Need tunning help

[RoaSted]

alright, trying to finish up my car. I gotta get it tuned and what do i use to tune it with? what is the best way to go about it? I have heard that i need a S-AFC but not really sure on all this tunning stuff... Still learning. Gonna be running bout 15-20 pounds. Walbro 255, 550 injectors. If ya need to information. Any help would be appreciated... thanks

 

[twenty5psi]

I think a Maft and gm mas would be a great starting out point for you to learn to tune with..I'd mention a Safc but they're not the easiest thing in the world to play around with if you don't know what you're doing..

 

[RoaSted]

well im not tunning the car myself. Im taking it to the dino and let them tune it for me. If i get the s-afc will that be enough to tune the car or do i need something else. My car is the 420a not the 4g63 so do i need to do anything with my ECU?

 

[16g-95gsx]

15-20psi on a 420a? Hope its built.

If you're running what you say you are going to, you likely will be able to get by with a 190lph no problem, get the 255lph if you want. 420a's dont use a MAS like we do, so the MAFT is out of the question. Try checking out the Non-turbo sections of the DSM boards, they generally will have more of an idea of what it takes to work with a 420a. Really it completely depends on the particular setup that you plan to go with. 15-20psi is an arbitrary number without knowing the temperature of the air to go along with it. 15-20psi on a T25 is not the same as 15-20psi on a 50trim, extremely different mass flow rate differences, and therefore completely different fueling demands. Like I said however I would start with the non turbo section of the boards, whether here or on DSMtalk.com, and get an idea from them on what it will take.

 

[twenty5psi]

I hadn't even noticed that it was a 420a..I'd also hope that your tuning is dead on precise while running that much boost if your motor isn't built..

 

[RoaSted]

Thanks man, my motor is built for this. I found a block for sale that had forged pistons,rings, new crank, etc... I have the hahn stage II on my 420a. its the big 16g turbo. Very nice kit ill check out the non turbo forums... if you can help me out anymore i would gladly appreciate it thanks guys
levi

 

[FWD98GST]

logger, egt gauge & afc...