Advice - 3" STAINLESS exhaust NOT JT please...
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A 3" S/S system is my eventual intention too - MapTun promise such a aystem "summer 2004"
http://www.maptun.com/about_avgas.php?page=about
Not sure of cost though!!
I hope my std system lasts till then!
http://www.maptun.com/about_avgas.php?page=about
Not sure of cost though!!
I hope my std system lasts till then!
I have a s/s 3" d/p and exhaust from Hayward & Scott in Basildon, Essex and it is very well made and good value for money. They provide a great friendly service and really know their business, and will make it sound how you want, and they have done several 9000 Aeros in the past year. Add a 3" highflow Catco s/s cat from SummittRacing.com for about 30GBP and you will have a great sounding system.
Aerohead - saw your thread (I think) a long time ago on Saabnet, and contacted H&S. I know their quality as I had one of theirs on my Impreza a few years back. They only quaoted for a 2.5" system and not 3". Are you sure you got 3" all the way back? Would be keen to use them again
Zip
Zip
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234 Posts
Hi Zip,
Was thinking the same myself several months ago and found Blueflame ( http://www.blueflameperformance.com/ )to be very helpful.
They offered either 2.5" or 3" S/S catback system for £300 including flexi section and interchangeable cat bypass pipe with all correct fittings.
Unfortunately, the wife got wind of what I was up to and scuppered my evil plans (drat, drat & double drat).
If I manage to get the money together, I will definitely be going there (assuming the wife doesn't make me buy a "sensible motor" - read "newer Jap thing with much better fuel consumption" for "sensible motor").
Good luck,
Pete
Was thinking the same myself several months ago and found Blueflame ( http://www.blueflameperformance.com/ )to be very helpful.
They offered either 2.5" or 3" S/S catback system for £300 including flexi section and interchangeable cat bypass pipe with all correct fittings.
Unfortunately, the wife got wind of what I was up to and scuppered my evil plans (drat, drat & double drat).
If I manage to get the money together, I will definitely be going there (assuming the wife doesn't make me buy a "sensible motor" - read "newer Jap thing with much better fuel consumption" for "sensible motor").
Good luck,
Pete
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968 Posts
Just a thought, but has anyone used PowerFlow exhausts. I had one on my ST200 Mondeo before I got my 9K and I was very impressed. They custom build it to your car and you can choose what tail pipe you want etc....
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968 Posts
ah, I wasnt sure either. I know my one on my ST200 was 2.5 like yours... As you say tho, brilliant build quality...
My 9000 FPT has one too.... Nothing to do with me, was there when I bought the car...
Aerohead - saw your thread (I think) a long time ago on Saabnet, and contacted H&S. I know their quality as I had one of theirs on my Impreza a few years back. They only quaoted for a 2.5" system and not 3". Are you sure you got 3" all the way back? Would be keen to use them again
Zip
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H&S can make anything you want, including full 3" s/s, and if you go for a full system they will give you exactly the sound you are after, they know their stuff.
Zip
____________________________________________
H&S can make anything you want, including full 3" s/s, and if you go for a full system they will give you exactly the sound you are after, they know their stuff.
Joined
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14,305 Posts
I'm looking to go for a full 3" system at some point, but I suspect I may stick with an aluminised front section. Stainless steel can fracture under heat stress/cycle (my last SS downpipe did) whereas mild steel is more tolerant, especially in high performance applications. This probably isn't a problem under 300hp though.
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3,618 Posts
Can I suggest Milltek?
They are fantastic on fast audis etc..
And they would do a custom job.
http://www.milltek.co.uk/
They are fantastic on fast audis etc..
And they would do a custom job.
http://www.milltek.co.uk/
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1,592 Posts
Why not a steel JT exhaust? I thought about stainless, but the JT system is so cheap and works so well that I am quite happy to replace the odd section if it does corode. I have heard pretty good reports concerning how long they last.
I had a Blue Flame exaust on my Elise. The first one didn't fit, so had to be returned. I was one of many with this experience. I'm not saying don't buy from them; just beware.
I had a Blue Flame exaust on my Elise. The first one didn't fit, so had to be returned. I was one of many with this experience. I'm not saying don't buy from them; just beware.
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4,215 Posts
the rear tailpipe is stainless !!
see here....
http://free.one.picturehost.co.uk/DSC00603.JPG
mmm shiney !!
see here....
http://free.one.picturehost.co.uk/DSC00603.JPG
mmm shiney !!
_______________________________________________
MarkE wrote:
I'm looking to go for a full 3" system at some point, but I suspect I may stick with an aluminised front section. Stainless steel can fracture under heat stress/cycle (my last SS downpipe did) whereas mild steel is more tolerant, especially in high performance applications. This probably isn't a problem under 300hp though.
_______________________________________________
If you do go with a s/s system I know H&S stands behind their work and will replace any cracked d/p because indeed s/s is more likely to fail, especially w/ big heat.
MarkE wrote:
I'm looking to go for a full 3" system at some point, but I suspect I may stick with an aluminised front section. Stainless steel can fracture under heat stress/cycle (my last SS downpipe did) whereas mild steel is more tolerant, especially in high performance applications. This probably isn't a problem under 300hp though.
_______________________________________________
If you do go with a s/s system I know H&S stands behind their work and will replace any cracked d/p because indeed s/s is more likely to fail, especially w/ big heat.
