V8 Vantage exhaust quieter than others?

[Johnny42]

I have a MY15 V8 Vantage, which seems to have an exhaust that doesn't get loud.
Having driven an MY16 car recently, it was possible to spot the exact RPM at which the valves opened up and it became rather loud. Chalk and cheese compared to mine.
I've had my car from new and it's never done this. The exhaust note is quiet all the way to the red line, it builds up slowly but there is no sudden step change at 2500 or 3500 rpm.
After removing fuse 15 and checking that the valves are open (vacuum released, actuators are in the 'down' position), it's still quiet.

This seems to be an impossibility. Unless my back box has been built without holes in one of the baffles. Rather unlikely!

Does everyone else with a V8 have a noticable step change in exhaust sound at 3500/2500?

[bogie]

There should be noticeable change at 4k revs. With fuse 15/22 out then no change, but loud all the time.

It could be that the vacuum pump for your exhaust is faulty and/or the valves are seized

[Johnny42]

Thanks Bogie, I can move the valve on the left by hand. It's in the up position with the vac pump on, and I can get it to stay down with the fuse pulled...

[bogie]

MMm....sounds really odd. If you can move the valves manually and still not notice a difference

Ive not driven a MY15 car, just an MY16 S demo and of course that had sports exhaust anyway. I would get someone to check it for you. A dealer should have some demo cars you can try to be sure.

[Johnny42]

I had the MY16 from a dealer for a week. It was a demonstrator. Exhaust blew me away. Not just the sound, but the very noticable sudden step change as the valves opened.