lol i posted that calculator a few posts above yours in this thread homie

 

Also check out www.turborx7.com has some good info and charts on stock and aftermarket injector fuel rates and fuel pump info.

 

Max Cooper has a good fuel calculator also.

 

403rwhp was at 7200rpm and sweep all the way till redline. Eventhough, it stayed at 100% at 6500rpm, fuel requirement is less after peak torque so there were plenty of margin in this particular application. I ran the car that way for over a year before upgrading the secondary injectors in 98. It never had any problems backed in the day.

 

The one I was thinking of was different and not rotary specific. It has a few more variables that you would enter. I did check out the calculator that you posted though.

 

That's the one I was referring to. Thanks Eggie.

 

Perhaps I just don't understand. It seems to me that 100% injector duty at 6500 rpm means you cannot produce more fuel at that boost level. Higher rpm requires more fuel unless boost drops off, or the the mixture becomes leaner. If boost drops off, rwhp should diminish. If I have missed something, please explain.

 

The engine requires less fuel above 6500 rpm because it requires less air, or rather can intake less air at WOT per revolution because its volumetric efficiency is going down, it also can and should be tuned leaner above this point because you can, so too not do this would be wasting fuel.

These too effects combine to overshadow the increase in injector frequency with added RPM.

 

Thank you for the explanation. I'm not saying I don't believe you, but I am a sceptic. Anyone else agree with this?

 

Peak torque on are cars usually is around about 6500 rpm so thats when the load on the engine would be highest requiring the most fuel. I think most logs show that the inj duty cycle peaks around 6500 and then drops off after. Hp will keep increasing though because of the RPM multiplier.