I am still in doubt about which system, EFI or a dual quad tunnel ram set up, is better for a all out drag race motor Hence NHRA Pro Stock not going faster now with EFI than they did with dual carbs on a tunnel ram intakes
I remember several different mechanical fuel injector companies testing the location of the injectors heights in there all out race set ups for dirt and asphalt track roundy round all out race cars

If EFI is so much better(which I don't believe it is in every case)then why did Pro Stock slow down across the board. Plus there's some well known heads up racers I know that sold there's and went BACK to carbs and picked up LOTS of power......My opinion on the 2 places it shines, 1, on our daily drivers get to work stuff and 2, super high end high power(2000+hp)stuff but in between that carbs shine and I've been part of it personally...........

There's really no debate to be had on which technology atomises better. You've had at least two people who have worked in the industry say the same thing (Mr P Body and myself). Higher pressure gives better atomisation. EFI is ALWAYS higher pressure therefore, leaving the carb or injector, better atomisation, every time, period.

Per my original reply - what you do with it after that is getting a lot of good discussion here, but there's no uncertainty about which device atomises better.

But does that mean that it produces a better homogenized mixture?

I don't think anyone on this thread knows the answer to that question. That is a very complicated technical question and nobody would be able to prove it one way or the other without a lab full of equipment. A carb works opposite of injection so the behavior is totally different. In a carb the low pressure area in the venturi sucks the fuel out of the bowl. The pressure differential in a carb is only 5 or 6 psi while an injector operates around 50 psi. The metering block in a carb adds air bubbles to the fuel which helps. There is no air bubble system in an injector.

If someone really wants to know the answer to this question they would need to talk to an injector engineer at Bosch. My guess is that they know how to measure it and and could explain it.

Exactly. When I look down the throttle bores of a Sniper it drools big drops of fuel into the intake manifold just like a carb does. The injectors in a Sniper do not spray fuel into the intake which is what most people seem to be assuming.

Pro stock didn't just swap to EFI, they also got a 10,500 RPM limit, lost the scoop, and run a spec throttle body and intake tube.

Not to say that the carb still wouldn't make more power but I feel it would be MUCH closer or equal had they got to keep the tunnel rams.

Would be interesting to make a clear manifold and actually see the differences in fuel delivery between a Holley a Carter TQ/Rochestor Qjet and a Sniper.

Port injection, as used on sprint car engines generally have the nozzles entering the port from the exhaust side of the head, straight into the bowl.