With more air you need more fuel, otherwise as you might already have guessed; the engine will run lean and possibly have a catastrophic detonation event. This is when you need to make sure you have the proper electronic suite to ensure proper monitoring of your system. Never push your setup beyond what it can handle. With that however you can ensure a long engine life and plenty of room to grow by employing and using the following:
- Larger Primary Injectors
- Larger Secondary Injectors
- Converting to a parallel fuel feed system
- Larger Capacity Fuel Pump
- After Market FPR (rising rate)
- Fuel Filter
- Fuel Pressure gage
That's about all you need. Now remember, you need to ensure you have enough fuel for the amount of pressure your new intake system will produce. Do not under bid on the fuel. I currently run a rising rate FPR and it's able to maintain if not exceed my needs to feed 550cc/min and 720cc/min injectors.
Realize that both a 550cc/min primary and secondary injectors is the bare minimum you will need to run stock levels of boost pressure or below. If you run any smaller you run the very likely risk of maxing out the injectors and running lean. Additional information can be found online about running injectors at max peak and hold for extended period of times.
Now there are alternate ways to net additional fuel, but they are more complicated than not and would probably be better suited for another discussion altogether.
As for fuel pump you can go with which ever one you feel will flow enough at the correct pressure. I currently am running an FD fuel pump as it's a direct replacement with little hassle at all to install. Others have installed Walboro's, Aeromotive, et al and have had success running those.
Conversion over to a Parallel fuel setup enables you to narrow down potential fuel problems. It also ensures that regardless of injector problems you will not have a problem that will cut fuel off to all fuel rails. (this of course is an extreme case: where one rail becomes clogged and unable to function--it may cost you an engine if it happens at the wrong time, but it's more likely that you'll spot the problem and be able to correct it without losing an engine) You can check out Ted's site about conversion. It's not hard to do at all.
While your messing with the system you may as well replace the fuel filter to ensure that you're pumping nice clean fuel into your engine. Just sayin'