Ok folks, please excuse my basic fly by night question. Just would like to know what advantage is there by replacing the stock injectos with bigger ones like the Nismo 555 ? Is it simple plug and play ? Does the ECU need to be re-mapped or the timming re-adjusted ?

 

Last question, would bigger injectors on their own make bhp increase or is there other things I need to upgrade ?

 

 

Thanks !

you will need a remap for 555's, plenty of off the shelf chips available from guys on here.

 

it will only add power when youve got more airflow than the stock injectors can supply fuel for ie bigger tubs!

No BHP increase on their own, they allow you to run more boost.

ECU would need to be remapped to bigger injectors.

bigger injectors need the ecu remapped mate and only give bigger bhp with other mods such as bigger turbo,s , intercoolers ,etc, they would let you get the max out of your standard turbos, because standard injectors are only good for around 400bhp and stock turbos are up to a bit more than that if i remember correctly could be wrong on that one tho .

My mods so far on my Z are,

 

Blue Flame Exhausts

Apexi Induction Kit

FMIC

Unorthodox Pulley Set

Agressive ECU chip

ALC

Profrec B Spec 2 boost controller

 

 

Now, if I replaced stock injectors with the 555 and got a chip tp re-map, how much increase in bhp do you chaps think I might be able to get with stock turbos ? Will I feel the difference in power ? Finally is this going to kill my stock turbos quicker ?

stock tubs are only efficient upto 1 bar or so anyway. would make it safer as there would be less chance of it running lean at higher boost.

 

stock injectors & tubs do run out of puff at about the same time however

harder you push your tubby,s the shorter their lifespan sorry but honestly dont know what the max output for standard tubby,s is.

at approx 15psi stock injectors are at max duty cycle,so definatly a job if you pull the engine for bigger tubbies