you feel comfortable telling people they can run up to 190's on a stock fuel pump safely?
If you go back is said"
The factory fuel pump can support injectors up to around 190cc's. If you plan on upgrading your injectors, it is strongly recommended that you have a fuel pressure gauge to monitor the fuel pressure. (Keep in mind that not all injectors flow the same. So, two different companies 190’s may actually flow quite a bit different.)
If you are seeing the pressure drop, then upgrading your fuel pump is recommended.
"
Key words/points:
Around 190cc
strongly recommended that you have a fuel pressure gauge
Not all injectors flow the same
if you are seeing the pressure drop, upgrade your fuel pump
Even in your follow up question
seriously?!?! maybe some II 190's but elite,cass or RCD I HIGHLY doubt.
You say that II’s injectors may work with a factory fuel pump. So, by that, follow up question, you are agreeing with the above statement that there may be possibilities of the factory fuel pump supporting larger injectors.
So, to answer your question:
Yes I feel comfortable telling people they can run up to 190's on a stock fuel pump safely if they have a gauge to monitor their fuel pressure.
Would it be better to run a FASS or AirDog, probably. Is that a bad idea, no. Do they have to, not necessarly it all depends on their fuel pressure. Realize that by upgrading the fuel pump and not the lines, 60 psi from a factory fuel pump is the same as 60 psi out of an AirDog or FASS. You could argue the air separation but that’s another issue that we are not discussing. Do I recommend our fuel pump/system, NO. Especially not with only 190’s.