Aluminised mild steel exhaust system or stainless

Submitted: Tuesday, Jan 08, 2008 at 10:26
ThreadID: 53241 Views:8832 Replies:7 FollowUps:7
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Is it worth paying $600 more for stainless? any fors or against either?

Cheers
Jack
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Reply By: Member - Olcoolone (S.A) - Tuesday, Jan 08, 2008 at 11:07

Tuesday, Jan 08, 2008 at 11:07
No unless you want to use it as braging rights.

Stainless lasts alot longer the mild steel but stainless can crack around welds unless treated.

Unless you are going to keep you vehicle for 20 years or you use it in corrosive enviroments you would be better off saving your money and use it on something you can use.

I can't remember the last time I replaced and exhaust system because it rusted out.

Look at all the secondhand vehicles that are 10 years old and still has the original factory system.

Regards Richard
AnswerID: 280438

Follow Up By: Member - Bushpig - Tuesday, Jan 08, 2008 at 14:43

Tuesday, Jan 08, 2008 at 14:43
Thanks Richard

I'll stick with mild steel and use the difference to but one of these http://www.tdc-technologies.com/

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Reply By: Member - Olcoolone (S.A) - Tuesday, Jan 08, 2008 at 11:09

Tuesday, Jan 08, 2008 at 11:09
No unless you want to use it as braging rights.

Stainless lasts alot longer the mild steel but stainless can crack around welds unless treated.

Unless you are going to keep you vehicle for 20 years or you use it in corrosive enviroments you would be better off saving your money and use it on something you can use.

I can't remember the last time I replaced and exhaust system because it rusted out.

Look at all the secondhand vehicles that are 10 years old and still has the original factory system.

Regards Richard
AnswerID: 280440

Reply By: ben_gv3 - Tuesday, Jan 08, 2008 at 13:52

Tuesday, Jan 08, 2008 at 13:52
I know a guy who installed a POLISHED stainless steel exhaust on his suby. WTF??????? Who wants a polished exhaust on a car especially when you can't even see it.

Mild Steel is the go.

I don't even think Mandrel Bends are worth it since there are so many bends anyway that create a lot more turbulence. Look at the Troppy, it has 2 x 90 degree bends plus several other lesser bends so I doubt mandrel bends will help very much. It would be better to re-route the exhaust so it is more straight through.
AnswerID: 280467

Follow Up By: Member - JohnR (Vic)&Kath - Tuesday, Jan 08, 2008 at 16:26

Tuesday, Jan 08, 2008 at 16:26
"I don't even think Mandrel Bends are worth it since there are so many bends anyway that create a lot more turbulence. Look at the Troppy, it has 2 x 90 degree bends plus several other lesser bends so I doubt mandrel bends will help very much. It would be better to re-route the exhaust so it is more straight through."

The mandrel bends and the larger exhaust you do at the same time can make one heck of a difference. 16% 0-100kph improvement after fitting mine on a GU. That may settle your douts. Make a more tractable outfit all around.
Cheers,
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John

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Follow Up By: Pajman Pete (SA) - Tuesday, Jan 08, 2008 at 18:00

Tuesday, Jan 08, 2008 at 18:00
"Who wants a polished exhaust on a car especially when you can't even see it."

Depends which way up the car is ...


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Reply By: Kiwi & "Mahindra" - Tuesday, Jan 08, 2008 at 15:45

Tuesday, Jan 08, 2008 at 15:45
We got the local exhaust bloke to make up a roof rack using exhaust pipe...same as the rear roll bar / sports bar...that supports it.....total cost us $400 give or take a few....

went to someone else to give us a quote in stainless steel and it was gonna be a massive amount....a minimum of about $1500.....

so is it worth it? bloody loaf it is!!

reason why?

Its light - I can lift the roof rack - 2.6m x 1.3m so it no mean feat at the sound of it....

Its strong - self explaintary....

but it depends, what ya thinking it for?????

Laura
AnswerID: 280475

Follow Up By: ben_gv3 - Tuesday, Jan 08, 2008 at 17:33

Tuesday, Jan 08, 2008 at 17:33
"but it depends, what ya thinking it for?????"

By the title, I would say for an exhaust...
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Reply By: ben_gv3 - Tuesday, Jan 08, 2008 at 17:31

Tuesday, Jan 08, 2008 at 17:31
JohnR,

Your gains would've been mainly due to the larger diameter pipe you used.

I still have doubts to Mandrel Bends and their value for money considering the several bends inherent in exhaust design creating turbulence.
AnswerID: 280486

Follow Up By: Member - Olcoolone (S.A) - Tuesday, Jan 08, 2008 at 19:04

Tuesday, Jan 08, 2008 at 19:04
Mandrel bend increase power in high performance engines about 3to 5% in the higher RPM range.

A non mandral bent exhaust can work to you benifit by increasing low down talk.

The best type of exhaust is a tuned lenght system to take advantage of the engines sweet spot.

On our race car we had alot of problems trying to tell the exhaust fitter we only wanted a 2.5 inch dia exhaust not a 3 to 4 inch exhaust as most people with turbo cars want .

A 3 inch exhaust can flow over 500hp.

Regards Richard


Regards Richard
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Follow Up By: ben_gv3 - Wednesday, Jan 09, 2008 at 09:11

Wednesday, Jan 09, 2008 at 09:11
Thanks Richard,

So in a N/A or even turboed 4WD, a mandrel bend gives possibly 1% improvement (which is SFA for the extra $$$) at the top end, but since 4WDs need low down torque, then mandrel bends are actually detremental????
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Follow Up By: Member - Bushpig - Wednesday, Jan 09, 2008 at 10:36

Wednesday, Jan 09, 2008 at 10:36
Now I am confused. I'll stick with the standardl and will NOT be getting one of these http://www.tdc-technologies.com/

see newhilux.net

Cheers
jack
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Reply By: Member - Jeff H (QLD) - Wednesday, Jan 09, 2008 at 04:18

Wednesday, Jan 09, 2008 at 04:18
Richard,
We put a 2.75" (I think!!) Beaudesert exhaust on a 2001 Rodeo 3L turbo. Seems a sweeter ute to drive. Do you care to offer a comment?
The tail pipe, (muffler back) remains in the shed while I sort the hydrogen/gas minefield.
Would appreciate your comment.
Jeff.
AnswerID: 280551

Reply By: Member - Pixie - Wednesday, Jan 09, 2008 at 13:33

Wednesday, Jan 09, 2008 at 13:33
a very long time ago when i was looking at extractors for an unleaded car, I was told by an exhaust "specialist" that stainless steel does not produce those white deposits (oxides?) that mild steel does.

Being "upstream" of the catalytic converter those deposits would end up in the cat converter and cause it to block up sooner than than it would otherwise

Not sure on the truth of all that but it's what i was told 20 years ago.
AnswerID: 280593

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