[ROVERNET - UK] exhaust and back pressure

[Ron Morey]

Ken, I have found that when the muffler falls off, (experiences of many 
years past), there may be a lot more sound and I may think there is more 
power but it usually takes a little longer to go through the gears. So 
unless you have a dyno I do not think you will prove an exhaust problem by 
removing the muffler. You may have better results by comparing the sizes of 
each junction to make sure they are atleast the minimum spec'd. Since you 
seem to be talking about an older Rover I am going to ask the obvious. Have 
you had the tune checked, along with the advance of the distributor and 
condition of carb(s)? Is this the older engine discussed a few months ago 
that was rebuilt and therefore is not presently carboned up? Sorry if I 
missed the preamble and all this has been discussed before.
Hope this helps, Ron.

>From: <defender110 at ozemail.com.au>
>Reply-To: rovernet at lyris.ccdata.com
>To: <rovernet at lyris.ccdata.com>
>Subject: Re: Re: [ROVERNET - UK] exhaust and back pressure
>Date: Thu, 12 Aug 2004 12:02:02 +1000
>
>Internal combustion engines require a "scavenging" effect to help the spent 
>gasses exit the cylinders, otherwise loss of power is the result. Open 
>ports do not provide this ...
>
>Dave Read
>South Oz
>
> >
> > From: "Damien" <koffee at iprimus.com.au>
> > Date: 12/08/2004 7:29:29
> > To: <rovernet at lyris.ccdata.com>
> > Subject: Re: [ROVERNET - UK] exhaust and back pressure
> >
> > Hi when you disconnect the exhaust at the manifold the actual power 
>seems to
> > drop (from my experience) maybe it is just the nosie is so excessive. if 
>you
> > can disconnect further back as i think you need some level of 
>backpressure
> > for the engine to work. But maybe i am just blowing this out my exhaust 
>pipe
> > lol.
> >
> > Damien
> > ----- Original Message -----
> > From: "Connie R Pennington" <wcpennington at juno.com>
> > To: <rovernet at lyris.ccdata.com>
> > Sent: Thursday, August 12, 2004 7:02 AM
> > Subject: Re: [ROVERNET - UK] exhaust and back pressure
> >
> >
> > >
> > > Hello Kenneth,
> > >          If you can disconnect the muffler from the exhaust pipe it 
>would
> > > be better than running with an open manifold I think.
> > >                                                      Joe
> > >
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> >
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>
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>
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