I'm really sorry Ben that was all over my head all those codes didn't make much sense to me.

Can you maybe take the time an explain it in a little more detail for me?

Thanks

Australian design rules - see

http://www.classiczcars.com/forums/showthread.php?s=&threadid=7459

for a breakdown

:classic:

Basically its easier to build an earlier car/motor as you have less stringent ADR's to comply with, emissions being the key word.

I think I have a link to the ADRs at home.

AAhh.....just had a look at Ben's link, wonder if its going to be possible to get a roadworthy on my 1977 with 240Z carbs.

If it looks stock & you have an ignorant inspector, anything is possible.....

Or if you have a couple extra $50's

No one wants to have much to do with issuing a certifcate for a 260Z though...too much liability i guess.

Back on topic, the EGR gear etc required for the later motors, is it really of any major restriction?

As for engine internals, who would know.

Chances are that the EGR plumbing is completely blocked with carbon deposits....

However, if it is functioning 100% correctly, it will not hurt performance at all & will make the engine cleaner at light throttle openings.

My FJ20ET has a fully functional EGR system & still goes like a rocket while using 10L/100km.

The air-pump is another story & in reality doesn't make the engine any cleaner, it just dilutes the tailpipe emissions. An appropriately sized exhaust leak would have the same effect.

On top of that, it sucks HP from the engine & weighs heaps. If at all possible, get rid of it.

The easiest way to get away from the air-pump is to fit a L28E to the car....

(the real late model L28E's won't have EGR either)