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Location:
Brisbane
Registered:
June 2003
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I supported Toymods
Banned User
Location:
Brisbane
Registered:
May 2002
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Re: Legality of Side-exhaust mounting?
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Sun, 28 November 2004 12:36
 
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You used to be able to exit them out the drivers side, but now I dont think you can have them at all.
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Location:
Brisbane
Registered:
June 2003
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I supported Toymods
Banned User
Location:
Brisbane
Registered:
May 2002
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Re: Legality of Side-exhaust mounting?
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Sun, 28 November 2004 12:40
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Yeah ring RTA Mods dept.
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Location:
vic
Registered:
November 2002
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Re: Legality of Side-exhaust mounting?
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Sun, 28 November 2004 12:41
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think they must be a certain distance back from the window/s?
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Location:
Brisbane
Registered:
June 2003
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Re: Legality of Side-exhaust mounting?
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Sun, 28 November 2004 12:43
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yeah, theres a fair way to the rear arch on an ma61 too.....
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Location:
Brisbane
Registered:
June 2003
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Re: Legality of Side-exhaust mounting?
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Sun, 28 November 2004 12:45
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how about dumping them before the diff? under the car..anyone know if thats legal?
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I supported Toymods
Banned User
Location:
Brisbane
Registered:
May 2002
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Re: Legality of Side-exhaust mounting?
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Sun, 28 November 2004 12:49
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| V8_MA61 wrote on Sun, 28 November 2004 22:45 |
how about dumping them before the diff? under the car..anyone know if thats legal?
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No, Its not.
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: Legality of Side-exhaust mounting?
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Sun, 28 November 2004 12:52
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NSW it's "rear of the last door/window opening, for the obvious exhaust dying thing 
it is much more socially nice to have them going out the back of the car... a few nice mandrel bends should work... or channel the floors/boot to fit....
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Location:
Brisbane
Registered:
June 2003
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Re: Legality of Side-exhaust mounting?
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Sun, 28 November 2004 12:55
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yeah but as i said...theres not much room at the back of and ma61..and there'll be even less if i decide to go with the big diff....
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Location:
Montrose, VIC
Registered:
May 2002
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Re: Legality of Side-exhaust mounting?
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Sun, 28 November 2004 13:05
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Plus, done right, it could be pretty fat...
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I supported Toymods
Banned User
Location:
Brisbane
Registered:
May 2002
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Re: Legality of Side-exhaust mounting?
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Sun, 28 November 2004 13:06
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| V8_MA61 wrote on Sun, 28 November 2004 22:55 |
yeah but as i said...theres not much room at the back of and ma61..and there'll be even less if i decide to go with the big diff....
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Your doing something wrong then. If I can fit a 3 inch out the back of the TA22 with the hilux diff, you can fit a 3 inch out the back of anything.
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Location:
Brisbane
Registered:
May 2002
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Re: Legality of Side-exhaust mounting?
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Sun, 28 November 2004 13:07
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Well if you want it street-legal you don't have a choice; as oldcorollas said, the exhaust outlet has to be behind any door/window openings, so on an MA61 that means the very back of the car. If you can't fit two 3" pipes on the LHS of the car, you should be able to merge them into a single 4" pipe just before the rear crossmember. Any flow restriction will be negligible by the time it's got to the back of the car.
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Location:
Brisbane
Registered:
June 2003
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Re: Legality of Side-exhaust mounting?
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Sun, 28 November 2004 13:08
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interesting re the merge into 4"...might be the way to go...no lowering for me!
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Location:
Adelaide
Registered:
May 2003
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Re: Legality of Side-exhaust mounting?
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Sun, 28 November 2004 20:59
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Just jig it up after you have lowered the car, that way you can run it under the diff rather than over.
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Location:
c'town, NSW
Registered:
May 2002
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Re: Legality of Side-exhaust mounting?
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Sun, 28 November 2004 21:29
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takai its IRS it will be going under anyway
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Location:
Adelaide
Registered:
May 2003
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Re: Legality of Side-exhaust mounting?
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Sun, 28 November 2004 21:39
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Ahh, i read MA61 and thought live axle. Teach me to be posting at 8am.
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Location:
sunny coast, qld
Registered:
October 2002
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Re: Legality of Side-exhaust mounting?
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Sun, 28 November 2004 21:43
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| Norbie wrote on Mon, 29 November 2004 00:07 |
Well if you want it street-legal you don't have a choice; as oldcorollas said, the exhaust outlet has to be behind any door/window openings, so on an MA61 that means the very back of the car. If you can't fit two 3" pipes on the LHS of the car, you should be able to merge them into a single 4" pipe just before the rear crossmember. Any flow restriction will be negligible by the time it's got to the back of the car.
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Does this mean that in a sedan, if the rear doors are permanently closed, (welded) that you can then run the exhaust out just behind the driver's door?
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Toymods Club Treasurer
Location:
Sydney
Registered:
May 2002
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Re: Legality of Side-exhaust mounting?
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Sun, 28 November 2004 22:29
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I would like to know what engine you're running that needs to have 2 x 3" exhausts?
