injector equation??

[struckinc]

is there an equation that i can use to determine what size injectors i am going to need for my new engine? i am not sure how to figure that out. or if someone knows already that would help too. i am working on a na/ka that will have about 280-300hp at the crank. not sure which injectors will be best for that application. also what kind of fpr should i go with? thanks

[PencilShavings]

s15 sr injectors would get you there (480cc)

how do you plan on getting ~300hp with a na ka?

[let5l1de]

try the http://www.rceng.com/technical.htm. they have a cool calculator to get you in the general area.

here is a equation from their site:



btw: the s15 480cc injectors should be ok @ .8 duty cycle. im sure you have a fuel system in place to deliver the higher flow rate. almost all engines hate to run lean....