I'm considering fuel injecting my 74 Kombi and thought I'd see how many people have done this and what their experience and results have been.
My bus currently runs a mild 2L, has a cam, exhaust and is running a pair of 44idf webers. It has good power but terrible fuel economy, somewhere between 20 & 25L/100km. Last trip to port Macquarie from Newcastle used a full tank each way.
I'm mainly looking for better fuel economy as we love taking the Kombi away on weekend trips but with fuel costing what it does we can't afford to drive it anywhere.
I'm looking at an aftermarket quad throttle body setup.

Off the shelf is expensive but motorbike throttle bodies and an ecu will be cheaper if you have the spanner skills.

$1500 should cover the diy option but off shelf would be double that plus. Rough top of head numbers but I know the megasquirt is the cheapest ecu option and throttle bodies can be cheap if you look around.

Fuel injection wont save you on your fuel bills Its the weight n cross section of the Kombi that uses the fuel

However FI would be better off in the long run

Go for a good computor like Autronic or Halteck

Try and get hold of the factory runners and plenum and try to find a good EFI tank

Get your carbs properly tuned, you'll spend WAY more going efi. You may find it's the engine performance killing the economy, ie. miss macthed heads, cam, carbs and exhaust combo.
I really believe it's purely the actual tuning where the problem is, a dyno will get the jetting but a GOOD hi-performance VW tuner will get your carbs right. You should be able to get even a stroked performance engine to deliver 10l/100 depending on variables like headwinds, ambient temp etc.

^^^^^^^

what Matt said,

too large or poor tuned carbys, too large exhaust, inefficient combustion chamber, low compression, weight, all are major contributors towards poor fuel economy, maybe try single centremount Progressive weber carb if all else fails.

Our 1800 twin carb stock bus got 10L/100km when tuned just right with a 2L box
When we went to EJ22 Suby, we got the best ever of 9.8L/100km. The biggest advantages were the modern engine and double the hp when required.

Thanks for the input guys.
My engine was rebuilt about 70k ago so it's all good. I always thought the 44's might gave been a but large. It does have a rather large exhaust too, heater boxes are gone with custom manifolds into a performance porsche 993 muffler.
The webers have been great I've never had a problem with them apart from the fuel consumption, they've been on there about 4 years.
The injection kit would cost me abut $2.5k. So maby better spent on a new exhaust, better ignition and some smaller carby's.
I have a set of 36idf's that are ready to go, but have been told they are too small?
Maby 40idf or 40 dells?

The 36s are fine, just need to be set up for VW if not already

I know guys that have triple 40's on 3.3 litre Holden 6 cylinder engines and they chew the petrol. Twin 40's on a 2.2 would be similar. I would think the twin 36's on a 2.0 litre if suitable for the cam and exhaust would be fine if jetted and tuned right.

Get electronic ignition if you don't have it already.

I am sure a good opinion for exhaust will come up.

You don't need to get rid if the 44s. Just fit smaller chokes and re-jet.

40's work fine on most 2l engines if choked correctly.

36's will out the box give good low end but run out of puff above 5k on a 2L. For those 'give it some stick moments'.

yep as per above you need the 40 or bigger for more torque

F I wont solve the problem as per above your pushing a BRICK through the air

the Vintage Speed 4 equal length headers into stock type muffler would work good as well

Oh yes, equal length headers are a must for best power and if able to get that in a 4-2-1 configuration then even better as the 4-2-1 will give better low and mid-range torque/power than a 4-1 exhaust.

The CSP Python is possibly the best out there due to it's equal length design.

Thanks for all the input guys
I've had a look around and for $700-$800 I can get a set of rebuilt 40 dells or webers.
As for injection the bolt on quad throttle kit was not real cos effective but I've done a bit more investigating and found if I get a megasquirt computer, sourse all the bits myself and get my mate to make me an intake with a single throttle body it will come in around the same as a new set of carbs. I even have a local guy to tune the megasquirt.
As for the exhaust I'm pretty sure I'll go with the vintage speed equal length pipes with the dual tip muffler.
I'll keep everyone posted on what I end up doing.

or you could delco it!