Making Lobster Back Piping

[Craved]

yeah i use JNT for donuts, cones, bellmouths also

[scotty nm35]

I just can't justify spending $25 per 90 degree mandrel bend when I can cut 4 or 5 pieces and weld them in a few minutes, its also harder for me to work with bends as I need to revert to the angle grinder.

[samstain]

If your doing for fun and enjoy welding then yeah lobster might work out a bit cheaper, but if your a shop and you need to be chargning out +$80/hour just to pay for the gas/consumables rent etc -ie stay in business - then a donut or bend is going to work out a lot cheaper, it is also going to be far more consistent and less risk of leaking, leaving a dag inside etc.

[ISL33P]

ahhh the joys of working from home....no need for rent!!!!! and the reason why i dont charge an absolute fortune like a lot of others other there

[mr 32]

if only i could find prices like that for Stainless steel donuts and bends

[samstain]

try suppliers to the chemical industry - wineries etc - for stailness bends, from memory they were a similar price. Good exhaust shops can also bend stainless tube if they have a proper bender.

[NXTIME]

Norm, try Midway Metals:

SYDNEY Address

24-28 Lockwood Road

Erskine Park NSW 2759

Phone (+61) 2 9670 8900

Fax (+61) 2 9834 2441

E-mail [email protected]

[mr 32]

thanks Charlie

[32_Dave]

here is my first ever attempt.

[32_Dave]

after tacking together.

[scotty nm35]

I was wondering if you were going to weld them.

I usually mark the pieces with a permanent marker then tack, how did the tape work out?

Are you going to back purge the pipe? You can just cover the ends with aluminium foil and squirt some gas in there occasionally but I prefer a constant stream.

[waxracing]

I use tape as well. I build the pipe with tape then get a single sided razor blade cut out a small section and tack it

The you can take off all the tape and it stays in shape

[32_Dave]

tape worked out really well. i took it all off, cleaned each piece up then rebuild the section with tape leaving a small gap to get the mig in there. i wont be welding them up as i dont have the equipment.

[khoala]

for the backyarders, how do you go about cutting up the metal and getting/measuring the exact degree increments for each cut? using an angle grinder would be a pain in the ass, so do you use a metal cutting drop saw?

[32_Dave]

for the backyarders, how do you go about cutting up the metal and getting/measuring the exact degree increments for each cut? using an angle grinder would be a pain in the ass, so do you use a metal cutting drop saw?

angle grinder with 1mm disk, that what i used, can get pretty damn accurate. it's all about making it easy / cheating. i use a program on the computer thats designed for making cones from sheet metal, and you can then print out the template, trace it, cut, rotate, trace and cut. then cleanup the cuts with a file. a drop saw is on my purchase list:P

[scotty nm35]

If you can grab an old brobo cold cut saw cheap enough it would be the best option, perfect cuts every time. I paid $500, worth every cent.

Made some straight pipes for a mate today.

[30three]

Those straight pipes are sick man. Do want

[Craved]

If you can grab an old brobo cold cut saw cheap enough it would be the best option, perfect cuts every time. I paid $500, worth every cent.

Made some straight pipes for a mate today.

nice collector - what angle did you use for it?

[scotty nm35]

Not sure what angle but 120mm is the longest I can fit in the saw vice, cut lengthways if you understand. Comes up a treat with a razor edge inside, similar to the y pipes I make.

[zebra]

Scotty, can you make dumps for a 1J?

I guess you would need the car though yeah?