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Dear Friends

I recently got of a pair of Dellorto 36 DRLA Carbs (ex-Alfa Romeo). I want to fit them to the Type 4 engine of my 1973 412 Variant. The car currently runs on a pair of standard Solex carbs, but wear on the carbs's butterly axles have made a perfect synchronisation almost impossible = high fuel bills! I plan to modify Type 4 fuel injection manifolds (I've got a few to 'waste'!) to fit the Dellortos. Should I connect a balance pipe between the 4 ports, like that of the Solex setup? (The holes where the injectors were should be ideal for the pipe's fittings.)
What are the pros and cons of running the Dellorto 36 DRLAs on the standard 1700cc engine? I am not worried about high performance, I just want a reasonably economical daily runnner. Is it neccesary to fit a return fuel line from the second carb, like that of a fuel injected Type 4? Are there any restrictions on the fuel pressure, or is a FACET electrical pump OK? Will it be possible to configure the setup to fit under the limited space of the Variant's engine lid?
Am I asking too many stupid questions???

Regards
PINE

The setup will have to be with VERY short manifolds in order to make room for an airclener. One way to do it and at the same time compensate (as much as possible) for the short manifolds would be to keep the 90 degree intake stacks from the Alfa, and pehaps even use the center aircleaner housing from it. Have to say that I am not sure that there is room for it, but I think there should be.
No you do not need the return line on the 2. carb. just plug it, or better yet. Use the factory "T" for starters and route one hose to each carb. Then connect a hose directly from left to right carb. That way you are always sure of sufficient supply.
Yes the Facet will work. Just make sure its the model that pumps out 3 max 4 psi, and you will be fine. Otherwise you will need a pressure regulator.
Also install a pulse damper in the vacumline to the distributor or your vacum advance may get out of wack.
With dual carbs you do not need the balance tube, unless you have vacum brakes.

Torben

Hi my name is Gavin!
I have made manifolds to fit 36 + 40 Delorter carbs to my 412 with 3.1/2 Air filters. I've also done converting of type 4
engines into type 3 body's. I also do converting of type 4 engines!

If you would like more info please feel free
to contact me on 011 873 5054 or 072 241 3380 or galodewick@telkomsa.net

If you like the stock carbs...and they did run well...just a little complex.....just have the throttle shafts rebushed. Ray