APEXI safc Need Help

[DSM Chase]

I recently bought a 98 GSX with alot of mods done to it, the car has been sitting for over 2 years as the original owner moved out of state and left the car in a warehouse. The Apexi Safc(1st Gen) completely Reset itself (Zeroed Out). I have no idea really how to tune with it i do not have a datalogger. My father owns a 90 GSX mostly stock and he doesnt really understand it either. The Car has 880CC injectors, a 20G turbo, Big cams And a 3IN exhaust. What are some good start settings for it as far as lo and Hi? Also Can u set a rev limiter with the apexi the car is currently at 7500.

thanks

 

[BurrowZ]

Okay, first of all 880cc is WAY too big for an SAFC. The maximum injector size you can use is 660cc.

Second of all you need a wideband. You tune to air/fuel ratios according to that. A logger couldn't hurt anything.

Don't tune with it until you a wideband and new injectors.

Does it have a bigger fuel pump or any other supporting mods for the 20G turbo? You might need a bigger fuel pump and/or an AFPR.

 

[DSM Chase]

yea I figured those 880's Were WAAAY to big it runs Rich as all get out, and yes walboro 255

 

[DeathdealerATX]

I wouldn't even drive it until you get wideband, easy way to mess your engine up.

 

[BurrowZ]

yea I figured those 880's Were WAAAY to big it runs Rich as all get out, and yes walboro 255

I would get stock injectors. Hit up a junkyard and grab some. I would recommend cleaning them out a bit, that is going to be your cheapest option.

Does it have an AFPR since it has a 255 Walbro?

EDIT: and leave it zero'ed out if you get stock injectors. Also run low boost.