Oh righto, I only knew of the Injection Perfection modules. I do remember those ones being advertised here though.

I reckon you could choke them down somehow. You'd have the benefit of having the manifold already(dcoe) if you went with the DCOE throttle bodies.

I'm not sure, you can argue that they're too big or just right but if you'd want a street driver I would have thought they were a little on the big side, but like I said it depends if you could choke them down or not.

Give it a go seeing you have the throttle bodies available.

EDIT: hang on, they have 40mm sets available... those would be fine, but the price?!

efi hardware is a shop they sell those quad throttle bodie setups http://www.efihardware.com/products/c57/4-Cyl-Throttle-Body-Kits i was thinking the throat id would be to big for a 1200cc engine and they look large in size. plus i got heaps of zx12 throttle bodies layin around

Sure they could. But they might inflate the costs a fair bit as well as the scope of work. What EFI hardware are you comparing to though? Not sure I follow what you are saying.

Keep in mind some really simple turbo setups have pulled very impressive results, in particular topgears A12 turbo draw through, he manage 100kw at the wheels, pretty impressive really.

do you think they could be applied with a turbo? i sorta figured they be better than the efi hardware becuase of there size

Yes rally1200 has.

He also has (in my opinion) one of the best knife edged crank shafts I have ever seen.

Quote:

has anyone tried adapting quad throttle bodies from a bike engine to an a12?

Have your thought about an engine dampner?

what about motorbike efi?

i have a twin weber manifold, but what fuel rail and injectors
the plenum is not a prob
i know the motor will do more but the carby is letting it down, not sure what to do

depends on the application. EFI is expensive and fairly complicated but the results pay off for a high performance engine as you can tune without limits or going through ten sizes of jets at $$$ per set.

for EFI on a budget you could use a double sidedraft manifold and get some injector boss's tigged onto it and then fabricate a plenum chamber to bolt to the side and just use a throttle body of any old jappa EFI 1.6L or larger but if you go too big you will have mad crazy throttle response which may not be desirable.

You will need a computer. I use a megasquirt which is alright but the link computer is much more supported as far as tuning companies etc but is grossly over-specced for a datsun a-series tech engine. A megasquirt II v3.0 will be a good option.

So pretty much for EFI here is a list of requirements
~ manifold and plenum chamber
~ throttle body
~ the injectors and fuel rail
~ high pressure in-line fuel pump and surge chamber
~ EFI controller
~ wide-band lambda sensor
~ optional electronic distributor

new aftermarket computers use manifold air pressure sensors which eliminate the need for an air flow meter.

Ends up expensive but worth it in the end.