Thread: Tail pipe design

Originally Posted by Ben

My compliance plate doesn't list ADR 9 (which I think then became 42 'General Safety Requirements').

Turns out ADR 9 was about "Automatic Transmission Controls". Repealed, but now incorporated into ADR 42.

The Road Vehicle Certification System website shows the ADRs applicable for MD1 vehicles from 1973.

That's where I got ADR 9 from, states it was mandatory.

Originally Posted by JDNSW

Has anyone even tried to work out what proportion of the economy is complying with meaningless red tape - a lot of it trying to find out which bit of tape is applicable in any particular circumstance!

They certainly don't make it easy.

I just saw a 300TDI Defender's left exiting exhaust - it obviously doesn't meet ADR 42.8 and it was a '95.

in a non comercial registerd vehicle you can exit the exhuast from underneath the body work left right or rearwards providing its behind the rearmost opening in the side of the cabin work.

It must not face forwards or towards the ground at more than a 45 degree angle...

on a 110 like big red that means it can be anywhere behind the sliding rear window and must face out/back/down from there. (practially that limits you to behind the rear wheels)

ditto on a 90

on utes/dual cabs you can exit it in front of the rear wheels

the pipe must extend past the primary bodywork but not beyond the widest part/rearmost part of the vehicle (in my case the flares.

I'm sure the exhaust I bought from landrover last year didn't comply with that.

pics.

The ADR's dont tell the full story, there are different compliences for private, comercial, heavy, omnibus, specials, restricted use and on top of all of that there are minor changes from state to state...

Think of the ADR's as the minimum standard you have to hit to have a shot at it being legal and your wont go far wrong. Remember at the end of the day the ADR's are really guide lines for safety and how they read is up to the interpretation of the guy who does the checking on the day....

Is there an advantage to pointing the exhaust out the side?

Does straight back swallow too much dirt/mud/water when reversing or something?

As far as I can see the only advantage is to stop exhaust coming in.

A good example is when I bought my 2a, it was a full soft top - and the nonstandard (the seller had to do something with the front exhaust to get it registered in Victoria and it was rusted out anyway) exhaust, actually a somewhat modified S3 setup, pointed straight out the back; had a real problem with fumes getting in the back, fixed by bending the tailpipe a little so it pointed out the side about 45 degrees back.

Long since replaced with a standard 2a setup, straight out to the side.

In the case of a stationwagon, I can see little advantge either way, except straight back or down at 45 degrees would probably let a little less noise inside.

John

Ben, when mine bit the dust, I had my local exhaust guy knock up a 2 1/2" straight through system. Worked a treat. I used a 2 1/2" Lukey sport muffler in the same location as the original and also fitted a s/steel flexi section near the front. More power, nice deep note and sounds like an old stationary oil engine when idling. Cool!

Cost about $350, plus about $120 for the muffler and flex coupling

KhunMoo