[project89]

not if the fp is right,and the only issue may be idle tunning if the injectors are to large u cant get the pulse width low enough.

if the injectors are to oversized u wont be able to open and close them fast enough,basically u will just crack them open resulting in poor idle and very hard tunability

an lt1 needs a 50# injector open 9.2 msec for 100% ve at wot add in the 1.1 msec opening timeand u have a 10.3 msec pulse width
thats without any enrichment running a 14.7 afr
now for 12.0 afr that would be closer to 12.3 msec or about 42% duty cycle on the na motor

bring that down to idle and ur looking around a 1.5 msec pw at idle + the 1.1msec opening time plenty of time to allow for idle tunning even though it is a lil on the low side by about .7 msec

idle pw shoudl be around 2.3 msec without opening time for ease of tunning the mixture,with low pw time the only thing that happens is an enrichment in the ve bin becomes exaggerated a 1% increase in the table could actually become a 4% increase in injector flow or decrease depending on which way ur going

but at idle ur already dropping fp when vacum is aplied to the regulator as long as u have an adjustable fpr its fine u can just take out an additional 1-3 psi of fp at idle

but 50's are well within the range of being tunable at idle something like say a 60 or 70 pound injector would make for hell trying to tune at idle with ultra short pulse widths