DIY injection stacks?

[Jantrix]

I need 10 for a current project. I'm not going to pony up $20+ for two sets of aluminum ones. I'd prefer to make them if I can. I'd like to hear any methods you've come up with the properly flare the ends of either styrene or aluminum tube. Thanks.

Edited September 6, 2019 by Jantrix

[Matt Bacon]

Search on eBay for “uninsulated bootlace ferrules.” They come in all sizes, and I bought a set of 100 each in 6 different sizes for about £5. They’ll keep me in velocity stacks and exhausts for years...

best,

M.

[Casey]

 

 

[Jantrix]

Thank you both. Incredibly helpful.

[Can-Con]

Ron, Just round off one end of a regular metal axle, put it about 1/4 inch in the end of your aluminum and start working it around in circles, pushing the end of the aluminum out a little bit as you go around.

Start with small circles and slowly increase the angle while slowly allowing the axle to come out a tiny bit each time.  Eventually, the end of the aluminum will be flared out . Work slowly so it dosen't bend too much at once or rip the tube when it starts to get thinner as it flares out.

You can then polish the tube with a bit of your favorite polish and cut to length.

That's how I did these ones.

Edited September 6, 2019 by Can-Con

[Greg Myers]

On 9/6/2019 at 6:57 AM, Casey said:

 

 

Nice thread. Last entry 2013 all of the listed sources sites are dead.

[Ace-Garageguy]

4 hours ago, Greg Myers said:

... all of the listed sources sites are dead.

Wrong. This one's still good. And it takes some effort on the part of the buyer to determine exactly what size to buy.

https://www.alliedelec.com/product/altech-corp/2222-0-100/70078419/

Edited September 16, 2019 by Ace-Garageguy

[Jantrix]

11 hours ago, Ace-Garageguy said:

 And it takes some effort on the part of the buyer to determine exactly what size to buy.

Yes it does. I measured the diameters of some plastic ones I had both at the base and at the flare to determine the size I needed.  I did purchase some. I believe I got 12 and 14 gauge. After the intake is mocked up for the V10, I'll post up some photos in this thread. Most any website you look at for these SHOULD post up a data sheet for the part. By comparing your measurements to the data sheet specs on the parts, should help you determine what part you need. I recommend a digital micrometer. Thanks again for the advice, gentlemen.

[Ace-Garageguy]

2 hours ago, Jantrix said:

Yes it does. I measured the diameters of some plastic ones I had both at the base and at the flare to determine the size I needed.  I did purchase some. I believe I got 12 and 14 gauge. After the intake is mocked up for the V10, I'll post up some photos in this thread. Most any website you look at for these SHOULD post up a data sheet for the part. By comparing your measurements to the data sheet specs on the parts, should help you determine what part you need. I recommend a digital micrometer. Thanks again for the advice, gentlemen.

And thank YOU sir, for posting additional relevant specific data. Very helpful to have it right here.

[Snake45]

The problem with scale injector tubes is getting the right diameter. As I understand it, the real tubes were 2” in diameter. This reduces to .080” in 1/25, an odd size. 1/8” tubing is way too big as it scales to 3.125; 3/32” scales to 2.343” (the closest) and 1/16 scales to 1.562 (too small).

The shoe eyelet chart shows .07 and .09 diameters—sadly, no .08. The .07 scales to 1.75”, while the .09 scales to 2.25” (although 2.16” in 1/24, which might look okay on some 1/24 engines).

Evergreen makes lovely .080” styrene rod, but of course you have to hollow it out yourself, which is no fun.

[Ace-Garageguy]

30 minutes ago, Snake45 said:

The problem with scale injector tubes is getting the right diameter. As I understand it, the real tubes were 2” in diameter...

Not all of 'em. And considering so many guys will run plug wires the scale size of garden hose... 

[Bainford]

33 minutes ago, Snake45 said:

The problem with scale injector tubes is getting the right diameter. As I understand it, the real tubes were 2” in diameter. This reduces to .080” in 1/25, an odd size.

Actually, .080" equals 2.0 mm, a size in which aluminium tubing is indeed readily available through hobby sources. K&S sells it.

[Ace-Garageguy]

3 minutes ago, Bainford said:

Actually, .080" equals 2.0 mm, a size in which aluminium tubing is indeed readily available through hobby sources. K&S sells it.

Exactly. It's fairly easy to bellmouth the tips, and cutting to final length after forming is definitely recommended. 

[Snake45]

48 minutes ago, Ace-Garageguy said:

And considering so many guys will run plug wires the scale size of garden hose... 

Two wrongs don't make a right. They just make two wrongs. 

[Snake45]

46 minutes ago, Bainford said:

Actually, .080" equals 2.0 mm, a size in which aluminium tubing is indeed readily available through hobby sources. K&S sells it.

I have NEVER seen 2mm K&S tubing in any retail establishment in 50 years, but a check of their website shows they do in fact offer it. I'll need to check into finding an online source, and then order a bunch of it. Thanks! 

[Jantrix]

Using the data above. I purchased the 12 and 14 AWG ferules. I was able to accomplish this. These are the 14 AWG pieces. I'm pretty happy with them. 

I realize this intake I've created, likely has no basis in reality and/or isn't mechnically possible. This model is a slump buster and my usual requirement of mechanically "plausible" has been put on the shelf next to my empty bucket of free time. Besides this is the fourth attempt at something decent looking. Again, thanks very much for the assist gentlemen. I hope this has helped/will help someone else.

BTW - the two bags of 100 pieces was less than the six bucks it took to ship. $12.25 total.

 

 

Edited September 24, 2019 by Jantrix

[NOBLNG]

There are already a few threads on this topic, so I will just add to this latest one. I made these just for the look and am not worried about real world performance.? The main thing I did different than described previously by Steve is to use a bent axle shaft to flare the 3/32” aluminum tube. It is important to de-burr the tubing inside and out before flaring to reduce the possibility of stress cracking as the aluminum  stretches. Just chuck the tube in a drill and push the axle shaft in while turning….nice consistent angle achieved this way.? I used a set of calipers set to 0.13” as a gage for the O.D. of the flare. Any oversized ones are easily filed back down to size.

 

 

Edited June 24, 2024 by NOBLNG

[deuces wild]

Awesome!!!!!.....??