kenne bell boost and injector size question

[zepfloyd69]

i just finished reading this months article in MMFF and i saw that the testing on nitrous pete's car revealed that the stock injectors can be used for all boost levels on a kenne bell. i wanted to know why some people recomend changing the injectors to 55#s from the 38s when running over 13psi of boost. also in the article the air fuel ratio was at 10 to 1 even at 21psi and no other modifications. i just want to know what the issue is about changing the injectors with the added boost, is it a reliability issue or a tune issue etc. thanks for the help everyone

 

[GR8WHITE]

It wasn't an issue with the KB because they have a Boost-A-Pump supplied with the SC kit. This increases the voltage to the stock fuel pump under boost and causes it to pump more fuel. Most of the guys switching injectors are the ones using stock Eatons, stock fuel system and turning the boost up.