Need advice from fuel injector experts

[Hohn]

If anyone has an opinion on how these spark plugs look don't hesitate to chime in. To me they look good but I might be wrong, I don't have much knowledge when it come to reading plugs.

Dang near pristine IMO. Definitely consider a more modern fine-wire electrode design if you can find them in a fitment for that car. Modern plugs are so much better that they can breathe new life into tired old ignition systems by being easier to light and having more consistent ignition.

I'm partial to NGK and Denso plugs. Watch for counterfeits, which are big problem.

 

[Hohn]

I don't know that much about gasoline injector compared to diesel injectors (which are within my sphere of professional competency).

But I can suggest that spray plume is quite significant as a factor for ethanol and similar fuels because these fuels don't vaporize very well. Incorrect spray angles or plumes can create "Wall wetting" and pretty inefficient combustion with poor mixing. At least, this is true primarily at low loads and temps.

At high loads and temps, you have both higher intake port temps as well as much higher velocity-- both are directionally quite helpful for mixing and vaporization. THe downside of course is that you often have less time to do so because of higher RPM. SO there's a tension there.

 

[Mainia]

Dang near pristine IMO. Definitely consider a more modern fine-wire electrode design if you can find them in a fitment for that car. Modern plugs are so much better that they can breathe new life into tired old ignition systems by being easier to light and having more consistent ignition.

I'm partial to NGK and Denso plugs. Watch for counterfeits, which are big problem.

Don't discount HKS racing plugs (custom made NGK) as they have "universal" plugs to fit non specified car brands/engines. Tuners have done the homework. Take my car, uses the new ruthenium race plugs that have been approved by most Hyundai/Kia tuners as one of the best plugs to use in the 1.6T and 2.0T motors. The ruthenium plug runs so much better then the old HKS iridium plugs.