Hey h/t. I just finished putting my motor together and i was wondering what size injectors would be right for my set up. The motor is a gsr built with:

LS crank / Shotpeened LS rods/ arp rod bolts
p30 pistons
crower stage 2 3/4 race cams
supertech valve train
skunk2 intake manifold
blox 68mm throttle body
hytech replica header
2.5 exhaust no cat

chipped p72 (tuned with crome pro).
I was able to get my hands on RC 370 cc injectors but someone told me to go with 440's. i personally thought 440's would be too big. all opinions would be greatly appreciated.

 

just use the 370s you have they'll work fine

 

I agree.
I am running 370's now. NO issues or trouble.

 

seeing as how 370's can support well over 230hp why is there even a question here? I highly doubt your build will make that much

 

If you are tuning it just use the stock injectors they are good till about 200hp which you won't quite make.