4 hole injector upgrade and more

I have seen several threads out here about those seemed they caused issues. Run some searches and read before you buy.

 

Ok then go to it. Post findings should be plug and play.

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The ECU tunes back the fuel rate so no real advantage unless your OEM are clogged

4 holes will have more volume less pressure and not as good a spray pattern, you would need to bump your fuel pressure up and dial in the ECU more aggressively.
I run OEM on the street with one of the higher HP 348s with great gas mileage

 

Not if they're the same flow rate as stock. if they're the same flow rate the holes are much smaller in the 4-hole and the atomization should be better.

sjd

 

The 4 holes have a higher flow rate then the 2
I must have 10 sets all sizes to play with plus a close friend owns RCrcuelinjection that gives me access to all the cool test equipment
bosch 2 hole is more then sufficient up to 320 rear hub HP on dyno tests

 

I assumed the 4 hole non Bosch ones were not scientific in that it's probably the same size holes as oem or a guess size so it would just dump fuel and run less than opimal. I am very skeptical on those myself.


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Cheap injectors are usually junk. So, besides not having the exact same flow characteristics as an original injector they could have poor balance or leak.

I would never personally run anything but an original injector on these cars unless you are changing the engine management as well. Even at that point, would not use the injectors you mention based on price alone.

 

The best thing to do IMO is just rebuild your stock injectors.

 

Be careful. I had issues with my car when I installed 4 hole injectors. It ran very rich.
https://www.ferrarichat.com/forum/index.php?posts/146239548/


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