake a little taller than normal so it may be a problem with a lowered hood or aftermarket hulls. I don't have any aftermarket skis available for me to test it on. Still haven't been able to ride and test this out yet, hopefully this week.

@superjetguy I could easily make these for that setup but will need a little more info. A picture of the top of the carb/s and intake plate you are trying to go to will help for now. If I understand what you need correctly I think it would be very easy for @Mark44 to make. This picture is what he made to bolt to a carb with 4 bolt holes on it. Sounds like you just need this with three holes instead?

@txsuperjetfreak96 would a hose with a 2.75" I.D. fit on your carb adapter? Pretty sure it should i think they are all the same size no matter what the carb size is. If this is true this can adapt to any size carbs. Keep in mind this is mainly for carbs without bolt holes in the top to mount to.

It would b just perfect


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[Balduccimoto]

The fuel will turn those in goo very quickly. There are other materials that are more resistant and can be extruded with the proper equipment .. Although at a much slower rate. You can experiment with epoxy but a lot of care is needed to be sure that it is properly sealed.

PM me if you'd like to have these printed in another material and your printer isn't sufficient enough to do it.

 

[txsuperjetfreak96]

The fuel will turn those in goo very quickly. There are other materials that are more resistant and can be extruded with the proper equipment .. Although at a much slower rate. You can experiment with epoxy but a lot of care is needed to be sure that it is properly sealed.

PM me if you'd like to have these printed in another material and your printer isn't sufficient enough to do it.

Wondererd about this and using at least a 50/50 race gas mix


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[rossthaboss11]

So its been a few months and the design finally failed. The gas definitely has some affect on the ABS, nothing crazy but you can tell its starting to eat away at it. The paint was eaten away some too. But the main reason it failed was due to the threads in the plastic stripping out which i thought might happen over time.

That being said the design worked great and looked good, however the durability of it did not hold up. Some changes to the mounting could be made such as inserting a nut into the 3D piece which would avoid having the threads in plastic. Or have the 3D part printed with metal if you have that capability. And the other change would be to make it from a different material which stands up to gas and even race gas.

 

[Balduccimoto]

So its been a few months and the design finally failed. The gas definitely has some affect on the ABS, nothing crazy but you can tell its starting to eat away at it. The paint was eaten away some too. But the main reason it failed was due to the threads in the plastic stripping out which i thought might happen over time.

That being said the design worked great and looked good, however the durability of it did not hold up. Some changes to the mounting could be made such as inserting a nut into the 3D piece which would avoid having the threads in plastic. Or have the 3D part printed with metal if you have that capability. And the other change would be to make it from a different material which stands up to gas and even race gas.

Taulman 3D makes some other materials that is solvent resistant. I'm pretty sure the nylon is, but it is very difficult to get it to stick to the bed. I used a heated bed with a raft and a purple glue stick for it to stick. Also it takes a little longer to print because it doesn't flow like ABS. Another issue is that there is no colors available for their nylon products. You would have to use dye on a stove to get the color you want.

I have their nylon 618 here, I will check later how resistant it is to gasoline.

There is also heat set inserts on McMaster that work great, I use them on all my motorcycle products.