I was running 460cc injectors but one got plugged up so I got a good deal on some rc440 injectors.. Am I going to have to get a re tune or will it not make much of a difference?? Does it matter what the fuel pressure reg is set on?

 

it will need to be cleaned up unless you were on the rich side. If you have a wideband in the car you can monitor the a/f ratios youll know if it needs more fuel or not.

 

Set fuel pressure to the same, remove 4-5% of fuel across the board, then monitor AFR.

 

He's going down in size not up.

 

Then add 4-5% lol