Thats 14.1 square inches of area
2 x 2.5" pipes have 9.8 square inches
So, the 3" have 1.4 times the area of these.
1 x 4" has 12.5 sq inches
If you really want this area, maybe try multiples of smaller pipes (3x 2.5" has 14.7 square inches) & merge back again after the diff.
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Location:
Brisbane
Registered:
June 2003
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Re: Legality of Side-exhaust mounting?
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Sun, 28 November 2004 23:59
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| wagonist wrote on Mon, 29 November 2004 08:29 |
I would like to know what engine you're running that needs to have 2 x 3" exhausts?
Thats 14.1 square inches of area
2 x 2.5" pipes have 9.8 square inches
So, the 3" have 1.4 times the area of these.
1 x 4" has 12.5 sq inches
If you really want this area, maybe try multiples of smaller pipes (3x 2.5" has 14.7 square inches) & merge back again after the diff.
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Worked v8...
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Toymods Club Treasurer
Location:
Sydney
Registered:
May 2002
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Re: Legality of Side-exhaust mounting?
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Mon, 29 November 2004 00:24
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Yeah, but they only tend to put 4" pipes on really worked GTR's & Supras running 30psi.
Unless you're putting out 600 or 700hp, I really doubt you'd need this kind of airflow.
but each to their own...
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I supported Toymods
Location:
Australia
Registered:
November 2003
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Re: Legality of Side-exhaust mounting?
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Mon, 29 November 2004 00:35
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| rob_RA40 wrote on Mon, 29 November 2004 05:29 |
takai its IRS it will be going under anyway
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Not if/when he converts to 9"
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Location:
Brisbane
Registered:
February 2003
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Re: Legality of Side-exhaust mounting?
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Mon, 29 November 2004 00:41
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| Chris Davey wrote on Mon, 29 November 2004 07:43 |
| Norbie wrote on Mon, 29 November 2004 00:07 |
Well if you want it street-legal you don't have a choice; as oldcorollas said, the exhaust outlet has to be behind any door/window openings, so on an MA61 that means the very back of the car. If you can't fit two 3" pipes on the LHS of the car, you should be able to merge them into a single 4" pipe just before the rear crossmember. Any flow restriction will be negligible by the time it's got to the back of the car.
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Does this mean that in a sedan, if the rear doors are permanently closed, (welded) that you can then run the exhaust out just behind the driver's door?
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the engine's NA - so where the headers collect you'll have 4" each side - but once that's fed into 1 (or 2?) resonators under the car, you'd think that a 3 1/2" or 4" thru to the tail muffler would be adequate flow?
i think if you had 2 big-arsed pipes under the whole length of the car, you'd have way too much pipe resonance to make driving a fun experience? even if the amp in the back is going 110% 
chris: my understanding was that it had to be behind the rear-most window not just rear-most door - but usually it has to be out the back of the car. You might be able to exit after the wheels along the side of the car?
Cool1's getting his setup built by the engineer (who came across as a very thorough dude) so i'd guess that his setup would be the most legal.
i think dual 4" pipes would have very serious bark to them as well so the car (specially if v8_ma61 paints it lime green!) will be a driving defect magnet 
why not have two setups - track & street?
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I supported Toymods
Banned User
Location:
Brisbane
Registered:
May 2002
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Re: Legality of Side-exhaust mounting?
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Mon, 29 November 2004 00:46
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| wagonist wrote on Mon, 29 November 2004 08:29 |
I would like to know what engine you're running that needs to have 2 x 3" exhausts?
Thats 14.1 square inches of area
2 x 2.5" pipes have 9.8 square inches
So, the 3" have 1.4 times the area of these.
1 x 4" has 12.5 sq inches
If you really want this area, maybe try multiples of smaller pipes (3x 2.5" has 14.7 square inches) & merge back again after the diff.
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Its because he has a small penis and he needs to compensate!
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Location:
Sydney
Registered:
February 2003
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Re: Legality of Side-exhaust mounting?
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Mon, 29 November 2004 01:01
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hmm well last time i checked with the rta, i was told that the window rule is bs, and there are no rules... 
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Location:
Campbelltown
Registered:
November 2003
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Re: Legality of Side-exhaust mounting?
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Mon, 29 November 2004 01:03
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It has to be on the drivers side thats the only rule i know. cos in one of my street commodores mag a guy has a side existing exhaust and has a dummy one set up on the passenger side for symmetry and rice factor and has to explain to the cops that it is fake.
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Location:
Brisbane
Registered:
May 2002
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Re: Legality of Side-exhaust mounting?
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Mon, 29 November 2004 02:51
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The information I posted earlier comes from an actual engineer in Qld, it's not something I pulled out of my arse. So unless the rules have changed in the last couple of years, the exhaust will have to come out the back of the car. The rules may be different in NSW but Blake is in Qld.
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Registered:
November 2002
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Re: Legality of Side-exhaust mounting?
