CHRA/turbine bolts relaxing.
Electrical Discharge Machining. You use a tinyass wire to burn your way thru metal. Simple way to put tiny holes in hard metals that would otherwise be impossible to drill with tradtional machines. Like you can do .020 holes thru fully heat treated things and really deep holes, etc.
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My progression:
Really, thanks to everyone for their input. I never thought that by the time I was 30 (1-more day) that I'd have a car like this with such respectable engineering.
- standard bolt: failed, broken turbine
- Nimonic bolts: failed so bad they fell out in one session, almost damaged the turbine
- stardard bolt, SS wire: failed and stretched wire, almost damaged the turbine
- standard bolt, inconel wire: failed after 4-6 days, failed safe, drove the last session and 5-hours home without damage
- tial provides inconel bolt with no holes for wire: called TiAL, claimed they did't read my instruction and don't have equipment to drill inconel. I'm not pleased of the lack of support. If I could go back in time and buy Turbosmart parts with a 4-bolt flange and inconel bolts I would
Really, thanks to everyone for their input. I never thought that by the time I was 30 (1-more day) that I'd have a car like this with such respectable engineering.
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Thread Starter
Joined: Jun 2006
Posts: 29,085
Total Cats: 375
From: Republic of Dallas
Thanks for the link to the wire.
What is an EDM shop (Electrical Discharge Machining)? I'm looking around locally for a machine shop that can drill them. I'm not in this type of industry at all, so I'm not exactly sure which shop can or cannot handle them...even if they say they can.
Were those regular SS bolts that you had come loose, hustler?
What is an EDM shop (Electrical Discharge Machining)? I'm looking around locally for a machine shop that can drill them. I'm not in this type of industry at all, so I'm not exactly sure which shop can or cannot handle them...even if they say they can.
Were those regular SS bolts that you had come loose, hustler?
Regular SS and UNWIRED Nimonic.
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Not having any luck finding a shop here yet. Where do you guys order your regular M6 hardware from? I can't find anything on ATP turbo. Do you source them at local fasterner companies? I'm going to do the standard bolts and inconel wire until I can get the inconel bolts drilled.
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Thread Starter
Joined: Jun 2006
Posts: 29,085
Total Cats: 375
From: Republic of Dallas
Not having any luck finding a shop here yet. Where do you guys order your regular M6 hardware from? I can't find anything on ATP turbo. Do you source them at local fasterner companies? I'm going to do the standard bolts and inconel wire until I can get the inconel bolts drilled.
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I twist more than most recommend, to snug the wire up to the outer edge of the bolt head, count the # of twists for future reference, run through the next bolt, then twist to 8-10 twists per inch to increase tension.
Wire tight, break a few to find the limit. You're working with inconel and everything you read on the interweb is about wiring soft SS in light duty applications.
Wire tight, break a few to find the limit. You're working with inconel and everything you read on the interweb is about wiring soft SS in light duty applications.
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Thread Starter
Joined: Jun 2006
Posts: 29,085
Total Cats: 375
From: Republic of Dallas
Using the twisting to tension is kind of a waste of wire. I safety wired every one of the hat/rotor combos that went out with our BBK, so by the 12th rotor (48th pair of bolts) I had learned a few things about proper technique. Specifically, what angle to twist the wire at (in relation to the angle it will be used at). You can twist the wire at 1 angle, and then give it a final swooping twist that will fully tension the wire - to the point where I can get the long end of the wire to contour to the edges of the bolt head. Maybe I'll take a video of the next one I do.
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You can see on the hole at the 10 o'clock position doesn't go all the way through, but the rest do. Garrett GT28/2560R .64 housing. The 8 o'clock position hole is partly blocked with casting flash.
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Thread Starter
Joined: Jun 2006
Posts: 29,085
Total Cats: 375
From: Republic of Dallas
Bolts are back, and could not be drilled on a mill. The other EDM shops all told me they would drill them on the mill, with carbide bits!!! I told them we already tried this and the refused to use EDM.
Now they are going to EDM of Garland because they had a reaction I liked where he immediately said he'd EDM wire drill them.
Now they are going to EDM of Garland because they had a reaction I liked where he immediately said he'd EDM wire drill them.
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Bolts are back, and could not be drilled on a mill. The other EDM shops all told me they would drill them on the mill, with carbide bits!!! I told them we already tried this and the refused to use EDM.
Now they are going to EDM of Garland because they had a reaction I liked where he immediately said he'd EDM wire drill them.
Now they are going to EDM of Garland because they had a reaction I liked where he immediately said he'd EDM wire drill them.
I am doing them for my current & previous customers for $40, anyone else for $80, plus shipping. one ø.062 hole across the flats in each bolt.
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Thread Starter
Joined: Jun 2006
Posts: 29,085
Total Cats: 375
From: Republic of Dallas
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I'm not talking to you. You are too silly in the head.
Ok.
I'll need your bolts. If you want brandy new ones those used to be $80 too. The old kit that included the stainless hardware and the 3 straps was like $30...there a good chance if I order the $30 kit part number now it will come with the expensive bolts. Tial is silly like that.
EDIT: not sure how different drilling "used" bolts will be but if it's different, price will be different. Sorry :(
Depends on the beer. Summer's coming up and I drink plenty of corona light. And I didn't have good luck with the one carbide drill I tried...basically exploded on contact. cha-ching! haha.
I'll need your bolts. If you want brandy new ones those used to be $80 too. The old kit that included the stainless hardware and the 3 straps was like $30...there a good chance if I order the $30 kit part number now it will come with the expensive bolts. Tial is silly like that.
EDIT: not sure how different drilling "used" bolts will be but if it's different, price will be different. Sorry :(
Depends on the beer. Summer's coming up and I drink plenty of corona light. And I didn't have good luck with the one carbide drill I tried...basically exploded on contact. cha-ching! haha.
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