Bored/stroked Engine Legality? What Are The Qld Transport Rules About This?

[GTRNUR]

Hi all,

Im trying to find information regarding what is legal regarding increasing an engines displacement. Ive been reading a few threads on SAU, and aparently some people have had issues with getting RB30's approved in their cars as the RB30 is an older engine design than was supplied in skylines 1998 and onwards. (one of the patrols had a RB30 in 1998, so thats aparently the cut off date).

So what about over-bored and stroked engines? Where is the line drawn there?

I am sure that most owners would never admit to the authorities that they have a JUN 2.7, HKS 2.8 or apexi 2.9 kit in their cars, and from the outside it is not possible to detect these modifications. However, if it is illegal, is it not possible that the QLD transport authorities might want to test an engine and measure the combusion chamber somehow?

Ive looked at the QLD transport code of practice manual (I have a copy of the 1998 manual) and the sections on the engine only seem to relate to engine substitution (LA1) and fitment of forced induction (LA3). Is there more up-to-date details anywhere else?

Cheers,

Ian

Edited January 1, 2010 by GTRNUR

[zebra]

afaik, as long as the stroker kit doesn't exceed the max engine capacity of the vehicle and meets the emission standards than its ok.

dont quote me however

[joeyjoejoejuniorshabadoo]

this is going to sound blunt and rude, but its really the only way i can put it...

who the f**k cares...? you cant tell so f**k 'em

[GTRNUR]

afaik, as long as the stroker kit doesn't exceed the max engine capacity of the vehicle and meets the emission standards than its ok.

dont quote me however

Well after a lot more googling I finally came across this useful link on a V8 forum.

http://www.infrastructure.gov.au/roads/veh...n/vsb_ncop.aspx

These are the updated rules for everything modification related.

It turns out that a "conversion" upgrade for a skyline can be up to 3x the vehicle weight (in cc) under the LA1 table ruling, while still remaining a forced induction engine. The allowed CC is referred to as the swept volume so it is a bit of an assumption but it stands to reason that if the block remains the same yet doesnt exceed 4.8lt then its legal, so I think your right.

this is going to sound blunt and rude, but its really the only way i can put it...

who the f**k cares...? you cant tell so f**k 'em

Im just researching because someone that knows what to look for can spot a spacer plate engine. The whole point of what I want to achieve with my engine project is the engine must appear to be stock, or very close to it. I still want to know exactly what is legal and what isn't, just in case something is spotted.

After all if your going to spend $15-20K on an engine and were told you had to pull it out by the authorities you wouldnt be too happy would you?

[joeyjoejoejuniorshabadoo]

i see your point... but that's one mod i'd be 100% willing to risk

[R31Nismoid]

It'd be the same as anything else.

ADR/Engineering approval.

ADR's would require the emissions testing, engineering just the safety side of it.

This is standard across all states. The only variances are the state specific things.

IE. NSW lets you go about signifigantly less testing then VIC (ie not full ADR, but a rather easy test is OK for NSW).

You can't stroke a motor anywhere near enough to put it against motor size limits so forget those.