I´m tired of the bad cranking that my car have when is warm , too much time to get started , my utec doesn´t have any solution to this problem , I have 550cc injectors with a 3.5 bar FPR.
I´m thinking in a reflash for my bigger injectors , but not sure if with a reflash could be possible to decrease the cranking times, to get a nice time to start my car when is warm , and doesn´t have all that black smoke after that....

I know that this is a tuning thread , but not much people reads the tuning sub-forum.

 

There was another thread started here on the FI forum for the same subject today:

https://my350z.com/forum/forced-induction/346383-reflashing-ecu-with-utec.html

 

are you sure your fuel pressure isnt too high. bad cranking when warm is a tell tale sign of high fuel pressure

 

My fuel press is good , exactly 3.5 bar when you start the engine.

But , in that thread , doesn´t have an answer to my question about cranking injector times.

 

Souds like the ECU /injectors are not scaled properly..Black smoke too rich...Excessive cranking time is likely due to the lack of 550 cc scaling...UTEC not involved in starting..

 

Yeap , the Utec isn´t involved in the injector cranking times , I need to decrease that times to solve my problem , because stock injectors are 290cc , now I have 550cc , so the cranking times would be around the half of the time ,to get a nice start up in warm.
This is the only issue with the Utec , the car runs perfect , and the black smoke is only after a warm start.Some guy will tell me...... if I reduce my fuel press , would get a better start up , but my injectors are around 90% of duty cycle at wot , if I reduce the fuel press to 3 bar , my injectors would be max out.
But , nobody knows if with a reflash for bigger injectors , the cranking injectors time is decreased