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Making Lobster Back Piping

Proximity Motorsport

By Proximity Motorsport,
in Fabrication

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Daniel R32
Daniel R32

Thought i might as well throw up some lobster backs ive done. Did this 33 with all bends lobster backed, and everything in the engine bay lobster backed.. Even the straight sections were made from lo

scotty nm35
scotty nm35

I back purge all my stainless, the black eruptions on the back are a bitch to grind back so I feel its worth the gas so I don't have to. I haven't used the pulse function much, perhaps I should play

scotty nm35
scotty nm35

I love the freedom lobster piping allows for tight bends and spiral work. Here is a stealth boot mount GT35 in a V8 Soarer I worked on recently.

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Mick_o Grand Master

Mick_o

Posted
Posted

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 :yes:

DSC_0689.jpg

Mick_o Grand Master

Mick_o

Posted
Posted

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

Mick_o Grand Master

Mick_o

Posted
Posted

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 :yes:

damnnnnn Mick, that's top notch welding!

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

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