Exhaust

dubbleRR · Jul 9, 2017

Hi all, Is there a difference in diesel and petrol exhausts (after the cat)there a S,steel one listed on the bay for a diesel at £299 and a petrol for£249 ,they look the same.

Sorry iv a 2.5 dse p38 ...

tarphenry · Jul 9, 2017

Cant see why there would be , its only a pipe

wammers · Jul 9, 2017

Tail pipes, both single and twin are the same for both diesel and petrol models. WDV100250 single pipe. WDV100260 L/H twin pipe. WDV100270 R/H twin pipe. Those are mild steel units, stainless may carry a different part number, but basically same pipe in a different material.

dubbleRR · Jul 9, 2017

Cheers wammers

thinking o buying the petrol ss exhaust its cheaper and almost the same price as an after market which might do 2 years

Grrrrrr · Jul 9, 2017

dubbleRR said:
Cheers wammers thinking o buying the petrol ss exhaust its cheaper and almost the same price as an after market which might do 2 years

Think the changeover to twin pipes was '97. I would imagine the diesel one would be a bigger gauge so thicker. Usually diesels are. Not checked though.

wammers · Jul 9, 2017

Grrrrrr said:
Think the changeover to twin pipes was '97. I would imagine the diesel one would be a bigger gauge so thicker. Usually diesels are. Not checked though.

All previous pipe part numbers for the twin tail pipes have been superseded by the ones in my previous post, single pipes and twin pipes are the same part numbers petrol or diesel.

Grrrrrr · Jul 9, 2017

wammers said:
All previous pipe part numbers for the twin tail pipes have been superseded by the ones in my previous post, single pipes and twin pipes are the same part numbers petrol or diesel.

Odd. Diesels normally thicker. Bizarre the same part costs more to have diesel written on it!

wammers · Jul 9, 2017

Grrrrrr said:
Odd. Diesels normally thicker. Bizarre the same part costs more to have diesel written on it!

Have a look at Rimmer Bros, not something you want to be buying from them i would think. Just over £300.00 for the single tail pipe in mild steel.

Grrrrrr · Jul 9, 2017

wammers said:
Have a look at Rimmer Bros, not something you want to be buying from them i would think. Just over £300.00 for the single tail pipe in mild steel.

Yeah, I got mine from StainlessSteelExhausts.com for about the same price. What has become apparent (especially lying under it the last few days) is that the boxes look stainless but the connecting pipe already has rust spots and looks like mild steel. What's the bl**dy point of a stainless box if the connecting pipe is mild steel? Not entirely impressed but after 2 years I guess I'm a little late to hand it back.

dubbleRR · Jul 9, 2017

Grrrrrr said:
Bizarre the same part costs more to have diesel written on it!

ye i know strange unless its got less soot catching bits inside..,think there all 2.5" bore ,tail pipe is 3" ss looks neat at the back,,Doo just fitted a new twin rear and he dont like the way There two shiny ,his words (ar5e cheeks hang down)think hes talking about the car.

pwood999 · Jul 9, 2017

Make sure you measure the replacement versus the original before trying to fit the pipes. I got a full system (nicely discounted) from my All Parts contact, but found the centre section was 2 inches shorter that the original. Consequently it was impossible to get the dual rear pipe to line up. Took it back to All Parts, and they ordered another section which was correct.

frog hopper · Jul 9, 2017

Carefull with "cheap" SS stuff, just because it says stainless dont mean it wont rust. All depends on the grade used, cant remember the numbers now but perhaps steer away from SS that you can stick a magnet on.

dubbleRR · Jul 10, 2017

T304 ,does that ring a bell

thats what they say in the description ...On to another point one company selling a standard centre box ,said its got a resonator

whats a resonator,might be the difference between petrol n diesel and 50 quid on the ss one

...

mutsnutz · Jul 10, 2017

SAE 304 stainless steel also known as A2 stainless steel (not the same as A2 tool steel) or 18/8 stainless steel, European norm 1.4301, is the most common stainless steel. The steel contains both chromium (usually 18%) and nickel (usually 8%) metals as the main non-iron constituents. It is an austenite steel. It is not very electrically or thermally conductive and is non-magnetic. It has a higher corrosion resistance than regular steel and is widely used because of the ease in which it is formed into various shapes. It contains 17.5–20% chromium, 8–11% nickel, and less than 0.08% carbon, 2% manganese, 1% silicon, 0.045% phosphorus, and 0.03% sulfur.[1]

The composition was developed by W. H. Hatfield at Firth-Vickers in 1924 and was marketed under the trade name "Staybrite 18/8".[2]

Corrosion resistance[edit]
304 stainless steel has excellent resistance to a wide range of atmospheric environments and many corrosive media. It is subject to pitting and crevice corrosion in warm chloride environments and to stress corrosion cracking above about 60 °C. It is considered resistant to potable water with up to about 200 mg/L chlorides at ambient temperatures, reducing to about 150 mg/L at 60 °C.

mutsnutz · Jul 10, 2017

The exhaust pipes in automobile exhaust systems are designed as acoustic resonators that work with the muffler to reduce noise, by making sound waves "cancel each other out".[3] The "exhaust note" is an important feature for some vehicle owners, so both the original manufacturers and the after-market suppliers use the resonator to enhance the sound. In "tuned exhaust" systems designed for performance, the resonance of the exhaust pipes can also be used to remove combustion products from the combustion chamber at a particular engine speed or range of speeds

Grrrrrr · Jul 10, 2017

frog hopper said:
Carefull with "cheap" SS stuff, just because it says stainless dont mean it wont rust. All depends on the grade used, cant remember the numbers now but perhaps steer away from SS that you can stick a magnet on.

I was aware of that and did check. The impression they gave was that the whole system was stainless. That does not appear to be the case.

Hairyasswelder · Jul 10, 2017

Grrrrrr said:
I was aware of that and did check. The impression they gave was that the whole system was stainless. That does not appear to be the case.

Stick a magnet on it
Any grade below 304 is magnetic and classed as chrome iron (ferrous)
Many places use cheaper alternatives, ever wondered why your fridge magnet sticks to your 'stainless' fridge?? 'Stainless' cooker etc.
Due to the heat and moisture and constant heat and cool cycle with a barrage of rock salt spray, stainless is not really ideal for the job.
The clue is in the name 'stain......less' will outlast most materials in its price range and is vastly superior to mild steel.
Options would be inconol at a vastly high premium (10kg roll of mig wire £1000) or ceramic coating.

wammers · Jul 11, 2017

Best stainless is Austenitic, none magnetic and does not harden with heat. Then Ferritic can be hardened with heat that is possibly the reason early stainless exhausts made with this material had a tendency to crack near to a welded joint. Then Martensitric does not harden with heat but is less corrosion resistant.

dubbleRR · Jul 11, 2017

pwood999 said:
found the centre section was 2 inches shorter that the original[/QUOTE There must be two middle sections,different as in petrol n diesel ,The listing is for 4.0,4.6 ,phoned the company ,dont do diesel and the one i seen for £300 has disappeared Think it might be mild (Ar5e cheeks hanging down,,,doo,s words) steel and"i so wanted to show off at Doo with his gas powered air horns

Doo · Jul 11, 2017

My new back boxes are very much on show and remind me of a fat bird wearing a mini skirt, which shows her somewhat unattractive arse cheeks hanging out.

I would like to hide them a little using some sort of rear bumper skirt or whatever...

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