Ok i am told that 550 primaries and 720 secondaries with a walbro will be good for running 12-14 psi on my turboed n/a project. However i can get some 1680's dirt cheap brand new. Will the safcII be able to tone them down enough to make me run right or will it be entirely too much?

 

You'll want a standalone with it to control 1680's. That's alot of fuel. That and you'll have to modify your fuel rail for them most likely.

 

I second that ^^^^^^^^

However, I believe you can get 1600 direct drop-ins from Marren. Although, you may need a resistor to match the OHMS, not sure.

 

No resistor needed for most standalones, which is what he will need to control them.

 

no way you can control it with the stock ECU/SAFC, that is just too much fuel and far too much of a gap to seam.