of course does injection have an influence on power.....
in practice, a injection car always has more power than a carburetted version. the reasons for this are economical as well as technical.
- a carb needs to be 1 unit, or you need to mount a number of them. Thats expensive, so in street cars like the B172k you are stuck with a single intake body, with divisions and curved channels to each cilinder. not ideal for maximum power...
- even if you would mount a separate carb and throttle valve per cilinder, tune it for ideal mixture settings, i.e. maximum power configuration, you would still have a certain blockage in the intake tract, being the venturi(s). A carburettor needs a venturi to suck up the petrol from the float chamber. To be able to do this, the venturi must put a certain drag on the air flow (much larger than, lets say, a air filter). if you look at a carburettor you will see that the venturi has a much smaller opening than all the rest of the intake tubing.
with an injection system, ideally electronic multipoint injection, there is no need for any obstruction other than the air filter. less restriction, a better cilinder filling (is that the correct term? guess not..), more powerrr.. A 360 has one of the older electronic injection systems; it still uses a air flow sensor wich also puts some obstruction on air flow (metering flap). more modern engines use a MAP or MAF sensor wich don't restrict airflow at all.
in practise, the advantages James pointed out are more important...
electric fuel pump => instant starting,
electronic regulation => much more precise
lambda regulation => "
more precision makes it possible to have optimum power or optimum economy. that depends on how the system is tuned..
