Fuel pressure and MAFT for 550cc injectors and big 16g

[eclipsek17]

I just got a new fuel setup, as I was running lean after upgrading to a evo 3 16g turbo. I just installed 550cc injectors, fpr, and 255 walbro. I was reading on some forums that a tune was needed and other things that said I would need a safc. I'm just trying to get a better understanding of what I need or if I can make what I have work good.

I have a MAFT and 3 1/2 MAF, and was wondering if I could just tune that to the 550cc injectors? Also I am really new to the MAFT still and am still having trouble figuring out what I am supposed to be reading on my data logger in order to fine tune my MAFT.

Also what pressure do I need the fuel system to be at?

Thank you for all your help in advance.

 

[91stocker]

What version of the maft do you have?

Here's a page with all the info on setting fuel pressure.
http://www.dsmtuners.com/forums/newbie-forum/402582-how-set-fuel-pressure-afpr.html

 

[eclipsek17]

Thank you for the link for the fuel pressure.

I have a 2.01 version MAFT.

 

[91stocker]

Here's their guide.
MAFT Version 2.0+ Tuning Guide - Full Throttle Speed Tech Support

Hope it helps.

 

[eclipsek17]

I've read that a few times. I know how to set the injectors on the MAFT, but am having trouble tuning it for base, mid, and wot.