Hey guys, I've been following Aaroncakes na-t build list and just wanted to confirm some things before I full commit.

I'm running a stock s4 na engine/ecu/ect.

I'll be running an s4 ht18s-2s turbo on 7-8 psi.

The plan is to run a walbro 255 pump, 550cc injectors, and an safc to dial in fueling. I will be running a digital wideband to closely monitor afrs when tuning.

I'm curious if I need a fuel cut defender for an na or if they don't have the same boost related fuel cut issues as the turbo ii.

Also for timing I was thinking of pulling 2-3 degrees from stock timing just to be safe.

I know that a lot of you will recommend standalone but I'd really like to go the simple route as I honestly just want to turbo it for a tiny bit more power but am really after the sound and driving fun.

Thanks a ton!

 

I have some questions as I literally don’t know.

Will the na ecu be able to read positive boost pressure from the na boost pressure sensor? I’m not sure if the na boost pressure sensor is 1 bar or 2 bar, I know the t2 is 2 bar.

I might just be asking to ensure the electronic system will even be compatible with running boost, being able to run boost safely is another question.

There are existing threads about the na ecu having more aggressive timing maps, and not making additional adjustments after anything higher than 0 psi gauge, and other things.

 

You make a good point with the map sensor, I'm leaning more and more towards going megasquirt 3x instead. Especially considering the n/a timing map being more aggressive. Thanks for the input!