Aye Up All,
Renovation work continues on my ‘97 D1 V8 and which now has to include attention to the exhaust system.
The whole system including lambdas looked fairly new on pre purchase inspection so I didn’t give it too much attention.
It is presently fitted with what I thought were a standard Y pipe with cats; a centre silencer; over-the-axle pipe and a rear silencer.
I first noticed that something might be amiss when days after purchase a small amount of ‘soot’ appeared on the driveway. Closer inspection identified a leak at the coupling flange of the Y pipe and centre box and what looks like a slightly crumpled middle box. My suspicions were that the truck had been reversed into something, catching the tailpipe and pushing the whole system forwards.
It was only whilst recently laying around under the vehicle waiting for the TX box oil to drain that I discovered that the flange on the end of the Y pipe where it joins the centre box has been bodge welded right around the circumference of the pipe. I’m not sure whether this too was a result of the previously assumed collision.
To add insult to injury at the end of a recently long journey an annoying ‘tinny’ vibration has developed when moving at low revs roundabout 10 - 15mph and which disappears with further acceleration. I’m hoping it’s the centre box baffles and not the auto box!!
With replacement in mind I’ve been toying with doing away with the centre box altogether and running a straight pipe through to an over-the-axle section and onwards to the rear silencer but having trawled through a number of threads on the site I’m also reading of keeping the centre box and running a pipe out to the rear/rear side and doing away with the rear silencer.
Whilst I do like the idea of ‘tweaking’ the sound of the V8 I’m more interested in saving brass on not having to fork out for two silencers as well as maintaining performance.
I have heard a V8 with a straight through pipe and no silencers at all which sounds nice (but yes, legally questionable) and one with only a rear silencer which sounds a fair bit quieter but in no way excessively loud.
So is there a definitive answer as to which way around to do it - i.e. is one way more likely to affect back pressure more than another and hence interfere with the engine performance or will there be no difference?
Thanks
Renovation work continues on my ‘97 D1 V8 and which now has to include attention to the exhaust system.
The whole system including lambdas looked fairly new on pre purchase inspection so I didn’t give it too much attention.
It is presently fitted with what I thought were a standard Y pipe with cats; a centre silencer; over-the-axle pipe and a rear silencer.
I first noticed that something might be amiss when days after purchase a small amount of ‘soot’ appeared on the driveway. Closer inspection identified a leak at the coupling flange of the Y pipe and centre box and what looks like a slightly crumpled middle box. My suspicions were that the truck had been reversed into something, catching the tailpipe and pushing the whole system forwards.
It was only whilst recently laying around under the vehicle waiting for the TX box oil to drain that I discovered that the flange on the end of the Y pipe where it joins the centre box has been bodge welded right around the circumference of the pipe. I’m not sure whether this too was a result of the previously assumed collision.
To add insult to injury at the end of a recently long journey an annoying ‘tinny’ vibration has developed when moving at low revs roundabout 10 - 15mph and which disappears with further acceleration. I’m hoping it’s the centre box baffles and not the auto box!!
With replacement in mind I’ve been toying with doing away with the centre box altogether and running a straight pipe through to an over-the-axle section and onwards to the rear silencer but having trawled through a number of threads on the site I’m also reading of keeping the centre box and running a pipe out to the rear/rear side and doing away with the rear silencer.
Whilst I do like the idea of ‘tweaking’ the sound of the V8 I’m more interested in saving brass on not having to fork out for two silencers as well as maintaining performance.
I have heard a V8 with a straight through pipe and no silencers at all which sounds nice (but yes, legally questionable) and one with only a rear silencer which sounds a fair bit quieter but in no way excessively loud.
So is there a definitive answer as to which way around to do it - i.e. is one way more likely to affect back pressure more than another and hence interfere with the engine performance or will there be no difference?
Thanks
