Swirlpot

The fuel injection system will need a swirl pot. But where to put it in such a small car? After a first attempt to install everything in the boot, the rebuild allows for some other ideas. Starting with the purpose built bracket early this Sunday morning ...

... and the swirlpot mounted. Now the ideal spot for the high pressure fuel pump can be found and another steel bracket will be welded to the frame as this device is quite heavy.

A little bit of theory about the plumbing of a swirlpot in a fuel injection system from SBD. Modern fuel injected cars have the swirlpot integrated in the tank. In a car originally not equipped with EFI, a swirlpot has to be fitted separately to avoid fuel failure due to surge in fast corners.
Cheers.

Friends

Good friends for some time now, orbital sender, grinder, dust mask and scotch brite all helping me to get rid of the old chassis paint. Quite a lot of work with every rail having four sides, some very bristling Sicaflex and a lot of inaccessible spots. A few more hours to go and I can start painting.

The chassis being completely stripped, there are new opportunities to fix all the things. The swirl pot will now find it's place in the engine compartment near the injection fuel pump, the low pressure (or lift-) pump will remain near the tank.
Cheers.

Fuel system

 

One of the biggest changes (if not the biggest in all) when converting a car from carb to electronic fuel injection is the fuel system. Carbs have small inner 'tanks' with fuel, injectors don't. That's why the whole system runs under a higher pressure and with the help of a fuel swirl pot, there is always fuel available, even under hard cornering. Although the plumbing is not yet finished in this pic, the concept can be explained. From right to left: a low pressure pump gets the fuel from the tank, pumps it into the swirl pot (middle) where the high pressure pump (left) can get it and route it to the injectors. Excess fuel gets back to the swirl pot which makes a closed loop. If there is still too much fuel in the system (swirl pot), the overflow goes back into the tank. Well... it's not quite as easy as that, but you get the picture. Hope so.  

Cheers.