5.0 engine upgrades

[89mustangowner]

I was wondering would I bennifit from upping the injector size from stock to 25lb and changed the throttle body to a 75mm on a stock engine. I know I would have to revamp the computer with a chip. Would this work or would I have to change the cam and bore the cylinders?

 

[KamiKaziDK]

that would do absolutely nothing at all for you, you don't need to upgrade injectors until after about 300hp at the rear wheels

 

[Dino Dino Bambino]

I was wondering would I bennifit from upping the injector size from stock to 25lb and changed the throttle body to a 75mm on a stock engine. I know I would have to revamp the computer with a chip. Would this work or would I have to change the cam and bore the cylinders?

You're a long way from needing bigger injectors and a larger TB. You'll need to do a long list of simpler bolt-on mods as shown on Horsepower Gains before you reach that stage.
Stock 19lb injectors with stock fuel pressure will work fine up to about 235-240rwhp. You can still use them up to about 280rwhp but with the fuel pressure raised by an adjustable regulator. Thereafter you'd definitely need bigger injectors with a MAF that's calibrated for them.