I'm getting finished up on my 5.9 engine , and soon ready for install . Just waiting on the headers and tuner . I was going to just use the OEM injectors as they are rated above the application , but , after some research , I found this compelling video which kinda got me sold on a 4 hole injector upgrade .

Thoughts ?

 

Not sure you would notice much difference. Sure, the four-hole atomize the fuel a bit better, but, chrysler's idea was to fire the pencil beam of fuel at the back of the nice, toasty warm, intake valve. and it basically got flash-boiled......

Now, simply having NEW injectors, that had some semblance of flow balancing done on them, certainly wouldn't hurt. Regardless of how many holes they have.

 

The biggest restriction on these engines is the intake. Don't really have any problems with getting the fuel there. Just runs out of air real quick!

 

I seen this video on another forum. They show the spry pattern but no real data to back up their claim. Lets see some dyno results comparing the two on the same motor!

 

Who's paying for the dyno runs ? lol .

Intake is M1

Chrysler did a few things that needed improvements . My 32ft carb'd BBC motorhome gets 10mpg , truck is doing only 13mpg and no issues . It's too much !

I just did a little experiment . Using a spray bottle , I streamed gas , then misted it across an open flame . The mist was more powerful a bang it seemed to me . The spray didn't burn as fast and hit the floor before it was burnt .

After this , I think it's apparent there is something to this . I'll give my opinions after the install , yea , or nay .

 

Exactly. Liquid gasoline doesn't burn. Gasoline vapor, however, does. That's the whole idea behind any 'improvements' you get from better atomization from the injector. As I said before, dodge 'worked around' that issue, by using the back side of the hot intake valve to vaporize the gas. So, will you see any improvements with different injectors? I wouldn't hold my breath.

 

Don't some have issues after installing them? Hit or miss?

 

This comes from using "used" injectors .

 

I'm just hoping to make it as efficient as possible more than anything . Can`t hurt the MPG , that`s for sure . But , no worries , these will get a fair review . If I don`t think they are worth it , I`ll be the first to say so .

I appreciate your opinion ! , and others too !

 

Don't know where heyou reads this stuff at(cause we all know its not from working on his truck)b/c it is incorrect. V8 fuel injectors fire at 17.5 degrees AFTER top dead center (v8 mark on damper/FSM sync set)with the fuel sync at 0. the cam starts to open the intake valve 7-13 degrees BEFORE top center(5.9 pending year)thus the valve is near full open @ 17.5 ATDC. Near full open allows the intake charge to ram the mix into the chamber at a higher RPM. The reason for the stock injectors is at low RPM the intake velocity is low thus the pencil stream shoots/forces the un-atomized fuel into the chamber. With the magnum head design this is not very efficient way to introduce the fuel. What design are the mag heads? Any thoughts or ideas.