Thread: Tail pipe design

Just get one made. the pipe will be about $10

yes, i ran mine between the rails like a tdi defender, all tucked up. I had to chop up the firewall and passenger floor though! The origional is very vunrable to rocks and mine always seemed to rattle on the sidestep or the rear tub.







When i first stuck the turbo on, i had about 6' of 3 inch radcoflex (flexable truck exhaust) with it poking out the side below the passenger door. It wasn't as noisy as you would expect as the turbo muffles the sound heaps. I drove around with this setup for a few weeks while i made the current one up.



Andy

Andrew was there much difference in noise after the muffler was fitted?

Ben you can just take it off and take it to a pipe bender. They will copy it exactly for you. You can knock the flanges off the existing pipe and reuse them, just need the get the end flared after putting on the flanges.

My question is more about any tail pipe routing options.



Being muffler-back, there's not a lot of options, but I was thinking if I'm getting something bent, I could do something like UKLRO's poking out the side panel. I think my tail pipe might rattle too much.

Originally Posted by rar110

Andrew was there much difference in noise after the muffler was fitted?

hell yeah, i can hear all the Ticks, squeeks, whines, rattles, vibrations, tyre growl so much clearer now, i want to remove the bloody thing! Seriously, its petty dam quiet, the muffler does its job well and the tailpipe is pointed at a 45 towards the road, which stops it deflecting off concrete armco, and buildings. Well worth the hassle.


Ben i wouldnt exit it through the 1/4 pannel like the poms do, you'll have soot sprayed up one side to match the diesel sprayed up the other (actually does anyone else leak diesel from their filler?). It also makes it really noisy when passing buildings and stuff.

Andy

Unless I am mistaken in NSW the exhaust is required to exit behind or at least right at the back of any passenger compartment, which does limit your options. But pointing the exit downwards would probably reduce noise somewhat - I know I would be interested in reducing exhaust noise in mine.

John

Originally Posted by JDNSW

Unless I am mistaken in NSW the exhaust is required to exit behind or at least right at the back of any passenger compartment, which does limit your options. But pointing the exit downwards would probably reduce noise somewhat - I know I would be interested in reducing exhaust noise in mine.

John

From Qld. Transport:-

"Exhaust systems must continue to comply with relevant legislation or Australian Design Rules."

"The exhaust outlet must extend at least 40mm beyond the furthermost outboard or rearmost joint of the floor pan that is not continuously welded or permanently sealed which could permit direct access of exhaust gases to the passenger compartment, but not beyond the perimeter of the vehicle when viewed in plan"

"The exhaust outlet, if to the side of the vehicle, must discharge to the right hand side of the vehicle and downwards at an angle to the horizontal of not less than 15 degrees and not more than 45 degrees."

"The exhaust, if to the rear of the vehicle, must discharge at not more than 10 degrees above or 45 degrees below the horizontal."

The relevant ADR is 42.8 Exhaust Outlets.

42.8.1, which mentions the 40mm and angle of discharge, doesn't apply to our omnibuses.

This next one does: 42.8.2 Omnibuses (MD and ME Vehicles)

42.8.2.1 the exhaust outlet must be as near as practicable to the rear of the vehicle;

42.8.2.2 except in the case of vertical exhaust systems, the exhaust outlet must discharge rearwards or to the right of the vehicle, either horizontally or at no more than 45 degrees downwards, and must not extend beyond the perimeter of the vehicle when viewed in plan; and

42.8.2.3 Does not apply in this case, it's to do with vertical outlets.

That said, ADR 42 applies to omnibuses manufactured on or after 1 July 1988.

My compliance plate doesn't list ADR 9 (which I think then became 42 'General Safety Requirements'). I'm still trying to find out what specifications the exhaust must meet.

I'd like to tuck the exhaust tip out the way, and I also wouldn't mind directing the exhaust away from the left - the street parking here usually results in the tail pipe pointing at the curb side seating of the local cafes and restaurants.