I'm basically done with my build, but i was wondering what injectors and fuel pump do i need before i go to the tune shop? I'm hoping to hit 170-190 whp, right now its running on the stock injectors and fuel pump. I have a walbro 255 and dsm 450 blue top injectors on hand, but i'm not sure if my build would require that much fuel. Should i put on the 450 and 255 pump or is the stock stuff okay?

Build consist of:
B18c1 block
81 mm nippon p73 pistons
pr3 b16 head
blox type b cams
supertech valve springs
steel retainers
p73 itr intake manifold
4-1 header with 2.5 collector
yonaka catback

 

Stock is fine im making 200 WHP on stock ITR injectors and fuel pump you should be fine but if you have them and there good use them why not what else you gonna do with them.

 

RDX injectors would be a nice upgrade and net you a few more HP. Stock should work ok though.

 

stock jdm ITRs hit 190-200whp on stock injectors and fuel pump

 

At 100% duty cycle lol.

 

RDX injectors would be my choice. Reliable, cheap, proven.
I wouldn't try and push my stock (and probably old as Hell) injectors anywhere near 100 duty cycle for any length of time. 80% max is what I think the rule is.

Old *** injectors working their *** off?
Or new fresh improved injectors working at 50% all day long without a sweat.
For your HP goal, I think a stock vtec fuel pump be fine, but def not bigger than a 190.