This differs greatly from

high pressure
direct injection as that causes the fuel to atomize
well.
Some of the latest diesel injectors are up to
about 30,000 psi or above.

Peripheral porting generally improves the volumetric
efficiency
and consequently the power available 10 to 20%.

Does the power increase from P-porting assume high
pressure injectors are being used in conjunction with,
or can certain injector systems add even more to the
overall performance?

Tim Tracey

Injection in and of itself does not improve power.
What injection does is allow individual air intake runners
optimized for airflow alone with out regard for
carb considerations such as the required high velocity through
the carb ventures and possibly poor mixture distribution.
Injectors insure proper mixture distribution as one 
injector per runner is usually used.

Injection has nothing to do with p-ports. The two are independent.

Paul Lamar
 
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