Joined
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1,448 Posts
Ok firstly ... stainless steel is not just one metal. There are many grades.
Type 304 stainless is what's most commonly used in exhaust systems. It is the BOTTOM OF THE LINE stainless steel used on most exhuasts. (Type 302 etc are rarely used.)
321 stainless steel is a step up, and designed for the high heat world of turbine exhaust stacks.
Here are some facts on both:
AISI Type 304 Stainless Steel
Material Notes:
Austenitic Cr-Ni stainless steel. Better corrosion resistance than Type 302. High ductility, excellent drawing, forming, and spinning properties. Essentially non-magnetic, becomes slightly magnetic when cold worked. Low carbon content means less carbide precipitation in the heat-affected zone during welding and a lower susceptibility to intergranular corrosion.
Applications: beer kegs, bellows, chemical equipment, coal hopper linings, cooking equipment, cooling coils, cryogenic vessels, dairy equipment, evaporators, flatware utensils, feedwater tubing, flexible metal hose, food processing equipment, hospital surgical equipment, hypodermic needles, kitchen sinks, marine equipment and fasteners, nuclear vessels, oil well filter screens, refrigeration equipment, paper industry, pots and pans, pressure vessels, sanitary fittings, valves, shipping drums, spinning, still tubes, textile dyeing equipment, tubing.
(Notice they don't mention exhausts of any kind as an application. Doesn't stop people from using it for them though.)
Corrosion Resistance: resists most oxidizing acids and salt spray.
AISI Type 321 Stainless Steel
Material Notes:
Titanium-bearing, austenitic, chromium-nickel steel. Stabilized against carbide precipitation and designed to work within the temperature range where carbide precipitation develops. Similar to Type 304 except Ti content helps prevent chromium carbide precipitation resulting from welding or elevated temperatures. Stabilized at annealing temperatures between 950-1010°C (1750-1850°F). Resists scaling and vibration fatigue. Applications include aircraft exhaust stacks and manifolds, chemical processing equipment, weld equipment, jet engine parts.
Most exhaust companies choose the 304 simply because it's slightly cheaper.
304 s/s is also the culprit for stainless steel tube header's reputation for cracking on turbo cars. Were those tube headers made of 321 they would not crack.
I've no idea if anyone makes 321 stainless exhausts for Saabs, but if you're going to a custom shop you could look into buying some tubing. I believe www.aerospacemetals.com sells tubing, though you'd need to get a quote to find the price. They also sell Nimonic and Inconel alloy bits and pieces. Not useful for downpipes, but if someone wants to make headers, Inconel would be a top choice.
Anyhow ... just my two cents for the convo.
Dubbya~
Type 304 stainless is what's most commonly used in exhaust systems. It is the BOTTOM OF THE LINE stainless steel used on most exhuasts. (Type 302 etc are rarely used.)
321 stainless steel is a step up, and designed for the high heat world of turbine exhaust stacks.
Here are some facts on both:
AISI Type 304 Stainless Steel
Material Notes:
Austenitic Cr-Ni stainless steel. Better corrosion resistance than Type 302. High ductility, excellent drawing, forming, and spinning properties. Essentially non-magnetic, becomes slightly magnetic when cold worked. Low carbon content means less carbide precipitation in the heat-affected zone during welding and a lower susceptibility to intergranular corrosion.
Applications: beer kegs, bellows, chemical equipment, coal hopper linings, cooking equipment, cooling coils, cryogenic vessels, dairy equipment, evaporators, flatware utensils, feedwater tubing, flexible metal hose, food processing equipment, hospital surgical equipment, hypodermic needles, kitchen sinks, marine equipment and fasteners, nuclear vessels, oil well filter screens, refrigeration equipment, paper industry, pots and pans, pressure vessels, sanitary fittings, valves, shipping drums, spinning, still tubes, textile dyeing equipment, tubing.
(Notice they don't mention exhausts of any kind as an application. Doesn't stop people from using it for them though.)
Corrosion Resistance: resists most oxidizing acids and salt spray.
AISI Type 321 Stainless Steel
Material Notes:
Titanium-bearing, austenitic, chromium-nickel steel. Stabilized against carbide precipitation and designed to work within the temperature range where carbide precipitation develops. Similar to Type 304 except Ti content helps prevent chromium carbide precipitation resulting from welding or elevated temperatures. Stabilized at annealing temperatures between 950-1010°C (1750-1850°F). Resists scaling and vibration fatigue. Applications include aircraft exhaust stacks and manifolds, chemical processing equipment, weld equipment, jet engine parts.
Most exhaust companies choose the 304 simply because it's slightly cheaper.
304 s/s is also the culprit for stainless steel tube header's reputation for cracking on turbo cars. Were those tube headers made of 321 they would not crack.
I've no idea if anyone makes 321 stainless exhausts for Saabs, but if you're going to a custom shop you could look into buying some tubing. I believe www.aerospacemetals.com sells tubing, though you'd need to get a quote to find the price. They also sell Nimonic and Inconel alloy bits and pieces. Not useful for downpipes, but if someone wants to make headers, Inconel would be a top choice.
Anyhow ... just my two cents for the convo.
Dubbya~
Some time ago I contacted Hayward and Scott for a price for both a manifold and a pipe for my 99. £900+VAT for the manifold I didn't think was too bad, but £550+VAT for the exhaust with only 1 silencer I thought was very expensive! Almsost every other supplier I spoke to could do it for around half that.
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