Answer: The 12v supply must be ignition switched and you connect the negative side of your valve directly to Pin 33, the pin can draw up to 1amp. You must not use an external device such as a relay, it is too slow.

Answer: We never use the Bosch yellow injectors as used in the turbo engine. The reason for this is that any engines we have programmed use a larger injector as the standard injector appears to run out of flow fairly early on in tuning. We have heard of some companies using the Yellow on high output engines, but the tests we have made, show they are pushing the injector too close to its limit, which in our opinion means sometimes it would work ok, and other times it would supply fuel incorrectly, which is likely to cause damage

Answer: The standard XE injectors should just about cope with 0.5 bar of boost. Normally when we have programmed people’s turbo charged engines, we replace them with a higher flow injector. But since you are not looking for a lot of boost, the standard injector will just about cope but with no more. We would probably use a magnetti marelli injector, which is a 14ohm injector, which will cope with the kind of fueling you require. are a direct replacement with the original injector positions.