injector size....?

[mygawd]

i wondering what size injectors i should get? i have a top mount turbo manifold. 57 trim turbo. FMIC etc. straight pipe. would stock gtr ones work or should i go bigger? greatly appriciated!!!

[r33_gtst]

All depends how much boost you are runnin and your power goals. Can you be a little more specific with the setup and intentions?

[92GTSTproject]

1cc=about 1hp so 440cc capable of 440 hp and so on if you want 500 hp dont get 800cc injectors get 550cc

[BrianV8]

^^^^^^^^^ Correct keep in mind that ratio is hp at the flywheel, Take what you want to make at the wheels add 20% and you should be close

[Bee-RSkyline]

^^^^^^^^^ Correct keep in mind that ratio is hp at the flywheel, Take what you want to make at the wheels add 20% and you should be close

+1

I am running 555cc injectors on a highly modified RB20

[BrianV8]

another thing to consider too is duty cycle. Once you figure out how many cc it takes to run your motor don't be afraid to go a bit bigger yet so you keep them around 80% duty cycle. My 25 is putting out 400whp i'm running 550CC injectors just over the 80% duty cycle mark.

Math break down 400whp + 20% to flywheel = 480cc + another 20% for duty cycle Puts me at 576cc. So My selection of 550 is close enough.

[92GTSTproject]

^^^^^^^^^^^^^^^^^^
agreed dont need to over work an injector thats to small to make the power