whats the max HP 440's will take?

 

at 10psi i'm making 326 to the wheels and they are just about maxed out.

 

whats your setup like,

 

mine maxed out(85%) at 265whp...si with drag kit and rebuilt bottom end...

 

B18c1
sleeved
eagle rods
arias pistons
stock head
T4 60-1
FMU 12:1 disk, 440's, missing link, 255lph pump, safc, 93 octane gas

 

weird how it varies so much.

 

Its all about the pressure, and the engines BSFC.

The more pressure the higher HP capacity.
(some people have seen over 400Hp with 440's)

The higher the engines BSFC, the less HP the injector can support.
(some engines could only get around 200HP out of 440's, because of their crappy BSFC)

 

usually hit 85% at 280-290whp. 95% around 320-330. but if you push them close to
100%, anything odd happens on the street and bye bye motor because you dont
have enough extra fuel to compensate

 

this is true, but when talking about increasing pressure you also increase the flow
rate. and that has to be taken into consideration

 

I've gotten about 390 out of them, but that was with FP spiking to 100psi.

keep bsfc to 0.6 is what I recommend for NA; about 0.8 for boost

hard to max 440 on na motor unless you have some sick race only 4 bangr running alky.

Greg

 

how about if I was to use a high flow fuel pump with the Rc 440's how much HP would they handle?

 

you calculate maximum power based upon flow rate at a given duty cycle, line pressure and BSFC. Fuel pump sizing is chosen based upon the line pressure and flow rate, therefore you don't figure out how muh power you can make on a given set of injectors based upon the pump.

Cheetah- .6 BSFC for an NA motor? That's ballparking a 12:1 a/f, seems a little high?



[Modified by texan, 1:35 PM 11/14/2002]

 

i think RC's injector worksheets demonstrate how all the conditions affect the injectors and the amount of power they support http://www.rceng.com/technical.htm