Silencing the exhaust system.

[JnP]

Hey everyone,

I don't usually post in here, (usually stick to the TVR section), so I'll start with a big hello !!

Here's my problem, I have a TVR ( Tuscan ) which is very very loud !! And I want it to be as quiet as possible for some test.

My question is the following, will it damage the engine or one of the components making the whole engine working properly if I use two silencers from a Peugeot for example and two bike exhaust cans at the end of the silence ?

The point is to reduce the noise by as much as possible without damaging the car.

My last question is, is there a difference between a silencer for a diesel and a petrol ?

Thanks in advice for any info or advice lads

[ian_uk1975]

You won't damage the engine, but, basically, quieter = more restriction and less power. So, the more restrictive you make the exhaust, the quieter it will become. If taken to extremes, the engine will start to run rough as the cylinders will not be scavenged and you'll get reversion.

[maniac0796]

Depends if you want to get rid of high frequencys or low frequencys. High frequencys can be eliminated without too much restriction but low's are a bit harder.

[stevieturbo]

Just fit the biggest and best quality silencers you can on the vehicle.
Any decent exhaust specialist will be able to do this.

There is always room somewhere for silencers to achieve a decent level of silencing.

And silencers do not care what the engine type is. Is the vehicle tuned ? Is making a lot more power than standard ?
Obviously if noise is a big issue, standard exhausts will usually be the quietest

[JnP]

Thanks for the info, the car is standard, nothing has been modified or tuned but the standard cans and exhaust system is almost a free flow one...
I wish I could make my own silencers as the standard arent really usefull but I don't know what if there are specifics to know or if I can just buy metal tubes and metal sheets and cut it out how i want it and just weld everything together...

[ian_uk1975]

JnP said:

Thanks for the info, the car is standard, nothing has been modified or tuned but the standard cans and exhaust system is almost a free flow one...
I wish I could make my own silencers as the standard arent really usefull but I don't know what if there are specifics to know or if I can just buy metal tubes and metal sheets and cut it out how i want it and just weld everything together...

Making an exhaust quiet is the easy bit. Making an exhaust that maximises engine performance is the tricky bit and involves a lot of engineering and physics know-how. Street cars must make compromises in the exhaust system, both to keep manufacturing costs down and to pass type approval regarding noise levels. The latter is why bi-mode exhaust systems are often fitted to sports cars these days.

[JnP]

ian_uk1975 said:

Making an exhaust quiet is the easy bit. Making an exhaust that maximises engine performance is the tricky bit and involves a lot of engineering and physics know-how. Street cars must make compromises in the exhaust system, both to keep manufacturing costs down and to pass type approval regarding noise levels. The latter is why bi-mode exhaust systems are often fitted to sports cars these days.

I see what you mean, I've seen the different types of silencers, multi-chamber and straight through for example, they were talking about back pressure to the engine system and how the straight through is usually better for sports cars as there is little back pressure but that means there is more sound !

[stevieturbo]

JnP said:

I see what you mean, I've seen the different types of silencers, multi-chamber and straight through for example, they were talking about back pressure to the engine system and how the straight through is usually better for sports cars as there is little back pressure but that means there is more sound !

There's more to it than back pressure. And having tested some chambered designs and typical straight through....the straight through silenced more on my car.

Of course, it also depends if you're talking chambered with huge restriction, or performance type.

It could be as simple as your existing silencers are just done. Just buy the biggest straight through silencers you can fit and weld them into place on your current setup.

As much as egay usually sells pure dung, there is a seller, Exhausts UK that sell a huge range of stainless straight through silencers, and given they cost very little are surprisingly good quality.
Certainly the one I bought for my van looked like cheap dung in the photo, but I took a chance and was surprised when a very nice piece arrived.

[blitzracing]

Ive had side pipes made to order by these guys- basically the biggest cherry bomb type pipe they could make. They are made out of mild steel,so heavy and need a good coat of heat proof paint, but cost very little even made to order. Worth a look:

http://www.custom-chrome.co.uk/shop/catalog/index....

[DaveV6]

One trick I've seen is to have the exhaust end in a right angle pointing to the gound. Not much difference in performance but the gound soaks up a lot of the noise.