yeah i think i might have to get another person's perspective on it, maybe take it to a Datsun Specialist Mechanic in Sydney, Cheers for that definately take it in to consideration

That's cool, don't get me wrong I had 45's running on a little A12, they were choked down to 36mm though. So to try and make the engine more streetable I ended up dropping the carby's to 40mm's and installing 31mm chokes within those carbies. The smaller bore boosts the speed of the incoming air volume making the carby mix fuel more efficiently and thus providing a smoother better running engine. Well that's the basics of it. You might be spot on going for 45's seeing as it's a 1.65 litre, what do other people think?

But I'll tell you one thing, engines with big bore induction are an absolute pig (EDIT: Big bore induction + heavily modified internals + components). I couldn't even get this thing up the hill near my place off a rolling start even though it would thrash along quite happily along the street.

Here it is running like an absolute dog:

http://www.youtube.com/user/TheDatsun ... re=mhee#p/u/8/0xmYETWsjjI

This is how it sounds now with the carbies all tuned and downsized. Much more controlled.

http://www.youtube.com/watch?v=qOA7X0saNfM

i would have to get the full list of all the modifications, and ill post it up here and maybe you can tell me if it needs that much mm, personally when he told me all i could think of was all that fuel not getting burnt LOL

SOLD! to my mate

Is this definetly done? I am interested.

pretty cool setup mate, could you tell me if thats a mitsubishi or a nippon denso alternator on it please? and if possible the number on it ?

the alternator is from a mitsubishi triton, 80 amp, that's what the guy who sold it to me told me, straight bolt in apparently

Big carby bores require a high piston speed to get enough air velocity, otherwise when you push the throttle at low rpm it will just go nowhere.

So this has def been sold???

definitely been sold, just dropped off to his house today, sorry mate.