134 replies to this topic

[saints9626]

This looks great!

 

I would really recommend using Fusion 360. It has most of the power of Solidworks but is completely free. I cannot use SketchUp after using professional software like SW and Autodesk inventor at work, it feels so clunky and slow, IMO.

 

Now I've finished uni I've lost my Solidworks student license, and Fusion 360 has been *almost* as good. 

 

I've been 3D printing for about 6 months now, and been using 3D CAD for 3 yrs+. I've not got a lot of experience compared to some, but if you need any help with the CAD/printability I'd be happy to help.

 

Currently spending most of my free time designing and printing interior parts for Mazda mx-5's so am used to designing for awkward shapes/overhangs.

 

Joe

[Mini Manannán]

This looks great!

 

I would really recommend using Fusion 360. It has most of the power of Solidworks but is completely free. I cannot use SketchUp after using professional software like SW and Autodesk inventor at work, it feels so clunky and slow, IMO.

 

Now I've finished uni I've lost my Solidworks student license, and Fusion 360 has been *almost* as good. 

 

I've been 3D printing for about 6 months now, and been using 3D CAD for 3 yrs+. I've not got a lot of experience compared to some, but if you need any help with the CAD/printability I'd be happy to help.

 

Currently spending most of my free time designing and printing interior parts for Mazda mx-5's so am used to designing for awkward shapes/overhangs.

 

Joe

 

Well I'll certainly give it Fusion 360 a go, I've not heard of that one.  I feel a wee bit reluctant after having put a lot of hours into Sketchup mind...!

[Mini Manannán]

I ♡ 3D Hubs !

 

 

 

 

This one is in 'carbon fibre' - maybe a sprinkling of carbon dust in it.  It's supposed to be less affected by chemicals and it was only £9 to print so I thought I'd give it a try.

 

The finish isn't quite as good, as in the bottom edge where it sits in the carb isn't quite as sharp.   It'll need to be spun up on the lathe again for a light sanding.  Obviously this 'carbon fibre' is a bit more difficult to work with because the first attempt was poor, he had to reprint it in two halves and then bond them together.

[Mini Manannán]

This looks great!

 

I would really recommend using Fusion 360. It has most of the power of Solidworks but is completely free. I cannot use SketchUp after using professional software like SW and Autodesk inventor at work, it feels so clunky and slow, IMO.

 

Now I've finished uni I've lost my Solidworks student license, and Fusion 360 has been *almost* as good. 

 

I've been 3D printing for about 6 months now, and been using 3D CAD for 3 yrs+. I've not got a lot of experience compared to some, but if you need any help with the CAD/printability I'd be happy to help.

 

Currently spending most of my free time designing and printing interior parts for Mazda mx-5's so am used to designing for awkward shapes/overhangs.

 

Joe

 

Cheers Joe, i got round to downloading Fusion 360 last night and gave it a go.  There's a whole new way of working but it does seem a bit easier to do things, there's a lot whole range of tools Sketchup doesn't have and speeds things up.  I'll have another blast at it on night shift tonight.

[Spider]

Tim, you'll have to learn me on this 3D stuff. I've been using a poor mans 2D CAD happily for many years but I've certainly hit the wall with it now days and definitely need to go the extra dimension.

[Mini Manannán]

Tim, you'll have to learn me on this 3D stuff. I've been using a poor mans 2D CAD happily for many years but I've certainly hit the wall with it now days and definitely need to go the extra dimension.

 

I downloaded Fusion 360 last night Chris.  I got it running (you'll need to invent a learning institution) and watched this video:

 

 

There's a part 2 and 3 as well.

 

I went along bit by bit, fast forwarding and rewinding to get things right (A 20 minute video took 3 hours ).  Yer man explains it nicely.  

[Spider]

OK cheers mate - will do

[Rhcp4life]

How's it working?

[DeadSquare]

At £2-73 for a pair, I'm going to chop the bellmouth off Vuvuzelas.

Edited by DeadSquare, 11 August 2019 - 09:20 AM.

[Retroman]

Wow lot of work guys seriously well done

 

We tested 2 prototype HS4 1 1/2inch 3D printed ram pipes on the engine dyno One was quite a surprise

 

3 direct back to back runs compared to a 20mm ramstack ( long 90 degree radius solid alloy with 2 bolt holes on the face)

 

The long 3D one was about 5 1/2 inches and moved the torque down the rev range with no real gains

 

The big surprise was a 40mm 3D one...6 degree taper down to the mouth with a 3mm full radius on the outer edge

 

That made some good gains up to 2 lbft torque from about 2700 revs to over 6400

 

Both had a smooth surface finish.

