Hey im not sure what size injectors to run i got a hondats s200 coming a t04e turbo and im going to run about 10psi i was thinking 440's but would the 550's be better? and of course the fuel pump and an upgraded motor as well

 

what's your hp goal.?

 

if u got hondata you can use 880 cc bigger now than later

 

Here is a quick equation.

???cc injectors /5x4=???hp <===your injector will be @ 100% duty cycle
Assuming your fuel pressure is at 45psi. Increase it and you can run more hp.

550cc/5x4=440hp ==>100% duty cycle

Just a reference equation!

The next time if you want to have a idea of someone's max hp use this equation. If they even know how many cc injectors they have.

 

well i want to run about 300 here in alaska but i want get more when i leave here i was thinking 440 or 550?

 

a quick target equation for a honda turbo app with a very rich tune (11:1) is:
inj cc/2=whp
600cc/2=300whp dyno jet whp...
this leave a lot of room for leaning the tune down. H-t gave you the best case senerio, this is the worst case

 

550cc can work fine for over 400whp.

 

thanks everyone for the help i think 550 it is

 

http://www.rceng.com/technical.htm#WORKSHEET

thats the calculator i use.

 

rc's cal'or is very close based on what we see using a dynojet AND 91oct PUMP GAS.

52#injs (550cc) at 95% duty cycle (way higher than recommended) and with a bsfc of .55 (pretty much the besssssst case senerio for a turbo pump-gas engine) nets about 360 bhp. with a drivetrain loss of 16% (again, bessssst case senerio) you should see about 310WHP... hmmm.

redo the calc with more realistic numbers (85%DC, .65bsfc, and 18% drivetrain loss) and you get 272WHP... my quick cal'r says 275whp. pretty darn close maybe not what people WANT to hear, but who are we to argue with physics?

edit: using a rising rate fuel pressure regulator won't even get you to 400whp with pump gas and 550cc injectors according to rc and math...