cals400ex

iTrader: (27)

i recently had my car tuned with HP tuners. i have a fair share of mods for stock injectors. according to the wideband it is getting enough fuel. however, where should my duty cycle be at? i read that some peoples are 100 and others are 80 or so. i don't know what i am striving for? i have heard that the cars often make more power with higher duty cycles and i know they can be easier to tune if the injectors are not too big. any input would be great.

405HP_Z06

iTrader: (11)

Rule of thumb is not to exceed 80%. If your consistently over this threshold you need to look at larger injectors.

cals400ex

iTrader: (27)

what is the reason for this?

Magic Man

They work most accuratly between 20 to 85%.

ZL1Killa

iTrader: (17)

everything has an operating range.

www.rceng.com and click their technical link

FICINJECTORS

iTrader: (30)

above 85% the injector is spraying with the valve closed to keep up. 100% is static, meaning the injector is no longer pulsing, but staying open all the time.

cals400ex

iTrader: (27)

what is the disadvantage of the valve being closed or if it is no longer pulsing?

FICINJECTORS

iTrader: (30)

you are spraying fuel onto the back of the valve where it puddles, if its no longer pulsing then you have reached the max for that injector, and a lean condition is imminent.