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Mon, 29 November 2004 04:30
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WA licensing (about the loosest in Australia) forbids side exiting exhaust systems (aka lake pipes apparently) and states the all systems must exit behind the rear axle line. It also dictates the direction the pipe should not face, towards the nearside kerb.
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I supported Toymods
Location:
Australia
Registered:
November 2003
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Location:
Perth,western australia
Registered:
December 2003
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Re: Legality of Side-exhaust mounting?
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Mon, 29 November 2004 10:55
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if the car comes with side exiting exausts form the factory they are legal.
theres a corrvette builder next to my work,and some corvettes come with them.
not much help but i thought it was interesting and on they corvettes they look damn good.
no need for a radio at my work.i listen to V8's all day...
Dom
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Location:
Brisbane
Registered:
June 2003
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Re: Legality of Side-exhaust mounting?
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Mon, 29 November 2004 13:14
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ill call the rta and find out for sure...thanks guys
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Location:
Brisbane
Registered:
May 2002
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Re: Legality of Side-exhaust mounting?
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Mon, 29 November 2004 14:56
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The RTA is in NSW... I think Qld Transport is the department you're thinking of. 
But I wouldn't recommend talking to them, you'll end up talking to some bored public servant who doesn't know shit and will just make something up to get you off the phone (been there, done that). Have a chat to an approved engineer, they have a better technical understanding of the legal requirements and will actually talk to you about the issue and help you find a solution.
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: Legality of Side-exhaust mounting?
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Tue, 30 November 2004 00:54
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| STR8 2.8 wrote on Mon, 29 November 2004 12:01 |
hmm well last time i checked with the rta, i was told that the window rule is bs, and there are no rules...
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from the NSW "Code of Practice of Light Vehicle Modification"
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Exhaust systems shall provide a minimum of 100mm ground clearance and where ADR43/-- applies, also meet the ground clearance requirements of this rule.
The outlet of an exhaust system must be rearwards of any passenger side entry doors and any unshielded part of an exhaust system other than the outlet may not protrude beyond the profile of the body other than on the underside. where ADR42 applies, exhaust outlets must also meet to requirements of section 42.8 of the design rule.
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but thats in NSW.
Cya, Stewart
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Location:
Northwestern Sydney
Registered:
August 2002
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Re: Legality of Side-exhaust mounting?
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Tue, 30 November 2004 01:48
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In NSW the exit must be behind the last operable door/window and exiting on the drivers side.
This was from the engineer of a 2004 Tarago that has had the exhaust modified to come out the drivers side just behind the last opening window about 2 months ago.
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Location:
Canberra
Registered:
June 2003
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Re: Legality of Side-exhaust mounting?
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Tue, 30 November 2004 02:36
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If you were in the ACT then your exhaust could exit out either side as long at it´s 9 inches (how´s that for up to date laws) behind the most rear most opening feature (door, or window). On a RA23 that meant i could just sneak ina decent side system...bloody loud though.
The killer with side systems is generally the ground clearance as you still have to meet the minimum 100-120mm as the lowest part of the body.
As for needing twin 3 inch in n/a form, not likely but if you can fit it then it´s not gonna hurt....just gonna be loud.
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Location:
Adelaide
Registered:
July 2002
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Re: Legality of Side-exhaust mounting?
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Wed, 01 December 2004 11:43
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i called some turd from the RTA in SA (regency) when i was looking at getting a side pipe for my MZ20, he told me it had to exit after the rear axle, behind the rear-most opening window and not protrude the vehicle more than 15cm. yet he would not write this down for me because he said most police officers disagree. thats why he is a turd
i got a side pipe any way.
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Location:
Sydney
Registered:
February 2003
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Re: Legality of Side-exhaust mounting?
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Wed, 01 December 2004 23:07
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| oldcorollas wrote on Tue, 30 November 2004 11:54 |
| STR8 2.8 wrote on Mon, 29 November 2004 12:01 |
hmm well last time i checked with the rta, i was told that the window rule is bs, and there are no rules...
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from the NSW "Code of Practice of Light Vehicle Modification"
| Quote: |
Exhaust systems shall provide a minimum of 100mm ground clearance and where ADR43/-- applies, also meet the ground clearance requirements of this rule.
The outlet of an exhaust system must be rearwards of any passenger side entry doors and any unshielded part of an exhaust system other than the outlet may not protrude beyond the profile of the body other than on the underside. where ADR42 applies, exhaust outlets must also meet to requirements of section 42.8 of the design rule.
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but thats in NSW.
Cya, Stewart
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well that just goes to show you should double check before believing and rta worker. thanks stewart 
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Location:
Tassie
Registered:
October 2003
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Location:
brisbane
Registered:
May 2003
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Re: Legality of Side-exhaust mounting?
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Thu, 02 December 2004 01:36
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I remember reading somewhere in QLD by laws that it must exit at least 1ft behind the rear most section of 'moving' glass... I don't have a link to the specs, but that is what I was told.
Trucks exit on the drivers side... I don't think they are allowed to exit on the pass side.
I was looking at doing this also. Instead went for a single 3.5inch split into twin 2.5's to gain groudn clearance...
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