CNC Billet Injector Bosses and Manifold
Turbo Mini Forums

BTW, how come you're down to two injectors.....

I thought the original plan was three to get symettry with staged injection ???

(first picture at beginning of thread),

Schrödinger's cat - so which one am I ???

I've gone down to 2 injectors because that's all I need and it is simpler to make - much simpler. You can now get 1000cc/min injectors that will fit which will do well over 200hp. I'll be using 600cc/min for up to 150hp on the 998.

I used 3 in the original because at that time the biggest pencil injectors were 800cc/min and I was looking for some headroom.

As for symetry, I don't think that offsetting the injector by 10mm from the centreline of the port will have much affect at idle and cruise, given the distance from the injector to the valve. It will be symetrical under boost with all four firing.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

If you are going to be gluing stuff together you might consider plastic rather than aluminium. I've used acetal machined for inlets before. Chemical and temp resistant, dimensionally stable and a piece of piss to machine. Comes in lots of shapes and sizes. Glues together with superglue and a primer. Cheap too from directplasticsonline.co.uk. I made little manifolds for my quad with it..

google DIY bead tool and you will find some very handy ideas to make your own.
like out of a vise grip, a muffler clamp and a woodruf key. or if you want something with rollers you could fit the rollers, bought or home made, to your vise.
nothing for high volume production, but if you only need some made

I thought about using plastic, particularly the use of 3D printing. BUT the inlet has to share a mounting stud with a near red hot turbo manifold. I'm not aware of a plastic that will cope with the conditions.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

Perhaps a metal flange and plastic glued after it for the compicated bit.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

or something like this
http://forums.turbobricks.com/showthread.php?t=58790
think you would need something to turn the pipe, like a strap wrench

It was 1.6mm wall and a 2.4mm tungsten I recall. It was before I really got the hang of welding ally though. I could try again.

Edited by Paul S on 21st Nov, 2012.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

Schrödinger's cat - so which one am I ???

I used these rods to perform the alterations to my std metro plenum, solid and spot on looking joints but they were not all air tight when pressure tested, it bubbled out from under the edges of the 'weld', they were minor so the tiny loss of air pressure under boost never bothered me, car had may more larger shortcomings! Anyhow loving the engineering involved here.

On 5th Oct, 2014 Shauna said:
What that's crazy, you go commando hahaha! How heavy is your helmet ?

Yes i moved to the darkside

Instagram @jdm_brett

Edited by Sprocket on 22nd Nov, 2012.

the hole in the base of a can is easy try sticking 2 parts together where the join is round a corner and you will see what i mean, the stuff when molten runs like water and so easily settles in the bottom of the can base



that is airtight and works a treat

Edited by Brett on 22nd Nov, 2012.

Yes i moved to the darkside

Instagram @jdm_brett

what about the round pipe with its convex surface that would surely see the solder run off?

as with any soldering, applying the heat to the solder will always end in a mess. the trick is to heat the base metal and melt the filler rod onto it. Heat the part, not the rod

Like water, the hotter the solder, the thinner it becomes so controlling the temperature of the materials is key, but. That's the tricky bit wich takes some practice.

meh not arguing, i dont like it and think its crap for fabricating, never said i couldnt use it

Yes i moved to the darkside

Instagram @jdm_brett

I got the impression that it was a bit like old plumbers solder, if you controlled the heat you could keep it in a buttery state.

I'm still waiting for my crate of bananas :(

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

Schrödinger's cat - so which one am I ???

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

No, just bananas:)

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

Well I agree brett, I have done more than my fair share of soft soldering, brazing, silver soldering and gas welding which I have always had a prefference for! The older plumbing solders reel or stick were at least 60 per cent lead which gave that window of butteriness at the right temp, body solder for lead loading even more so, this stuff they towt as a brazed joint in alloy and behaves nowt like soldert the key seems to be keeping the heat low just around the melting point of the rod and in the workpiece but rubbing the end of the rod into the surface to get it to adhere, they claim its needed to break the oxide layer formed, I found the same it behaves nothing like solder and if you try to treat it as such it will bead off out of the pool. I have been through 4 of the large tubes on various things and I don't rate it for fabrication, but its great for filling in type repairs such as corrosion dips and lumps out of alloy casings

[quote=Brett,22nd Nov, 2012]meh not arguing, i dont like it and think its crap for fabricating, never said i couldnt use it[/quote

On 5th Oct, 2014 Shauna said:
What that's crazy, you go commando hahaha! How heavy is your helmet ?

My special US bananas are stuck in customs :(

So these will have to do :)

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."