Sports exhausts

[lime1]

Does fitting an non-AM sports exhaust have any impact on warranty? In addition to improving noise looking for one that gives some good popping and crackling on the overrun. Anyone have any particular recommendations? Does removing fuse 22 give the same effect?

[Adam2S]

yeah just pull out fuse22 and see how you feel. You will get 90% of the gain by removing the fuse and its free and very simple to do. If after a few weeks you want it even more insanely loud then look at a replacement exhaust. I went down that route and was very happy with the fuse only - never felt the need to make it beyond the insane level of loudness with fuse22 out.

[Rye p]

I have a tubi on my car and it makes lots of pops and cracks on the overun.

[C997]

My Vantage has fuse 22 pulled and I thought it sounded good. Then I drove a DBS with a Quicksilver exhaust on it. No comparison, not even close. Go for the aftermarket option.

[Mr Aston Martin]

I think you guys that start to de-face these works of art and awesome british engineering should be taken outside and dealt with in a manner that suites this type of crime.

The FUSE 22 is there for a reason not just for the valves

[Adam2S]

Mr Aston Martin said:

I think you guys that start to de-face these works of art and awesome british engineering should be taken outside and dealt with in a manner that suites this type of crime.

The FUSE 22 is there for a reason not just for the valves

What reason is that then? The only reason it is fitted is to allow the car to pass the noise regulations, so removing it is a very logical step for anybody who wishes to make their car louder.

Do you have some secret knowledge that has been eluding all the members of this and many other Aston Owners forums, and come to think of it the many main dealers who have said it is quite safe to remove fuse 22. I have had the fuse removed by my dealer, with their blessing on both of my Vantages.

Please share your thoughts on what the other reason is...

[toofastforme]

Mr Aston Martin. For your first ever post, it's a glum one indeed!

[3rtt]

Mr Aston Martin said:

I think you guys that start to de-face these works of art and awesome british engineering should be taken outside and dealt with in a manner that suites this type of crime.

The FUSE 22 is there for a reason not just for the valves

..... ......

........

[lime1]

Thanks for the comments. I did read on one website a while back that removing fuse 22 affected the emissions and may mean having to have the ECU remapped. I think it was on a site selling aftermarket exhausts so maybe just a scare to try and get people to buy an exhaust rather than remove the fuse! The guys at the Aston garage didn't seem to think it was a problem. Having driven TVR's for the last 14 years or so I'm seriously looking at a V8V. The noise of the TVR though is hard to match especially with the sports exhaust I have on my Cerb.

[Adam2S]

lime1 said:

Thanks for the comments. I did read on one website a while back that removing fuse 22 affected the emissions and may mean having to have the ECU remapped. I think it was on a site selling aftermarket exhausts so maybe just a scare to try and get people to buy an exhaust rather than remove the fuse! The guys at the Aston garage didn't seem to think it was a problem. Having driven TVR's for the last 14 years or so I'm seriously looking at a V8V. The noise of the TVR though is hard to match especially with the sports exhaust I have on my Cerb.

Yeah its just twaddle by the ill informed. There are no issues whatsoever from removing fuse22, other than noise regs checks. Not sure if thats part of the MOTD these days but it takes 1 min to fit and remove the fuse anyway!

The noise from a TVR is indeed hard to match, but believe me the V8V is more than up to the job. It has to be in the top 10 engine notes produced by any current production car!

[Mr Aston Martin]

Dear Adam

I'm afraid you are the one that miss informed, i don't care what dealers have told you , the symptoms you will experience are as follows

1 Engine light will come on
2 At low revs while you will experience a loss of pick up and sometimes a degree of hesitancy when power is required
3 Can start to affect air flow and fuel mixture into the engine

All of the above are fact trust i am definitely know what i am talking about

You just can't compare Aston Martin and TVR

[Neil1300R]

Mr Aston Martin said:

Dear Adam

I'm afraid you are the one that miss informed, i don't care what dealers have told you , the symptoms you will experience are as follows

1 Engine light will come on
2 At low revs while you will experience a loss of pick up and sometimes a degree of hesitancy when power is required
3 Can start to affect air flow and fuel mixture into the engine

All of the above are fact trust i am definitely know what i am talking about

You just can't compare Aston Martin and TVR

Dear Miss Austin Montego,
When will I definately get any / all of the symptoms? Had my Aston for 18 months, bought from the oldest Aston dealer in the world. Never had Fuse22 in on test drive, delivery, or since. Like all the other members on here I have never experienced the symptoms you mention. Have asked Derby Motor Services (Rick) and the Aston factory re Fuse 22 and they assured me it was quite safe.
Please tell me when I will suffer these symptoms as you obviously know what you are talking about.
Agree you can;t compare Aston Martin and TVR - TVR no longer in business. HTH

[froggie]

If you want pops and bangs try remapping the ECU or even drill the manifolds and inject fuel direct in to them (a friend dose it with gas for flames)

If i wanted a different pipe note id stick a kettle whistle or flute up my pipe,

If i wanted increase in peformance,BIG weight loss and different sound id fit an aftermarket pipe, after decat and finish with remap.

By jamming the valves open would this reduce back preassure in the system?
or reduce flow rate in the primary pipe to the back box?
If the back preassure is reduced wont this effect the flow rate over the landa sensors and through the cats thus reducing efficiencey and changing the readings? hence requiring a change to fueling map? to counter act breathing / fueling changes

So by fitting a freeer flowing back box/system wouldnt it be best to first remove the cats,then fit box and then remap?

