Injectors.. What's too big?

[Duramax3000]

Just wondering what size injectors are too big to run with the stock cp3 and a good tune?

 

[JD4440]

No more than 40-45% over

 

[ridein dirty6.6]

im goin 2 do just tips my buddy got some an he loves them

 

[phale]

Tips are all you can do to a common rail injector. My vote is the same as JD4440. Unlike a cummins you don't really need a super huge set of nozzles to make power. 40% over will get you enough fuel to bend rods if you have the pump to push them.

 

[JD4440]

Mine are 45% over. I went from a 33oo PW to 215o I believe and picked up 20 something HP only adding those and a downpipe.

 

[trevorb_06]

I called Jim Bower at Extrude Hone (great guy to deal with) and sent him my nozzles this week he said 45% is a good number for the stock cp3 and would suggest not going over that