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Registered Member #687
Joined: Mon May 07 2007, 02:21AM
Location:
Posts: 14
All,
Below is a link to an auto exhaust supply shop that claims they sell "exhaust pipe donuts" for use by people fabricating custom exhaust for cars. Has anyone researched this as a possible toroid source?
The "donut" sizes they sell might be good for small, medium size coils. The material they list is 16GA steel, and stainless steel. I don't see why they couldn't do aluminum.
Registered Member #477
Joined: Tue Jun 20 2006, 11:51PM
Location: Seattle, WA
Posts: 546
Prices seem a little steep, though. John Freau charges ~$110 for a 4x13" toroid. Here you'd be paying that much for a 3x9". Smaller ones would make great corona rings, but you're probably better off bending copper tubing by hand for that.
Registered Member #15
Joined: Thu Feb 02 2006, 01:11PM
Location:
Posts: 3068
Prices are a bit high. You can get much larger and less expensive toroids from John Freau or Information Unlimited as well. Plus with these toroids (exhaust supply), you still need to worry about mounting provisions.
Registered Member #135
Joined: Sat Feb 11 2006, 12:06AM
Location: Anywhere is fine
Posts: 1735
I'm just going to throw Ross Engineering up here as well so you have another source for stuff. They have pretty much everything, although I dunno about prices. I think we were quoted $280 for the toroids I was looking for, common size.
Registered Member #477
Joined: Tue Jun 20 2006, 11:51PM
Location: Seattle, WA
Posts: 546
I bought my 6x24" toroid (which I subsequently cut up...more on that later ) from D.C. Cox (who orders them from O.W. Landergren) for something like $200. Don't know about Ross Engineering, but the John Freau and Information Unlimited ones have seams. The O.W.L. ones are seamless. Very nice. D.C. regularly makes bulk orders of toroids and resells them. Highly recommended!
Registered Member #687
Joined: Mon May 07 2007, 02:21AM
Location:
Posts: 14
Thank you for repairing the link. I am still trying to get the hang of this.
As for the donuts. Agreed, they are somewhat pricey, but they got me thinking of the exhaust shops here in town. I am curious if one of those shops would be able to make something similar for a few dollars. I have purchased small lengths of pipe from them for a few dollars before, and I doubt they would charge much to bend a piece for me. I can weld so, a little fab work doesn't concern me if i can get a cheap toroid out of it.
Also, I found another link, they have donuts for 5" diesel exhaust:
Registered Member #205
Joined: Sat Feb 18 2006, 11:59AM
Location: Skørping, Denmark
Posts: 741
Mark Finnis, downuner, was my big idol when I sterted coiling some 10 years ago. He used exhaust toroids: He also made his own transformer: Which gave me the courage to do so too:
Mark is selling his stuff: This triputo to him since he is out of the hobby now.
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Possible Toroid Source
) from D.C. Cox (who orders them from O.W. Landergren) for something like $200. Don't know about Ross Engineering, but the John Freau and Information Unlimited ones have seams. The O.W.L. ones are seamless. Very nice. D.C. regularly makes bulk orders of toroids and resells them. Highly recommended!
