Which Size Injectors to get???

[BOOstGhost]

I'm buying the extreme psi DSM Fuel Management kit, it comes with APEXi Super AFC 2 with your choice of fuel injectors and fuel pump, i'm getting the walbro 255lph fuel pump and i was wondering what size injectors would be good for me... right now i'm running the 14b but i was planning on getting the EVOIII B16, i also am getting a the ExtremePSI Race Core kit 2 weeks after this... i'm ordering this right now and the 650cc, 680cc, 780cc are all the same price... so yea.... what should i get guys... thanks for the help.
Adam

 

[EvolvingGST]

Most people would probably suggest a 660 or so which would be sufficient for bigger turbos. But if you don't think you will go any higher you can choose 550s as long as you can get Octane 93 gas, they actually have a nice conversion chart at, RRE.

 

[BOOstGhost]

i only get 91 octane... should i get the 680's?

 

[rowlex]

I got 650's for my evoIII, but I also will be using an FPR/walbro 255, and DSMLink...

 

[EvolvingGST]

Yeah if you want to be able to boost high on the streets, and if you want this car for strait up racing I would get them, I say get them so you wont regret it and have to buy 660s 5 months from now.

http://www.roadraceengineering.com/eclfuel.htm

 

[BOOstGhost]

thanx guyz i appreciate the help... i love the dsm community

 

[doug]

The 680s flow about 650 at a 2G's base fuel pressure-- so on a 1G it would be even less without an AFPR.

 

[rowlex]

From what I have read (this is not experience), atleast for the 2G's is that is incorrect. All/Most import fuel injectors are tested at 43.5 psi(the standard and stock 2G fuel pressure(I believe 1G fuel pressure is 38 or 39 psi)) and rated anywhere from 80-90% duty cycle (depending on the injector).

 

[doug]

That's what I had read too, but I had to set my global fuel adjustment in DSMLink for 650s to get my fuel trims to zero out. Many others have reported similar experiences.

 

[rowlex]

That's what I had read too, but I had to set my global fuel adjustment in DSMLink for 650s to get my fuel trims to zero out. Many others have reported similar experiences.

Interesting, I will keep that in mind when I setup my DSMLINK & 650's. Thanks for the heads up