Largest injectors to use with S2 & SAFC Neo..?

[Louisvilleguy]

I have everything else that I need for my FP Green setup, with the exception of injectors. I am pretty set on picking up a set of DW 650's but know that I could possibly have some issues with running lean up top. I am just going to use a S2 pcm, 255 pump, Neo, and larger injector combo. I will just be running 93 octane pump gas and shooting for somewhere around 20-22 psi. Is there anything in between the 650' and 725's that I could run without a returnline and not have idling issues etc.? Or should I just stick to 650's?

Thanks in advance.

[Turbocruiser13]

Either one of those injectors mentioned should be fine. I run my 50 trim well into the 20s with less fuel pressure than stock with 650s and an safcI

[Louisvilleguy]

Do you use a static fp with your 650's, or is your fuel setup with a rising rate?

[Turbocruiser13]

Static...rising rate was too hard to tune for me and I didn't like the way the car felt with it on.

[Monster]

Your going to need a bottleneck fix up top or you will run lean past 5k. Cruiser knows this he has one he is just forgetting.

[Monster]

Quote: Originally Posted by Louisvilleguy

Do you use a static fp with your 650's, or is your fuel setup with a rising rate?

I have to use rising rate with my 650's because without the bottleneck it runs lean up top.

[Louisvilleguy]

I figured I would eventually need more things besides just injectors, but just want to keep it simple for now. I guess I could just start with 650's now and get what I can get out of them, then upgrade more later. The 725's sounded sweet, but I think that will be too much fuel to pull out down low. I am just looking to do 360-370 on pump gas right now so hopefully just the 650's and 255 will get me in the neighborhood... maybe?

[Turbocruiser13]

Hell mopar S2 injectors could get you that kinda power bud...the DW650s can see upper 400s with a returnline so you can go pretty far with them.

[slim26]

I will be running DW 750's with my BW S256.

[tusamni]

The 650's will be more than enough. Like cruiser said, s2/s3 injectors could get you there if you wanted.

[Louisvilleguy]

Thanks, for the input guys.

Have any of you guys done the fuel pump rewire? I was thinking of adding that to help up top possibly, but I am a little hesitant to add something that connects to my alternator.

[Turbocruiser13]

Never did it, and could care less to be honest. I have the 255, my own bottleneck fix, stock feed line, built my own "03 fuel rail" and built my own fuel returnline and the system works just fine on a 50 trim as well as a 57 trim both making mid 20's psi with zero issues.

[Louisvilleguy]

Nice. I am going to get myself a set of 650's and roll with it.