[bogie]

Fuse has been out since day of test drive over 3.5 years ago

its been fine

so by the logic of no flap = symptoms, I guess anyone with a sports exhaust and no flap should be driving around with the MIL on too?

[rick-derby-]

Mr Aston Martin said:

Dear Adam

I'm afraid you are the one that miss informed, i don't care what dealers have told you , the symptoms you will experience are as follows

1 Engine light will come on
2 At low revs while you will experience a loss of pick up and sometimes a degree of hesitancy when power is required
3 Can start to affect air flow and fuel mixture into the engine

All of the above are fact trust i am definitely know what i am talking about

You just can't compare Aston Martin and TVR

1. wrong if this was true I would be spending all my time carrying out resets as would the dealer network it would soon upset owners having to constantly have the car reset so no one would take the fuse out, the vast majority of DB9's and V8's i see have fuse 22 out, (we have over 500 Astons that have used us) When we interrogate the car with amds it tells me that their is a fault with the exhaust bypass system yet no emmissions service warning is displayed and clearly states within the Aston OBD manual this code does not flag the warning,
2, you do lose some low down torque this barely noticable and very few people actually ever notice a differance apart from the noise, people who want the best performance from their car fit sports exhausts, 200 cell cats and remap,
3,As the fuel is regulated when at operating temp by the pre cat oxygen sensors these measure the amount of oxygen in the ehaust system and adjust the mixture cycling from rich to weak to maintain lambda which is 14.7 parts of air 1 part fuel, the post cat oxygen sensors main function is to test the efficency of the cat in reducing harmful emmissions thats all, the rear box has no part in this cycle, the fuse justs supply power to the pump for the valves thats it, works service Aston Martin very own workshop will fit you a bypass switch which does exactly the same as removing the fuse cuts the power to this pump, there is talk the valves can stick never have we had one that could not be freed off, and the fault you describe with the throttle lag is usually and issue mainly on the v8 Vantage with the throttle flap sticking and once cleaned makes a big differnce,

From Astons point of view if cars came in with lambda sensor faults wouldn't the warranty be refused because an authorized mod has been done to the exhaust system, This just does not happen, and if Aston had concerns they would issue a warning to all dealers and would probably put it into the owners handbook that removing the fuse could damage your car, never seen or heard of a warning being issued by Aston,

Edited by rick-derby- on Saturday 25th September 08:06

[Simond S]

rick-derby- said:

Mr Aston Martin said:

Dear Adam

I'm afraid you are the one that miss informed, i don't care what dealers have told you , the symptoms you will experience are as follows

1 Engine light will come on
2 At low revs while you will experience a loss of pick up and sometimes a degree of hesitancy when power is required
3 Can start to affect air flow and fuel mixture into the engine

All of the above are fact trust i am definitely know what i am talking about

You just can't compare Aston Martin and TVR

1. wrong if this was true I would be spending all my time carrying out resets as would the dealer network it would soon upset owners having to constantly have the car reset so no one would take the fuse out, the vast majority of DB9's and V8's i see have fuse 22 out, (we have over 500 Astons that have used us) When we interrogate the car with amds it tells me that their is a fault with the exhaust bypass system yet no emmissions service warning is displayed and clearly states within the Aston OBD manual this code does not flag the warning,
2, you do lose some low down torque this barely noticable and very few people actually ever notice a differance apart from the noise, people who want the best performance from their car fit sports exhausts, 200 cell cats and remap,
3,As the fuel is regulated when at operating temp by the pre cat oxygen sensors these measure the amount of oxygen in the ehaust system and adjust the mixture cycling from rich to weak to maintain lambda which is 14.7 parts of air 1 part fuel, the post cat oxygen sensors main function is to test the efficency of the cat in reducing harmful emmissions thats all, the rear box has no part in this cycle, the fuse justs supply power to the pump for the valves thats it, works service Aston Martin very own workshop will fit you a bypass switch which does exactly the same as removing the fuse cuts the power to this pump, there is talk the valves can stick never have we had one that could not be freed off, and the fault you describe with the throttle lag is usually and issue mainly on the v8 Vantage with the throttle flap sticking and once cleaned makes a big differnce,

From Astons point of view if cars came in with lambda sensor faults wouldn't the warranty be refused because an authorized mod has been done to the exhaust system, This just does not happen, and if Aston had concerns they would issue a warning to all dealers and would probably put it into the owners handbook that removing the fuse could damage your car, never seen or heard of a warning being issued by Aston,

Thanks Rick.

This is exactly the reason that you will be gaining another DB9 for servicing when it become due in January. I yet to see a single post that isn't well informed and backed up. Many thanks.

ps. I think Mr Aston Martin should change his name. Not really good for AM to have him as their promotional tool

[Adam2S]

Thanks Rick - I think that put Mr Martin Asstalk in his place!

[Mr Aston Martin]

Boring boring boring boring

[FloPlast]

Having new larini exhaust fitted next week for my V12v, then going down for testing at Larini on the 11th Oct for fine tuning. Will post sound clip once done

Edited by FloPlast on Saturday 25th September 15:37

[Rye p]

Cool i've been waiting for a V12V owner to post an aftermarket exhaust.