IV-Rotor Build: 12 plugs/ 9 bearings/ 8 ports = 1 monster by GtoRx7

2 minute(s) of a 43 minute read

3-9-2014

So its been a while since posting, but the car has finally been put on the dyno and laid down some prelim numbers. 

Did run into stupid issues, alternator decided to stop charging so battery voltage was 12.0v for all the tuning. Definitely hurt spark power. 

Fuel pumps were not keeping up with the injectors. Pressure was dropping after 7k

Individual rotor AFR were not the same. I didn't have the EGT's in each one to see it at the time.

Still it did us all very proud and put out 610rwhp@9700 and 365rwtq

Later in the day the highest I took it was 10,800 but the fuel pressure was so low it just killed the power output.

Pretty confident it will do 630-650rwhp once the issues are fixed 

So here are two charts overlapping each other. One is with the intake at the longest setting, the other on a shorter setting. I forgot to save the 610rwhp run but you can go see that video actually on our DefinedAutoworks Facebook page. 

I would have posted all this earlier, but tragically my Dad passed away unexpectedly from a heart attack two weeks ago. Never had a chance to give him a ride in the 4-rotor, but at least he heard it fire up once. My father was the person directly responsible for me going down the rotary path. One of the few factory trained rotary rebuilders for Mazda. He will be missed!! Ken Carswell 2-21-14