There are many off-the-shelf parts for A12 EFI. Most use a DCOE carburetor manifold, but don't use the carburetor itself instead use a pair of dual-ITB (individual throttle bodies).

See EFI for photos and parts. A decent EFI computer starts at 200 kit. You could also use a stock Nissan computer from the wreckers.

unless im sure they will fit a a12 motor i would not be confident in this. but that is exatcly what imn after though

Here are some cheap setups, it's up to you to make sure they are the right bore size etc. I'd think anywhere between 30 and 36 would suit a mild A12, for a worked A12 I reckon 36-40mm and for bigger capacity worked A14 or A15 then 40-46mm should do the trick (you should do your own research really maybe send lagwagon a text about his setup).

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cheers mate good info just wish there were off the shelf n avalibilty in parts lol..

Well there's a fair bit to it than just that but sure that's the general idea.

If you are going to go through the effort of building a manifold you might want to go with the oval port head as these are a better performer than the round port. Probably one of the best upgrades you could go with.

So if you build the manifold to suit the oval port head you'll save yourself having to do that modification later.

Chris

yeah that looks very neat, so basicly if i but a decent efi set up get someone to fab up some manifolds all should be sweet?

TB = Throttle Body.

No single isn't better but it also depends on what you want.

If each pot has it's own throttle body the potential for producing more power is much greater, then you have to sort ignition and cam and exhaust.

I reckon you're going to have to fork out about $3000.00 for a DCOE EFI setup (inc. computer, injectors, linkages etc etc)

Don't mean to drag lagwagon into it all the time but his setup would have cost a fraction of that because he used cheap quad throttle bodies (motorbike) made a manifold and built his own computer.

sorry bor asking a nob question but whats TB
and is single better than twin?

You'll have to make a manifold as a twin downdraft weber manifold for A series doesn;t exist

For tunability 1 tb for each pot is best... especially if playing with huge cams

it will become my daily when the wife gets her leicence back and at the same time want the power there for going up hills and when i need to let off some steam..

and combos i can use like efi webber size, manifold,