Injector and pump question
 

So I have a 99 z28 with a cam and bolt-on's that last made just shy of 400whp with a completely stock fuel system. When it was being dyno'd the tuner told me the injectors were at high 80's % duty cycle and I should look into upgrading the system. My question is, should I upgrade the pump, the injectors or both and what brand. I'm not sure what size of both I should buy. I plan on throwing a 100 shot on it soon so I would like it to be street able because that's what it is mostly used for with some track/spirited driving time. If it's possible I would like it to be safe up to about 600whp to be safe and it will be 93 octane as I don't have e85 readily available around here. Sorry for the long post but thanks for looking.

For 600rwhp a 255 intank pump is fine you can get several that will support that level. For injectors you will have to decied if you want the injectors to support that all that. If you do a wet kit you can run smaller injectors if you do dry or anything else the injectors need to support the 600rwhp.

I'd say do a racetronix 42lbs injectors... I just so happen to have a set... call/text me 262 483 9689

42 are good with a wet kit room to grow. Dry kit may not support much more than the 100 shot. You can use the injector calculator sticky to see what size injector you need. Fwiw I prefer the wet kit to dry but both have positives.