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fee



Member Since: 01 Feb 2013
Location: Thailand
Posts: 17
Defender 2.2 Hayward & Scott exhaust - inconsistent soun
The exhaust has been on my 2012 defender for about 6 months and I've noticed that my engine sound is inconsistent. This Hayward & Scott exhaust has no boxes. I was expecting it to sound a bit louder all the time but it is not louder at all.

Most of the time, the exhaust note will be very standard.(like having a standard factory exhaust) and sometime, it will have a deeper sound (like performance exhaust)

I drive about an hour to work and it will get deeper and louder for about 15 minutes sometime in the journey, then back to sounding standard again.

Can anyone please help explain this change in exhaust note? Didn't happen when I had the factory exhaust on.
Post #446523 16th Aug 2015 3:31pm
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lohr500



Member Since: 14 Sep 2014
Location: Skipton
Posts: 1316
United Kingdom 2013 Defender 110 Puma 2.2 XS CSW Santorini Black
Just a wild guess as I am no expert on these things but could it be the DPF doing a regen cycle occasionally? Assuming Thai spec Defenders have the DPF and that it wasn't removed as part of the exhaust mod.
Post #446548 16th Aug 2015 5:45pm
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Defender-Stu



Member Since: 14 Jun 2012
Location: South West England
Posts: 1320
United Kingdom 
The deeper sound is the dpf working and then going off, the only way to get a nice sound is to de car/de DPF it but we are not aloud in the UK 😞
Post #446619 16th Aug 2015 9:29pm
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fee



Member Since: 01 Feb 2013
Location: Thailand
Posts: 17
Thank you for your reply. So I can assume this is a regeneration cycle for the DPF? How often does it usually happen? My driving weather conditions: hot, sometime lots of traffic. But don't usually hear the sound when in traffic (mileage 11,000)

What does the regen suppose to sound like?
Post #446659 17th Aug 2015 12:25am
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Schw8te



Member Since: 03 Jun 2012
Location: NRW
Posts: 27
Germany 2013 Defender 90 Puma 2.2 SW Santorini Black
Reg comes up every 400km, more or less.

Det locker bleiben
Post #446664 17th Aug 2015 5:45am
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