I was running 1200cc secondaries and stock 550cc primaries. I just got a nippon denso pump. I dont know what the right question here is but at what point do I have to move onto bigger injectors. Will a FPR help the injectors?
Is 200cc that much of a difference? Can i run maps for 1300cc injectors?
Am I all over the place or what? lol

 

you probably want to keep them under a 70% duty cycle at any given time ... just have a go with this Fuel Injector Calculator and keep plugging in the number you want/need.

 

That calculator doesn't take in to consideration the fuel system pressure. If you keep the injectors at the same duty cycle and raise the pressure, you will make them inject more fuel.

Try this calculator.
http://www.rceng.com/technical.htm#WORKSHEET

 

cool!
never knew that!

 

I made a calculator that lets you play with pretty much all the relevant variables:
http://maxcooper.com/rx7/how-to/fuel_system/calcs.html

-Max

 

make one for fcs max..please

 

Mine works for everything (even V16s with two sets of additional injectors!) -- you just have to type in the right numbers. I don't know the right numbers for the FC, so I didn't put them in the drop-lists.

Here's my guesses for FC turbos (series 4):
BSFC: 0.64
FP: 38
Inj: 4x550
Max Duty: 60%

-Max

 

thanks. gonna have to look that up.