Hector a écrit :Dear Sir/Madam,

First please accept my apologies for contacting you in English, but I am from France and can't speak Swedish.

I drive a Volvo V70 MY'02 with D5 engine (Diesel, 163hp) and would be interested in purchasing an exhaust system from Simons Sport to replace the original ageing system. But I am concerned about the sound levels of such system (02B-H1R according to your on-line catalog). France is a very restrictive country regarding this and having problems with MOT and law enforcement officers is not what I want.

So here is my inquiry: Do you have Sound Level or Acoustic Power data that you would be willing to communicate, so I could check if the product I intend to buy is within the approval level my vehicle must legally conform to? Charts or tables showing how much sound is produced with engine revs, for example, would be ideal.

I hope my inquiry is something you can cope with and look forward to hearing from you.

Best Regards

David Angerd a écrit :Hello,

One might blieve that we have all kind of data for all systems and engines. This is unfotunatly wrong. We primarily contentrate our work on the biggest petrolengines. When this is OK we most often know that the exhaust will be sufficient for the smaller engines and also for the diesel engines. When it comes to the diesel engines there is one factor wich is critical, and its the particulate filter on the OEM front parts of the exhaust. If no filter, the sound might be higher than the petrol engine, but with it the sound may be reduced to almost nothing. Unfortunatly we do not have any sound data wich is reliable for the diesel engine. The conclusion will be the following: If you have a particulate filter I promise you will have no problems with the sound going up. If you do not have a particulate filter the sound might go up above the "French Police Limit".

Vänliga Hälsningar - Best Regards

David Angerd
RAY Metallfabrik AB

(12-03-2013, 14:09:10)Hector a écrit : @Baron
Oui merci je sais lire l'anglais (et même l'écrire). Cela dit tu surinterprètes légèrement en disant que ma bagnole fera BEAUCOUP de bruit. Dans sa réponse, David explique que le risque existe que le niveau de bruit soit supérieur à la limite légale : c'est le sens de "might" dans "If you do not have a particulate filter the sound might go up above the "French Police Limit". Il ne dit pas qu'elle va faire un potin du diable, juste qu'elle risque de faire plus de bruit que prévu par l'homologation.
De toute façon je ne vais pas chercher plus loin. Je n'achèterais pas chez eux, pas envie d'avoir des problèmes en cas de contrôle. Et quand il faudra changer, je chercherai du côté des lignes inox, mais standard, pas sport.
Je trouve quand même étonnant que cette boîte ne donne aucune donnée chiffrée pour les produits qu'elle vend. Sur le site, il n'y a rien, même pas des vidéos pour donner une idée de ce que le produit donne en situation. En gros, t'es obligé d'acheter pour voir et entendre.

(13-03-2013, 12:30:35)volvotosor a écrit : si ça peu faire avancer le truc, sur ma V40 que du tube inox avec juste le silencieux arrière, bin ça reste très discret, juste le son un peu plus grave et aucun soucis pour le CT

Hector a écrit :Hello David,

Many thanks for your reply and taking time to answer my question.
I understand your point. I am however a bit disappointed for not being able to get an idea, even vague, of what level of sound power the exhaust system may deliver.
You may be of help anyway if you'd like. You claim that at Simons you focus on big petrol engines. Then could it be that you'd have any sound data for the T5 engine from Volvo? Or for any other big and powerful 5-cylinder engine from Volvo being equipped with your 02B-H1R system? I would just need to know how much dBs are output at the engine speed of 3,000 rpm. I could then compare with the value specified for my car as the legal limit (that is 82 dB). With a bit of luck, this would be okay, who knows?
I think that would help me a lot in my purchasing decision.

Many thanks in advance for all your efforts. I look forward to hearing from you.

Best Regards

David Angerd a écrit :Hello,

The biggest problem is that you have a diesel engine. I could give you an hint about the soundlevel for the T5 but this measurements are made with sample silencers wich are handmade and not 100% as the ones we produce and sell. This gives you an double disadvantage in this case. I´m sorry, but trying to give you an hint might end up in disaster for you. If you do not have an praticulate filter I believe that the sound will be higher than 82 dB.

I wish you good luck!
Regards