NRA T2

I'm looking to add a Walbro pump and 720 secondaries, do I also have to get a controler like a S-AFC, or can I survive w/out it, I've already gone to search for answers but no luck

rx74prez

You probably wanna get a S-AFC will that setup you are going to run hella rich. You are also going to need a EGT gauge and an Air/Fuel gauge to turn your car or if there is a dyno with a wideband, even better.
Chris

NRA T2

I have an A/F gauge, the secondaries only come on @ higher rpms so if I raised my boost to compensate for the extra fuel would that work or do I still need the s-afc, also do I even need the 720's to raise my boost if i have the s-afc and the walbro??

Ryde _Or_Die

First off an a/f ratio gauge just works off the stock O2 sensor and is pretty much a light show. EGT gauges are much more accurate but even better is a wideband o2 sensor.

Now to be safe fuel wise, I'd go with a walbro pump, fcd, s-afc and 720cc secondaries. That way you don't have to worry and have control over your fuel. Its really not worth going the cheap route or risking anything.