[ROVERNET - UK] exhaust and back pressure

Gundry, Kenneth KG at dolby.com
Thu Aug 12 00:26:01 BST 2004

Dear John,

Yes, I realize that silencers can reduce power, but recent correspondence shows that the matter is a lot more complicated than I had thought, and that the test I envisaged, disconnecting the exhaust pipe at the manifold, could actually degrade the performance.  I really have no good reason to suppose there is any problem, but thought I would explore the subject.  The other point of course is that since the silencer on my car is certainly not the same as the one Rover installed in 1925, it is possible that the replacement is unsuitable.  I think the responses so far hint that it is unlikely to be a major factor.


Ken G, 1925 Rover 16/50 (San Francisco)

-----Original Message-----
From: rovernet-bounces at lyris.ccdata.com
[mailto:rovernet-bounces at lyris.ccdata.com]On Behalf Of John Atkin
Sent: Wednesday, August 11, 2004 4:18 PM
To: rovernet at lyris.ccdata.com
Subject: Re: [ROVERNET - UK] exhaust and back pressure

All mufflers/silencers restrict the exhaust flow to some extent but the
least resistance is with a straight through one but it's a bit noisier and
may not be legal in some places. When I had a motor-cycle , I and all my
friends used to drill out the baffles in the silencers to make more noise
and give a better top speed.
best wishes
John Atkin(IOW.UK)

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