Fuel injector size help vortec v2 SC
 

What size fuel injector is recommended for this mod?
I know stock is 19lb.
Is 39lb appropriate?

What's your target crank hp?
https://www.deatschwerks.com/fuel-ca...tor-calculator

Also, you want your duty cycle to be a max of 80%. Anything higher than that and you could get fuel starvation (lean out). Anything less than that and you could run rich because the PCM won't compensate for it.