Working on an Intake project

barbagris · Feb 25, 2018

Claviger said:
Posting this here so I don't lose it again, its not the easiest post to find these days

- I learned a hell of a lot from Wayne.

Claviger said:
Backplate made from 1mm aluminum sheet, funnels are in the mail, due any day now.
Still need to clean up the edges, but $9 and 1/2 hour work vs $35 for a steel version is a win in my book.

But work? do we have to resort to such words. :laugh:

Claviger · Feb 25, 2018

Perfect example of what I hope to achieve here:
Runner Length Tuning...ITB style - www.neons.org

So, I’ll have some 6” printed, and I have 3”, and 1.5” already, should give a curve of sorts showing how the power is being shaped by various lengths to give a basis to figure out the best length.

Steel · Feb 25, 2018

barbagris said:
- I learned a hell of a lot from Wayne.
But work? do we have to resort to such words.

I spent 5.5 hours speaking to Wayne yesterday. The man is a wealh of knowledge, and a really good guy. :thumbsup:

Ishrub · Feb 25, 2018

Claviger said:
Perfect example of what I hope to achieve here:
Runner Length Tuning...ITB style - www.neons.org

So, I’ll have some 6” printed, and I have 3”, and 1.5” already, should give a curve of sorts showing how the power is being shaped by various lengths to give a basis to figure out the best length.

The various lengths in the posted thread all use straight cut pipe rather than bell mouthed trumpets (velocity Stacks) depending on the length couldn't this have as much or more effect than the varied length itself with a v.stack? i.e. depending where the 'pinched down' effect in the diagram below ends.
Velocity stack - Wikipedia

I tried a link in that thread you posted and found these in Oz.
@Claviger You can obviously get your custom printed versions but do you think would these be of possible worthwhile use for other's projects.

Velocity Stacks
Product Details: VS63_90
Velocity Stacks Au$34.50 ($US27) each

63mm ID x 90mm Long Velocity Stacks

2 mm spun Aluminium

Dimensions: 63 mm Base ID; 115 mm Bellmouth OD

Designed to improve airflow into the induction system (Carburettor or Fuel Injection System)

Size :

Weight : 0.25

Ishrub · Feb 25, 2018

If I used my Redneck cut down condiment bowls posted here they would be approximately 35mm high if cut at 62mm inner diameter and 95mm at bell mouth.

They are dirt cheap too - just Au$3.50 (2 quid) retail for 4 bowls (compared to Au$131 delivered for the 3x V.Stacks I posted above).

3.75" (95mm) across at bell mouth tapering to 2" (50mm) base and 1+5/8" (42mm) deep.

David Gill custom RHS and LHS Bearclaws

Stainless Steel Mixing Bowl 4pk|Kitchen|Home & Garden|The Reject Shop
Link Removed

Claviger · Feb 25, 2018

I’ve seen those as well, the problem is without seeing the inside, there is no way to know if they’ll leave a lip. At 63mm ID they’d slip over the TB, but what about the wall of the TB. That’s the whole reason I went to printing my own, couldn’t find an off the shelf set that will work.

While he did the testing with flat cut stock, the results would only get more pronounced with a bell mouth, so, it’s a great “worst case” example of induction tuning.

Claviger · Feb 27, 2018

Well new toys arrived

. This is a nylon/carbon blend 50/50 by weight. It is RIGID. 100um print layer thickness is well worth the time to have done. These babies will need no reinforcement and I’m not going to bother sanding them as there is no point, they’re phenomenally smooth already. I honestly haven’t ever seen 3D printed parts like these before.

Even the “barb” rings for the hoses to bite on to are great and strong. $30 a pop from 3Dhubs community print service. Now to get assembly done!

Shiny part was the prototype that I made some small modifications to, it’s a PLA part printed at 200um. Test fit is with non trimmed couplers, the position will alter slightly.