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As the title says i think it would be a good idea to compile a list of what is a legal modification and what is not............ and i'll update the first post accordingly to keep it all easily excessable.

BOV - Legal if plumbed back

BOV - Illegal if vented to atmosphere

Large Injecters - Illegal

Piggyback ECU - Illegal

cheers, for you help!

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Injectors and ecu? really? Why?

Different to OEM; therefore potential emissions issues. I believe that ECU's can be engineered, but I think they have to have a "Security Code" locking out modifications to the tune.

Nothing stopping you from having a code; don't see the point though.rolleyes.gif

Here's how I see it.

Standard or standard equivelent = Legal

Anything else = Iilegal and your a hoon.

The "rules" are so hazzy atm. There is a new engineering statutory in place, but no specifacations onto the changes and how it affects "car enthusiasts" (i.e hoons, f**king ACA dream boats).

http://www.infrastructure.gov.au/roads/vehicle_regulation/bulletin/vsb_ncop.aspx

This is the source. There is too much rubbish floating around online about mods and legality etc. This is from DOTARS, and for example, I'll take an excerpt from the "Engine" section. By Certification, it means inspection and certification under state road/traffic authorities Ie in NSW, that would be VSCCS after they made "engineers certs" defunct.

This must be read in conjunction with the ADR's.

1.1 BASIC MODIFICATIONS NOT REQUIRING CERTIFICATION

The following are Basic Modifications that may be performed without certification providing the

modifications are carried out in compliance with the requirements detailed in Clause 2 General

Requirements:

 Fitting a replacement new, used or reconditioned engine;

 Fitting a manufacturer’s optional engine together with any associated components as

supplied by the manufacturer for that same model vehicle;

 Fitting replacement original equipment engine and exhaust components;

 Fitting replacement original equipment, equivalent or better, components that have no

influence on engine performance or emissions (e.g. higher volume oil pump than original);

and

 Fitting equivalent engines with an increase of up to 20% of original power.

In all of the above cases, if the engine is modified, it must be certified under the relevant Code

of Section LA.

1.2 MODIFICATIONS REQUIRING CERTIFICATION UNDER LA CODES

The following is a summary of modifications that may be performed under Section LA:

 Fitting engines greater than 120% of original power and/or engine mass;

 Fitting performance engines;

 Fitting engines from non original equipment sources;

 Installing a supercharger or turbocharger; and

 Modifying the engine and engine components that results in an increase in engine power

of more than 20% and/or affects exhaust emissions.

I'm stuffed then!....^ all over the above for me

I think we will ALL be stuffed.

The bit about engine replacement is con fusing.On the one hand it says I can fit a 25DET to replace the DE, Then it says I cant have an engine with more than 20% extra grunt.

I wonder how all the N/A Skyline guys get on when turboing their DEs.

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