I have a Apex SAFC. and i have upgrade my secondry injector to 1200cc from RC engineering. I have dyno tune the SAFC before with the stock injector and it works very good, but now i put the 1200cc injector, When i drive it up to 3000 rpm the car seem like slower, no power and i can hear the fuel injecting. Does any one knows how to tune it and what the setting is?

 

Dude why are you using 1200 cc. The AFC will correct fuel on a percentage over stock...SO unless you have a chip for injectors that flow like 1,000 cc ....You have way too much fuel. ABout the biggest you can go with a stock computer and an AFC is like 850. Unless you have a realy big turbo and intercooler. Hence why the car bogs and really hesitates. More fuel is only good when you can burn it. You need more alot more air, or go get you some nitrous!

 

I have a Front mouth intercooler, and i will upgrade my turbo soon.