Big jim / bms downpipes

[Fordy]

can anyone tell me if the bottom 2 bolt flange that mates to the exhaust front pipe turns on the exhaust pipe or has been welded in position?

[GTphil]

I have a bms pipe and it turns;)

[paul b]

BMS , mine turns, as I had it in my grubby hands today refitting it, :)

[Fordy]

Damn, okay does anyone have any pictures of that end of the downpipe, So I can see how the flange has been made.

I'm making a prototype 2.5inch turbo downpipe and would like to make it near enough the same style otherwise I'll have to make it using a genuine support bracket and hope there's no fitment issues

[SCHWARTZ]

http://i773.photobucket.com/albums/yy12/schwartz87/IMAG0267_zpsd37db087.jpg

[Fordy]

Oh now I see how they did it!
Any chance you could try and measure what angle that chamfer is? An how thick overall it is so I can get some machined up :)

Thanks for the help chaps I'll make a project thread soon when I got all the bits to build on with turn up this week

[SCHWARTZ]

If you had the circular section with schamfer facing up the schamfer is about 6mm at 45odd degrees. The whole thing is 15mm tall and 10mm thick (id-od) if that makes sense.

[Fordy]

That's great! Cheers buddy hopefully they won't cost much to get made up, or even be able to buy ready made

[Fordy]

Another question mate from the bottom how far up does the chamfer start?

[Fordy]

Another question mate from the bottom how far up does the chamfer start?

[SCHWARTZ]

The schamfer its self is roughly 8mm the non schamfered part is 7mm. The shamfer goes to nothing so there is no flat top at the end

[SCHWARTZ]

http://i773.photobucket.com/albums/yy12/schwartz87/IMAG0268_zps3e81fd34.jpg

[Fordy]

You sure are a legend!

I'm guessing if Id to od the whole ring must have a outside diameter of 73-73.50mm wide?


Does anyone know if these solid donut rings are easy to buy or custom made only?

[SCHWARTZ]

Roughly 76mm od 60mm I'd.

[SCHWARTZ]

I know the measurements don't quite work out but they are just with a tape measure. Just to add the exhaust dosnt slide inside the flange they butt up together.

[Fordy]

More than enough info mate.
I'll probably make prototype 1 with a fixed flange and prototype 2 with a bms style flange, as getting the stainless bar in a length small enough then lathed down to make a flange will take a fair while.

I'm checking prices and sources across a few to get the materials cost down :agree: