SAFC 2 and injectors

[nb07bcar]

What is the max injector u can run with a safc2. i have 42lb now and i'm around -40 but i want to upgrade and go to 50lb or even 72lb because there the same price. but i don't know if the safc will correct 72lbs. I thought I might turn the fuel pressure down a little? any ideas

[tigwebu]

72lbs is to much from my understanding, I think you can push no more that 555cc on stock ecu, so 50lbs your in the clear
Modified by tigwebu at 10:24 AM 2/20/2007

[eazye2000]

^ Agreed.The only way to control larger injectors than that, is to turn your fuel pressure down at idle. Or go with the 'Hacked MAF' idea. I wouldn't mess with either one of those options though....well....maybe

[Blown240sx]

IF your going to even mess with 720cc injectors why stick with a SAFC? I mean either go standalone or get a tuned Rom and tune it from there with the SAFC. Either way youll probably spend the close to the same money.

[S13FX]

Here write down some more info on what you are running, and your setup and I will try to list some of the tuning options you have.

[nb07bcar]

The reason I want to get 72lb for now is that they cost the same as 50lbs and I plant to upgrade in the future to some type of standalone. Right now I have 42lbs but at full boost I of 10-12 psi I run lean. so I need a little more. I've uped my fuel pressure but i'm at the limit. so I need new injectors.

[hannibal]

SAFC can only handle injectors twice as big as stock, so 50lb'ers or 555's are the biggest on the KA.

Time to upgrade to a tuned ECU in my opinion...

[WDRacing]

I ran 42lb injectors at 14 psi all day. I had to use a 255LPH pump though, the stock S14 pump couldn't keep up with the fuel demands at higher rpms and higher boost levels. Then I used alcohol injection to run 20 psi.

WD

[nb07bcar]

I don't know, but since i put the new T3/t4e on it runs lean at 12 psi with 42lbers. I also have a msd high pressure fuel pump. so its not my fuel pump. I guess i will have to just by 50lbs for now. thanks.