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Mike Beck
Goo Roo
New Zealand
E36 Coupe

Posts: 4665
Reg: 11-2005

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Tuesday, June 08, 2010 - 05:54 am, by:  Mike Beck (Gold_40gt) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

So, I'm looking at getting some headers made up for my project in the comming months, but I was talking to an engineer and he was saying how going stainless is not always a good idea because they can be prone to cracking.

Kinda draws back to an M3 Midd section I bought had about 6 cracks through it that had to be welded up.

Are there any grades of stainless steel that dont crack or suffer this problem?

He also said that over time stainless steel doesnt like the heat and it can cause it to rust?

I've heard Titanium is ideal but like I want to spend that sort of money...

Any material suggestions would be appreciated. Obviously mild steel is an option but I dont like the rust factor of those...
Matthew Sharpe
Goo Roo
North Island
JZZ31

Posts: 5578
Reg: 10-2005

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Tuesday, June 08, 2010 - 06:44 am, by:  Matthew Sharpe (Madmatt) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Maybe look into what HT coatings are available for mild steel? Probably loads of cool technology out there to solve the rust problem.
Peter Nitschke
Junk Filterer
South Australia
UZZ30 UZZ31

Posts: 11636
Reg: 11-2004

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Tuesday, June 08, 2010 - 01:28 pm, by:  Peter Nitschke (Pen) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Mike, how much moisture do you expect to be sitting around in your headers?
Mike Beck
Goo Roo
New Zealand
E36 Coupe

Posts: 4668
Reg: 11-2005

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Tuesday, June 08, 2010 - 02:30 pm, by:  Mike Beck (Gold_40gt) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)


Peter Nitschke wrote on Tuesday, June 08, 2010 - 01:28 pm:

Mike, how much moisture do you expect to be sitting around in your headers?




Well the cars going to be used now and then during the weekend, it will be parked up most of the time.

So I guess there will be more moisture that way.
Peter Nitschke
Junk Filterer
South Australia
UZZ30 UZZ31

Posts: 11638
Reg: 11-2004

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Tuesday, June 08, 2010 - 11:25 pm, by:  Peter Nitschke (Pen) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

It's unlikely to collect in the headers though. If there is any condensation, it will run down and collect eg in the cats - if you have any.

Rust is more of a problem where moisture pools, so mufflers etc should be stainless, but the rest is less critical. Consider too, how long does it need to last?

Is there any chance you will keep this car more than 12 months?
Mike Beck
Goo Roo
New Zealand
E36 Coupe

Posts: 4672
Reg: 11-2005

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Wednesday, June 09, 2010 - 05:20 am, by:  Mike Beck (Gold_40gt) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)


Peter Nitschke wrote on Tuesday, June 08, 2010 - 11:25 pm:

It's unlikely to collect in the headers though. If there is any condensation, it will run down and collect eg in the cats - if you have any.




Hmm yes I will be ruining a pair of these Magnaflow 2.5" Cats up front near the tranny.


Peter Nitschke wrote on Tuesday, June 08, 2010 - 11:25 pm:

so mufflers etc should be stainless,




The rear mufflers will be stainless Audi ones, so thats sorted.

Yeah I will be keeping this for a while, so it will need to done to a good standard, otherwise I wouldn't really care.
Mark Donovan
DieHard
Auckland
V8 Limited

Posts: 541
Reg: 07-2005

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Saturday, June 12, 2010 - 05:56 pm, by:  Mark Donovan (Mark_donovan) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)


Mike Beck wrote on Wednesday, June 09, 2010 - 05:20 am:

Yeah I will be keeping this for a while, so it will need to done to a good standard, otherwise I wouldn't really care.




Would those sentiments apply to any of your previous cars..?
Mike Beck
Goo Roo
New Zealand
E36 Coupe

Posts: 4676
Reg: 11-2005

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Saturday, June 12, 2010 - 11:19 pm, by:  Mike Beck (Gold_40gt) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)


Mark Donovan wrote on Saturday, June 12, 2010 - 05:56 pm:


Would those sentiments apply to any of your previous cars..?




Not really. I was never happy with a Soarer, this car at least fills the gaps a soarer didn't fill. Already had it 6 months.
Aiden Cheese
DieHard
QLD
Soarer jzz30

Posts: 534
Reg: 09-2009

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Sunday, June 13, 2010 - 03:01 pm, by:  Aiden Cheese (Chillpen) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

What's wrong with buttweld or "steampipe" as tuners call it?
Dan McColl
Goo Roo
Victoria (The Nazi State)
Active V8 and the Beast.

Posts: 2641
Reg: 07-2005

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Sunday, June 13, 2010 - 06:14 pm, by:  Dan McColl (Hoon) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Not pretty/shiny enough for mike.
Mike Beck
Goo Roo
New Zealand
E36 Coupe

Posts: 4678
Reg: 11-2005

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Sunday, June 13, 2010 - 06:34 pm, by:  Mike Beck (Gold_40gt) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)


Dan McColl wrote on Sunday, June 13, 2010 - 06:14 pm:

Not pretty/shiny enough for mike.




Exactly.

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