you can also long as the power output isnt higher then 20% of the original engine.....so to be sure then check specs from factory of your current engine to what you want to put in. if its greater then 20% then its illegal....but it shouldnt be....but if you mod it to have 250hp+ then it is illegal..but if you have that and more from your factory size engine...it isnt.
Modification PDF
Here's some info looking for the rest.
Ok found out the good stuff only its not that accessable I will post up the info when I get it in a few weeks.
I think legally you are allowed up to a 3ltr though I could be wrong, best to check out the modification laws on the Qld Gov site dude. It should have details of what size a car brought out with a 1.8 is allowed to have. It's either a 3lt or 2.5lt.
What about abrasion properties of the alloy? Will it wear out quicker then the cast??
I know its a high grade alloy but I guess it is something that will show up under longer testing.. If it does pose a problem maybe it might be worth while to work out if it is possible to treat the bearing surfaces etc. Again that may raise an issue with expansion and machining surfaces.
Just an idea Ranga man.
Champ.
Just remember that we need to know the number of people you have coming from the site and perhaps the northside crew so that we can let the catering know. So that there is enough food and drink.
Cheers.