Need help with HP/Torque rating

[Markus]

Hello,
i´m confused what injectors to run. 24lbs or 30lbs?
I have no idea, what power level my new engine
will have. Please look my setup and give me an opinion.

331 stroker, 10.5 : 1 cr, AFR185, FTI cam (224/228 in/ex,
more lift on intake than exhaust for more low end torque),
comp cam pro magnum roller rockers, hooker long tubes, off road h-pipe, 2.5 inch dual exhaust with flowmaster 2 chamber, 73mm C&L MAF, 65mm TB, GT40 upper/lower,
255l/h fuel pump, FPR, K&N open air cleaner with cold air
induction, Mallory hifire ignition, stock A9L ECU, centerforce D/F and a tremec TKO, no AC, no PS, no EGR, no smog pump.
I have wideband from innovate with data log function but
i have the engine not installed yet and no injectors or sampling tube. I don´t want to buy the injectors twice.
My car i a 100 percent street car, no strip or race.

WHAT WILL THIS DING DO???
Thank you all for reading this!

Markus

 

[88Stang331]

I would say go with 30's or 36's. Don't want to starve your engine.

 

[jrichker]

The following examples are only for naturally aspirated engines.

Injector HP ratings: divide flow rating by.5 and multiply the result by the number of injectors. This uses a 100% duty cycle.
Example:
19/.5 = 38, 38 x 8 = 304
24/.5 = 48, 48 x 8 = 384
30/.5 = 60, 60 x 8 = 480

The preferred duty cycle is about 85% maximum, so for a safety factor mulitply the final figure times .85. (cheat on the math and use .588 instead of .5 and you don’t have to multiply the end result by .85)

Remember that the above ratings are at 39 PSI. Increasing the pressure will effectively increase the flow rating. Example: a 19 lb injector will flow 24 lbs at 63 PSI, and a 24 lb injector will flow 30 lbs at 63 PSI.

See http://users.erols.com/srweiss/ to get the calculators used in these examples.