300 TDi exhaust - do I need a muffler?

My Defa ute centre muffler had cracked out so did a cut and shut on a hotdog using the original bolted connections just in case. Rear pipe is a 1994 original. Power is up a bit using the calibrated hill test and no discernable change from in the cabin. Recently one of the kids drove it up a hill when I was standing across the valley from it. Probably a bit noisier from outside but then I'm not normally outside...

:twisted:

I know this post is a bit old..... but any comments on how your muffler mods went ??

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Originally Posted by 86mud

I currently have just the one muffler..

I am going to my mates muffler place tomorrow afternoon, so we will play around with it and I will let you all know.

Thanks all for the advice

Cheers

Andrew

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Don't worry about the centre pipe needing a hot dog. Just fills up with soot. Use a straight pipe.

Update is - best mod for a 300Tdi. With the straight through exhaust (2.5" pipe), bigger intercooler and tweaked pump I get this.... (This is on 285/75 16 MTZ tyres)

Just don't go straight through with a 3" system.

It's far worse than awful.

You'll need a resonator and centre muffler, the resonance and just plain noise is horrific without.
Smaller pipe diameters will be a lot better noise wise.

Quote:

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Originally Posted by 86mud

Update is - best mod for a 300Tdi. With the straight through exhaust (2.5" pipe), bigger intercooler and tweaked pump I get this.... (This is on 285/75 16 MTZ tyres)

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So, "straight through" I assume u don't even have a resonator then ???

Aside from performance changes, How's the noise level then ??? Would the 110 Wagon be worse for noise?

rob

Both my Tdi and TDCi have the rear resonator,everything else is gone. Pat

Hi ,I'm with Pat, i removed the middle muffler and bought one of the aftermarket pipe substitutes.

Can't say i noticed any increase in noise inside the cabin at any speed. ( Or any increase performance or economy either :)

But it certainly a weight savings. cheers simmo

On my old defer I went straight through with the original sized pipe.......noticed increased noise when passenger window was down while on freeway with concrete barriers.

I have a straight through pipe on my 300 Tdi - no resinators, no mufflers. And as said above, keep to 2.5" diameter, no bigger.

Like Weeds said, the only time I hear noise in the cab is when the left rear window is open and i am driving along side a barrier on a freeway.