I am using the stock Hitachi setup at the moment. It is quite good with performance and I can flog the car the whole day without the needle of the fuel gauge dropping at all.

Why do you guys prefer Dellortos?
I have a set that have wear in the actuator pump arm. (That arm with the spring around it going down between the throttles in the centre of each carb).Apparently Webers have less moving and wearing components. I have'nt used the Dellortos yet, but just thinking about this worn parts and struggling to get replacements they are utter crap in my eyes.
Rather go Webers then.

I havent tried the webbers, just everyone has always told me that there better, and that is what my ute had on it when I got it...

P.S.... I use a ####LOAD of fuelllll..... mind you the exhaust smells great... lol

when you say the su/hitachi carbies perform well... how well you talkin and how much different you talkin if you set up a pair of su carbs on a a14 then swapped them with a set of webbers. Ball park so i know if its worth all the trouble. sorry just have no idea bout these old school little engines.(still learning)

Do what i did. Covert the 1 1/2 su's to 1 3/4. Im getting far better fuel economy, driveability and plenty more performance than the 1 1/2s ever did plus they flow near the amount of twin 40 webers. All the benefits of Su's with the performance of webers.

thanx mate yuo have given me the most help... cheers. Do they bolt straight up to the old manifold and how much did you have to spend.

I guess the twin SU's really saves fuel when you dont step on the gas pedal because it has variable venturi's....compared to a large fixed venturi of a weber. I read abt this somewhere before...

I'm a big fan of Hitachi SU's for a street engine. they're smooth, economical and very tuneable.

they'll never be able to match Webers for outright performance though - they simply don't allow you to use really serious cam specs.

but if you just throw a set of webers/delloros/mikunis on an engine to replace SUs, don't expect much, if any, performance improvement. do expect worse fuel economy.

L18 has hit the point "just throwing a set on" is what creates a lot of the negative impressions of these carbs. Webers are exremely tunable - choke sizes, aux venturies, emulsion tubes, pump bleeds etc etc etc. Typically they are tuned for WOT, with scant attention paid to the rest of the details. These details can make the overall package quite efficient (and you still get the glorious sound of a Datto breathing through Webers!)

Then I also need to drop a few questions in here if the original poster don't mind.

I am currently looking for a set of sidedraft webers to throw onto my stock A12GX motor. I am planning some work to the head but still use the standard GX cam as I am too lazy to pull out the block to change cam.

MAYBE later when funds permit I will do the engine but for now just the carbs.Am I wasting my time and money? I am happy with the Hitachi SU's and enjoy flogging it a little to 5000rpm and see the fuel gauge not making much of a change.
Maybe I must use the money that I am gonna spend on the carbs to rather do a proper job to the cylinder head.Think I will see more performance with head mods than just changing the carbs.
What do you guys think?
Main reason for wanting webers is that roaring sound.I one night went for a spin in a A14 with lots of works and sidedrafts.
Ooooh, that sounds was glorious.

i just chucked a pair of dellortos on my L20b to replace the SUs, motor had extractors but was otherwise stock....wouldnt say you dont notice a difference
cant say they used noticably more fuel either

just my experience though