[goldenlabs99]

what about engine noise in s40 2.4 i -- seems very noticeable at certain rpms/at certain speeds -- when accelerating rapidly -- has this been noticed by others....any suggestions

Modified by goldenlabs99 at 11:36 AM 5-16-2005

 

[sag40]

Re: engine noise for 2.4i (goldenlabs99)

I have the 2.4i and I think it's actually pretty quiet - especially at cruising speeds - but I kind of like the lower engine note when accelerating, I think that is characteristic of the Volvo 5 cylinder.

 

[VolvoINSIDE]

You're right, the engine noise is noticeable. But not because the engine is loud. Poor insulation IMHO. If you stand outside and listen to the car with the hood down, it is fairly quiet. Lift the hood up and the engine sounds really weird.

During acceleration it is pretty loud. But I like it. Gives the car some characteric traits.

Cruising it is very quiet. UNLESS YOU ARE CRUISING BETWEEN 80-85 mph ... have you noticed that? The engine is ridiculously loud during those speeds. Cruising at 90 is fine, fairly quiet. But between 80-85 it sounds like I'm flooring it... Can someone please confirm this for me.

Or is it because the car is running at 3000rpm - 3500rpm, which also is really loud. But that loudness I think is due to the Variable Valve Timing that our engines have. I used to love cruising at 80-85 mph... but now I have to slow it down or speed it up.

 

[goldenlabs99]

Re: (VolvoINSIDE)

Can you tell me if the Variable valve timing mechanism is controlled through modifiable firmware?

Can it be modified through software by dealer?

 

[VolvoINSIDE]

I have no idea whether it's controlled by software. But the variable valve timing is the same thing as VTEC on Hondas. I think. Here's a link on how it works. If I'm wrong about our Volvo variable valve timing being different from VTEC, someone please correct me.

http://auto.howstuffworks.com/question229.htm