The Question:
What injectors would run my setup well? And what fuel pressure would match those injectors?
THOUGHTS:
Currently I'm running the stock 240cc injectors from the original B16 i took the head from but fell like i need to go bigger to compensate for the 2.o block. I have 440 RC injectors lying around but think they are a bit too much. I've read that H22 280cc saturated injectors from a 97-01 prelude would work well and would be plug and play.

The setup:
CAR: 98 CIVIC EX COUPE
Head: stock B16 Pr3 , GSR cams, Type R intake manifold(after market)
Block: stock B20B low comp, upgraded ARP rod bolts and studs, ACL rod bearings,
ECU: P28 Chipped w/ b20v basemap.

 

The stock 240cc injectors would likely be just barely enough to run the engine... but the '97-01 Prelude 290cc injectors will give you a bit of safety margin. Do the 290's and tune the car.

 

Start with bumping the fuel pressure up to 4 Bar. Make sure your fuel pump wiring and the pump itself are up to the task.

The stock 240cc injectors are pretty close to their limit on a stock GS-R B18C. They are past the limit on a Type R B18C and that's why those run at 3.5 Bar.

If you go down the road of upgrading, any money spent on some other random injector is money wasted by not spending on a set of EV14s. You can find good quality sets for way less than $400, FIC 525's are their cheapest set @ $352 and are more injector than you'll ever need for a simple B-series NA setup, even if you decide to go E85.

 

What would be a good fuel pump upgrade for my NA setup I have rite now that would also work with low boosting it in the distant future and aiming for 300-400 hp? Would my RC 440s be to big for my NA setup?

 

Not even close... the 440's will run out at around 260 wheel HP on conventional fuel. You will need to go MUCH larger for 400 wheel HP... 750's would be barely enough and 1000's will give you a bit of wiggle room. I would get a set of 1000cc injectors.

 

I was referring to my NA step for the 440's. Ofcourse, I get that I would need larger injectors for a turbo setup. What size fuel pump would work with both setups?

 

Assuming gasoline - Anything in the typical 250-300lph range (Walbro 255, AEM green pump, etc.) will give you enough volume for 400bhp, with plenty of safety margin.

Make sure you buy from a reputable seller. It seems like an odd niche thing, but there are tons of knockoff pumps out there. These guys are in SoCal (Ventura) so shipping is quick for us west-coasters and their prices/service are good. I would buy from them again: Fuel Pumps │Automotive, Motorcycle, ATV, Powersports Performance and OEM Replacement (highflowfuel.com)

 

I totally forgot about that company. I actually purchased a pump from them last year for my bike.
So i know someone who is selling an AEM green fuel pump model# 50-1220 for a good price. I see that the AEM models #50-1200 is what people use for my 98 civic. Is there a difference between the 2? Some say both will fit, but I don't want to have to modify anything for it to fit. Anyone use the #50-1220 in their similar model civics ?

 

1220 is the compact body. You don't want that one.

 

I figured their was a significant difference between the 2. Thanks.