New RTA rules for vehicle modifications

[TheStitt]

Champion stu..

thanks for that. Not sure why I couldn't find it.

[old_mr2]

Hi, you couldn't find it because that RTA website is incredibly difficult to navigate!

[oldcorollas]

Roads and maritime service

took me a fair few clicks to find it also.. shitful site it is now... thanks to the lib gumbys for making shit worse..
soon we will have "one stop" service centres for everything to do with government... yay

anyway, the list doesn't look that different to before? maybe a few of the dodgy kents have been dropped?

[old_mr2]

BoB McKay has been dropped (Newcastle), but he has retired. Good to see he has been replaced by another chap in beresfield so a couple of options up this way.

[The Witzl]

I've been doing some ring arounds this morning, and besides not being able to get thru to most guys in my area, one guy (Keith Knapp) said he didn't touch newer (>70s) cars cos of the adr deal with brakes needing race track testing under the new proof of compliance requirements.

Then I called consulmotive. John is actually helpful and doesn't require stupid tests on the brakes like some guys want. ill report back once I get some work done.

[TheStitt]

sweet what is he like with wheel track???

[The Witzl]

He's pretty tight on rules... Max increase is 25 a side up front and 30mm at the back iirc.... But if you are using axles from another car, then u can refer to the donor cars track width.
He is a little picky on wheel size too, but that's on a corolla so on your crown might not be such a big issue.

Eg, I have Volvo 240 rear and XT130 corona front struts, so that's my baseline.
I'm only going to 14" ma61 wheels on my ke70

Give john a call Stitty. His mobile number is on his website, just google consulmotive

[TheStitt]

yeah no worries..
I thought it was 25mm total... therefore 12mm a side.

I blow the hilux axle track out of the water 27mm track change a side. However the crown track is spot on

[oldcorollas]

regarding wheel changes only. 25mm track total.
same for replacement axle, but 25mm is based on the replacement axle.

http://www.rta.nsw.gov.au/registrati...vsi09_rev4.pdf (i believe this is still current)

An important requirement for all replacement wheels is that the wheel track must not be increased by more than
25mm beyond the maximum specified by the vehicle manufacturer for that vehicle.
Where non original axle or suspension components are fitted, the offset of the wheel in relation to the axle or stub
axle assembly used shall not be increased by more than 12.5mm each side of the vehicle based on the specifications
of the axle components used. If an axle assembly is shortened then the track width limit is taken as the axle
manufacturers original track dimension, less the amount the assembly has been narrowed, plus 25mm.
If you are contemplating fitting non original axle or suspension components you should seek the guidance of a
signatory as engineering certification will be required (see page 3).

if the current rules have not changed recently, there was a bit of a grey area..
it said +25mm based on replacement axle, but did not specify that the replacement axle had to be within X of the original track.
also stated that there was no limit to the size of "flares" used to contain wheels, as long as they did not pose a danger to peds.

so my interpretation was that as long as gingerbeer is happy with your replacement axle width relative to original car... all is sweet

NCOP tightens it up and states something about original vehicle track, but also mentions the +25 of replacement axle. that could be an issue.

regarding wheels.. "wheels" less than 26mm wider than biggest man. option are owner cert. (assuming wheels means rim?)
page 3 of that PDF shows maximum engineerable RIM width


i'm hoping to push the limits a bit.. eventually... but if you call John, can you quiz him on that?

[oldcorollas]

see bottom of Cruz's first post here for the NCOP bit on vehicle wheel track
http://www.toymods.org.au/forums/tec...op-thread.html
I'm hoping that does not also cover replacement axles

[TheStitt]

That’s what I was led to believe and is why I want to change engineers my engineer that originally did the wagon didn't like the sound of my new billet wheels, due to the offset change on the hilux axle.

My issue is that I have a hilux axle. All Hilux's run the same size diff bearing so therefore can cope with the same bearing loads. The lowest offset Hilux is a 90's Surf @ +4mm so therefore I can go to -8mm offset wheels and not affect the track. However I have -23mm wheels so have decreased the track by too much.

I just want to find a engineer who with common sense will see that the old girl isn't going to load up the bearings as much as a 4WD lux with 44s that goes rock hopping. An engineer that will engineer the wheels sizes and tyres sizes on the car as that’s all the cops care about.

In all the years I've been pulled into random car spots, they never ever pull out a tape measure and measure the wheel track. All the do is read the tyre sizes and if that matches the cert you are sorted..

[The Witzl]

Give consulmotive a call Stitt, cos its a decrease in track width I think he might have more to work with.
I seem to recall that you can reduce track more than you can increase it.

Make the phone call, get the answer buddy.
0412 253 973

[RiceburnaGTV]

Yeah JOhn was awesome when I dealt with him all those years ago when the riceburna was ready to be registered