what do you guys think would be a better set-up.... 2 identical 'worked' a-series, 1 with twin 40mm webers/dellortos (perfectaly tuned) or 4 motorbike style carbs (also perfectaly tuned)? i would like 2 know which is a better set up before i blow a big wod of hard earned cash.........

that's like asking if a microtech or a wolf is better when converting to EFI...!

they'll both do the job fine, just the bike carbs will need a custom manifold or adaptor.

lots of people around to tune both.

remember, bigger isn't always better when it comes to choke size. even big webers (45DCOEs etc) are choked down.

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Well, if you've ever driven similar cars....one run with a microtech and one with a haltech, you'd know that this is definately a relevant question. They may both do the job fine but one does it far better than the other.

Although I suspect you won't see much difference between a weber and a high-quality bike carb.
Maybe a bit better throttle control with the bike carbs due to the slide throttles??????

I would say the bike carbs any day for driveability, but for 4 Mikuni HSRs you will be paying over $2000 aussie.
If you could find something else with a 40mm+ bore to get the top end(remembering our datsun engines are generally bigger than most bikes you would be getting the carbs off) I would think you would be onto a good thing.

i didn't mention anything about a haltech.

i said "microtech" and "wolf".

a similar scenario would be "autronic" and "haltech".

of course there would be a huge difference in the driveability of a haltech and a microtech - hence why i didn't compare the two.

at the last rally i went to, i saw a 1600cc cortina kent with 2 ( yes i saw correctly) downdraught bike carbs, pretty wild cam, ported head and a full exhaust, and the owner said it flowed perfect at high revs, and it out performed his single 40mm idf weber he had on it before, but he wasnt keen on telling me what bike the carbs came off .............

Cabridge,I am sure you did see correctly , there are pics on this site of setups like that.(two motorbike carbs)
It is the same concept as twin SUs.They can work great.
I had twin Hitachis on an A15 for years and they never needed the slightest adjusting.
I also had quad bike carbs on the A15 for about two years.
But for all out power I went for twin webers.
If I had the money I would get four HSRs in a flash.

i didnt think bikes had downdraught carbs, and it was the fact that it was on a 1600cc engine with only 2 carbs, eh. so two bigish bike carbs are as good as a single weber?

I didnt think bikes had downdraughts either.
I only know about the variable venturi SU type.
But yes I think two would be as good as a single sidedraught weber.

AS GOOD or better?? would it be worthwhile going and buying 2 carbs, adapters and linkages or just getting a weber?