Thread: EFI injectors, what pressure?

Originally Posted by LOVEMYRANGIE

Really????

Jon has something else going on (wrong) in the background .... This is the 3.9 that he retro fitted into his "1988? RRC 3.5 flapper" ride .... I'm led to believe that he has calibrated the MAF and the TPS + checked the Ohm's of the ECU Temp sender unit

I wonder if he checked that the vacuum advance unit works??

Mike

Just orderd at set of the ford ms 19lber's (thanks for the link Mike)

Currently running 29lb bosch (Ex ford xr6 turbo) I used these because i had these lying around.

My cruise (aprox 50 to 60% load ) injectors open time is only aprox 2.5 to 2.8 milliseconds with these injectors at 75/80 psi. Max duty cycle is only 50 odd percent

Im banking on the smaller injector/longer duty allowing me to run longer injector duration and make it a bit easier for the wolf ecu to control.
The wolf runs peak/hold drivers and i don't think with the super short durations in currently running it ever get out of the peak band for the inj driver

I know it sounds pedantic but watching the afr float between 15 and 15.5 at cruise drives me nuts, but the change in injector duration is only .01/.02 milliseconds (IE SFA)

Luke