Quote:
Originally Posted by Cobrabill
Injection is injection.I don't care who's it is.Peak HP is determined by how efficient a air pump the engine is.Fuel delivery system is ALMOST irrelevant.
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You can flow a bunch more air down a pipe, at a given delta pressure, than you can air with 8% gasoline mixed with it. Fuel laden air does not flow well in a manifold. So at least in theory, an engine can pump much more air if you don't mix the fuel into the air right at the begining, like a carb or throttle body injection does. Ideally the fuel would go in via direct injection into the cylinder after the intake valve was closed.
By its very nature a carb has to create a low pressure zone to suck the fuel through the jets, creating a flow restriction. EFI does not have this problem.
Now the factory EFI stuff was designed for good emissions and low end torque. On Hp it does not compete with a carb. Most of the aftermarket stuff is patterned off the factory systems and still trying to meet emissions. It would not surprise me at all if an aftermarket EFI system, that was design from the ground up to make power and not care about emissions, made more power than a carb.