Making Lobster Back Piping

[Dan_J]

tips would be to buy a drop saw that can do angles, so much more better the with an angle grinder as i saw in the above posts

[scotty nm35]

A cold cut saw (brobo) works best, second is a horizontal bandsaw. With a friction blade you will be cleaning up a grand old mess on every wedge.

[zebra]

but how many people have 7k for a brobo? lol

[scotty nm35]

7k? wtf?

Mine cost $500.

[zebra]

7k new lol

[Mick_o]

As promised heres the little fiddly ass intake pipe I made for my evo 9

All tacked up with a purge plug up her butt

[Mick_o]

test fit

[Mick_o]

Here she is welded up

[Mick_o]

Some close ups of my welding

[Mick_o]

Here it is with the blow off valve plumb back and breather lines welded in

[Mick_o]

All cleaned up ready for install

[Mick_o]

This was my 1st attempt ever under the bonnet of my 33

this was a combination of mandrel bends and lobster back as I ran out of bends and done it in a Sunday lol

[Mick_o]

Installed

[Mick_o]

Heres inside the tube I back purge all my pipe work so there is no dags inside the pipe and when you get full penetration like above the welds are ALOT stronger.

I have had my Stainless tube work pressure tested at over 20bar without issue

[gumflapper]

nice

[r34unit]

Some close ups of my welding

NICE WORK !!!!!!

are they all fused welded ?

how many amps ?

what setting did you for you purging ?

how did you clean it up ? with pickling paste ?

keep up the good work

[Mick_o]

Thanks yes they are all just fused no filler wire mate. I weld fairly hot but I move fast as I walk the ceramic (a welding technique) I weld tube at about 55 amps but if you are still learning id suggest around 40-45 amps depending on your welder as some are hotter than others. For welding tube id suggest getting a gas lense as it gives better gas coverage over your arc. No fancy settings just set the right amps (machine pending) I set my ramp up fairly cold at bout 20amp base temp at 50-55amp and I set my ramp down to about 3.5 seconds and my post purge to bout 5 seconds. If you look at pic above you can see where I start to ramp down the amps and continue weaving up the tube. Notice the colour change towards the end where I let the post purge cool down end of the run (the bluey colour)

When I purge I run about 5-7 lpm through the tube with basically a hole I stab with my filler wire.

Yes I used pickling paste to clean the welds but just polish it by hand with green scotchbrite pads

[Dose Pipe Sutututu]

damnnnnn Mick, that's top notch welding!

Hope you're up for some welding and payment by slabs of beer & cash lol

[Mick_o]

HAHA thanks Johnny well it is what I do for a living so id hope id be good at it lol!

To that I answer is the pope a catholic? Cash and beer are both very important parts of my life

damnnnnn Mick, that's top notch welding!

Hope you're up for some welding and payment by slabs of beer & cash lol

[Dose Pipe Sutututu]

I'll be sure to ping you when the time comes for my silly mods