as many of you know there are at least 2 hp calculators readily available to rotary owners... max cooper and rx7.com ari yellen's site.

both ask you to enter your injector sizing and injector duty cycle and will calculate your rwhp.

i have fiddled with this a bit and corrected my afrs to my target (they weren't far off) and also corrected the hp for SAE std temp/pressure/humidity.

most of my calculated hp readings seem to be about right except for the 2000 to 3000 rpm area where they are high compared to most other rotary results.

for instance, running 850 and 1600s i get:

2000 rpm 17.9 inj duty cycle
2400 27.1
2800 36.7
3200 37.7
3600 44.5
6800 74.6 at 10.1 psi

boost turns pos at 2800

as i mentioned, the lower rpm numbers may be off. i am wondering if anyone has any answers.

thanks,

howard coleman

 

Not sure how accurate the injector duty cycles would be. But a few of us had tried to use the gear ratios, weight of the car, and logs of time vs speed to derive acceleration and thus power. That should work in theory. Think we all just lost interest in it.......