 

Ministocks regs don't allow anything longer than 20mm so we compared the ramstack (as above) to our HS4 Stub stack

 

Gains were 1 lbft max but its still a gain, % wise it can be over 2 %

 

Not sure why we got the gain but the face on ours is clean which can only help. The dashpot breathes through 2 slots up the back.

 

 

http://www.retromini...roducts_id=1241

 

Summary;

Compared to 20mm ramstack

3D  5 1/2 inch no gains moved torque down 500 revs

3D  40mm best 2 lbft

Alloy Stubstack 1 ilft max

 

It has to be said on a different engine different results will be found, cc's, head, cam, timing etc all throw in different demands.

[Mini Manannán]

How's it working?

 

 

Um...  Do you mean Fusion 360 or the bellmouth?

 

Fusion 360 is fantastic.  Really powerful and fairly easy to get your head around.

 

The bellmouth has moved on.  I couldn't fit that ⬆︎⬆︎⬆︎ one in my custom airbox so I designed one that would do:

 

 

After a few trial prints to get the inlet radius just right:

 

 

Detail shot:

 

 

I must get one sent off to TurboPhil for flow testing.  The one above ⬆︎⬆︎⬆︎ flowed an extra 5%, I'd hope this one would be about the same.

[Rhcp4life]

I've been working on one my self. Started today and first time using fusion. it is pretty awesome. 

 

Would you care to share the Fusion model?

 

Attached Files

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[Mini Manannán]

I've been working on one my self. Started today and first time using fusion. it is pretty awesome. 

 

Would you care to share the Fusion model?

 

Which one?  The ⬆︎⬆︎⬆︎one or the latest version?

  Drop me a PM.

[Retroman]

 

How's it working?

 

 

Um...  Do you mean Fusion 360 or the bellmouth?

 

Fusion 360 is fantastic.  Really powerful and fairly easy to get your head around.

 

The bellmouth has moved on.  I couldn't fit that ⬆︎⬆︎⬆︎ one in my custom airbox so I designed one that would do:

 

 

After a few trial prints to get the inlet radius just right:

 

 

Detail shot:

 

 

I must get one sent off to TurboPhil for flow testing.  The one above ⬆︎⬆︎⬆︎ flowed an extra 5%, I'd hope this one would be about the same.

 

 

Looks good, wondering why the fiddly flange on the back ? I can see that creating fitting / gasket problems (they vary)

 

I would also say the countersunk bolt heads are a good idea, but will potentially cause misalignment with the actual throat

 

There does need to be some wriggle room as all carbs are not eactly the same, the countersinking will work as a centering point.

 

I find they need a good 0.75 mm wriggle room on the bolts to align the thoat, which is the whole objective

 

No wish to rain on your work as its obviously very good, but now is the time to iron out any potential probs

 

I do like the look of the top curved throat profile, just think they need to be a bit thicker and then use either standard cross head screws or allen cap heads....(nobody will have countersunk 5/16 UNC bolts)

 

If you are just making a one off it will be fine but for a run of several you need some allowance for the production tolerances SU were not as precise as you

 

You might also find the lower corners need to be a bit nearer the centre as they will need to fit cone filters, which are tight

[nicklouse]

 

 

How's it working?

 

 

Um...  Do you mean Fusion 360 or the bellmouth?

 

Fusion 360 is fantastic.  Really powerful and fairly easy to get your head around.

 

The bellmouth has moved on.  I couldn't fit that ⬆︎⬆︎⬆︎ one in my custom airbox so I designed one that would do:

 

 

After a few trial prints to get the inlet radius just right:

 

 

Detail shot:

 

 

I must get one sent off to TurboPhil for flow testing.  The one above ⬆︎⬆︎⬆︎ flowed an extra 5%, I'd hope this one would be about the same.

 

 

Looks good, wondering why the fiddly flange on the back ? I can see that creating fitting / gasket problems (they vary)

 

I would also say the countersunk bolt heads are a good idea, but will potentially cause misalignment with the actual throat

 

There does need to be some wriggle room as all carbs are not eactly the same, the countersinking will work as a centering point.

 

I find they need a good 0.75 mm wriggle room on the bolts to align the thoat, which is the whole objective

 

No wish to rain on your work as its obviously very good, but now is the time to iron out any potential probs

 

I do like the look of the top curved throat profile, just think they need to be a bit thicker and then use either standard cross head screws or allen cap heads....(nobody will have countersunk 5/16 UNC bolts)

 

If you are just making a one off it will be fine but for a run of several you need some allowance for the production tolerances SU were not as precise as you

 

You might also find the lower corners need to be a bit nearer the centre as they will need to fit cone filters, which are tight

 

flange on the back I guess is to do with the radii on the carb mouth. and should help with correct alignment but the countersunk bolts could mess that up.