A310 Carburettor change

Dear all
I'm investigating a strange solution, this is my idea:
if I would to replace original carburettors of my A310 I saw that Weber DCNF 40 or 42 are very rare and expensive (triple vertical one I think it is impossible to find if I do not dismount from a old Porsche 911 ).
So, maybe, it is possible to use motorbike carburettors with similar diameter and more compact (for sure), maybe with some modification in order to adapt to car.
I'm able to design and make a manifold for connection between engine and carburettors but maybe I'm negletting something,
why carburettors for motorbike 4 strokes and for cars are so different?
Please give me your opinions
...
maybe I'm trying to complicate my life...

...I add same pictures of what I'm speaking

for example 3 of these

double-kehini-43-KTM.png

double-kehini-43-KTM2.png

or 2 of these...cutting 1 carb...

Yamaha-carb-D40.png

very unexpensive because Yamaha R1 carburettors are very common

I found on ebay sameone that sells manifold for R1 carburettors to fit a Ford engines

example-Yamaha-carbs-for-Ford-RS.png

http://www.ebay.it/itm/Ford-RS2000-I4-D ... 1690450173

https://drive.google.com/file/d/0B6HvwR ... ef=2&pli=1

personally motorbike carbs are waste of time on large capacity engines & will always have various running issues at low engine speeds.
I think JLE done a Holly carb conversion that works well.

ok for Holley carbs but I think they are not able to reach a huge increment of power
wich is dimensions of Holley venturi?

btw I think with right carburettors (D40-42) and the right exhaust it is possible to reach 175-180hp with 2.7L

maybe 200hp with improvements of the engine head and cams...

The holly is well over sized for engine and is easy to tune and is reliabale, the restriction is the inlet manifold and all the rest.

[Alpineandy]

As Custard says, the limit is not the carb.
The limits are the inlet manifold but even more cylinder head.
No point considering anything more than a Holly unless you have found a way to improve them in a very very major way...

ok
how much does it cost?

Holley with kit I mean...

[Alpineandy]

how much does it cost?
Holley with kit I mean...

Ask Mr Dell or JL Engineering (ragnottidrift) for an exact figure but I think it's around £1000 for the full kit.

viewtopic.php?f=2&t=7127&p=75502&hilit=holley#p75502