Borg Warner EFR Series Turbo's V 2.0

[iruvyouskyrine]

You would think that but it's not. It's a parallel thread, and it's not M10x1 because that's what I took a punt on and the thread is about half that size ?

[GTSBoy]

12 minutes ago, iruvyouskyrine said:

You would think that but it's not. It's a parallel thread, and it's not M10x1 because that's what I took a punt on and the thread is about half that size ?

Um.....female pipe threads (BSP, NPT) are always parallel. The taper goes on the male.

[sneakey pete]

Pretty sure its metric, did it over Christmas. Maybe M8? Don't have the reference catalog here but it was pretty much the only option in metric for a -3 male fitting for that thread size.

Edit: well, for an 8374, maybe its different on the smaller ones?

 

I distinctly remember how odd it was that my USA designed turbo had metric threads and the Australian Designed Turbostmart wastegate had imperial threads.

[GTSBoy]

There's not really any such thing as "metric pipe threads". When we're talking about screw in fittings, and elbows and Tees that go onto pipe, etc etc, there is really only 2 dominant threads. BSP and NPT. The Yanks, the oil & gas industry and a few others are stuck on NPT. The rest of the world pretty much uses BSP. The Europeans call BSP threads by other names though. If you see a German company describing a threaded port or stub on their equipment, they will call it G1/2" or G15 (same thing). And there are other variations on the theme.

M8 is a bolt thread specification. It is really not relevant to "plumbing" fittings. People don't use metric bolt thread forms for tapered male into female sealing threads. They may well use metric bolt thread forms on collars of fittings that use seats to seal (like Swagelok or other similar pneumatic or hydraulic fittings) but they are just as likely to be imperial/American or totally custom in those systems, seeing as they are usually proprietary anyway.

[taijohnsen]

[GTSBoy]

Yes, and look at the conical seat on that port. It is clearly meant to work with a bespoke fitting that has that cone on it. Seems silly, when everybody else would just use a 1/8" NPT or BSP parallel in there, with a tapered fitting.

I mean, good on the yanks for doing something, anything, in metric. But dumbo points for using a metric bolt thread for a f**king plumbing fitting.

[taijohnsen]

Conical seat would be for an o-ring I would have thought... Perhaps they thought people might run a banjo fitting.. It's not that big of a deal really...

[GTSBoy]

48 minutes ago, taijohnsen said:

It's not that big of a deal really...

Well, it kinda is. They've used a thread that looks about the same as a 1/8" pipe thread, but isn't. Then you either have to use their fitting or go out of your way to get a fitting that has that thread on it, which has got to be about 100x more difficult than just getting something with a 1/8".

50 minutes ago, taijohnsen said:

Conical seat would be for an o-ring I would have thought.

But then it wouldn't tighten up. You'd be relying on a threadlocking compound to stop the fitting backing out.

[iruvyouskyrine]

no idea about threads etc etc. Thanks @taijohnsen ill go swap my M10x1 to M8x1 ?

[burn4005]

Have a cry about it.. comp cover is soft alloy, comes off with 1 vband and an 1/8 npt tap needs a 8.2mm drilled hole. So will completely clean out the m8 thread.

Not exactly rocket surgery

[burn4005]

3 hours ago, GTSBoy said:

 But then it wouldn't tighten up. You'd be relying on a threadlocking compound to stop the fitting backing out.

Why not? AN fitting ORB threads are parallel and they seem to be fine.

[GTSBoy]

3 minutes ago, burn4005 said:

Why not? AN fitting ORB threads are parallel and they seem to be fine.

Because an o-ring is a cushion that prevents the male fitting from pulling up hard on the external seat of the connection, unless the o-ring is deformed beyond intended design in that conical seat.

That seat is not designed for an o-ring.

AN fittings do not look like that. Parallel threads are of course completely normal on collar type fluid couplings that have conical metal on metal seats. This is not the same situation.

[sneakey pete]

Agree with what you're saying re the fact that metric pipe threads are not a thing, but in the end, it is a M8x1.0 thread. And Speedflow makes a fitting for it so it can't be that rare of a thing: https://www.redlineauto.com.au/p-2547-speedflow-349-04-m8-x-10-to-4-male.aspx

 

For what its worth Iv'e had one in there for a while now, leak tested to 30PSI no issues, doesn't seem to back out at all (steel fitting in aluminium probably helps there). If you're that worried put some sealant on there. 

[Ben C34]

How the actual f**k do brake fittings work!

Here is the short version. True pipe threads seal on the threads. Other applications use a standard thread then use a gasket/copper washer ect.

And then you can also seal on a tapered bit but thats another story.

[GTSBoy]

The end of the brake pipe is flared. That forms the female part of the cone seat. The male part of that is either buried in the bottom of the threaded hole (say on a caliper, MC, prop valve) or in the other fitting, if is just some coupling fitting somewhere partway along a line.

The "nut" that is on the brake line has a male thread that screws into the female thread (on the caliper, etc) and pushes on the back side of the flared end of the pipe, pushing it against the male flare.

So, it is a tapered seal, as per your discarded throwaway line at the end of your post.

Simples, squeak.

Or were you being ironic?

[burn4005]

This is an odd hill to want to die on gtsboy, what makes you think the chamfer on the face of the whole is not intended for an oring?

Here is an ORB cross section for comparison..

Edited July 11, 2020 by burn4005

[GTSBoy]

2 minutes ago, burn4005 said:

what makes you think the chamfer on the face of the whole is not intended for an oring?

Because of the size (width) of the cone vs. the diameter of the thread. It's massively oversized.

[Timmaz300]

Is there any reason to upgrade the factory recirculation valve for a Turbosmart recirculated or 50/50 valve on my 9274?

[taijohnsen]

Not unless it's bleeding boost or compressor stalls on throttle lift off...

My 7136 used to comp stall a lot, and I  don't have a VL commo, so I put the 50/50 kompact shorty on it with a lighter spring.

I'm not using it any more if anyone would like it. It's bronze now, not black tho... 

[Mick_o]

15 hours ago, Timmaz300 said:

Is there any reason to upgrade the factory recirculation valve for a Turbosmart recirculated or 50/50 valve on my 9274?

What are the temperature ratings on the Festo pneumatic hose and fittings?  It looks nice and neat and definitely easy to install. But I'm a bit sceptical it would live long on the hotside there? ?