Hi all. I'm new here. I built a 1988 honda crx dirt track race car. The car has a DOHC ZC, L3 cable tranny, short ram, header, lightend flywheel, and 14" wheels. I have not raced this car yet but practice is next weekend. My question is the motor seems to run very rich and rpm needs to be about 2300 before I give it full throtle or it back fires. I am running a pm6 ecu. I also have a pm7 witch is what is supposed to run the ZC but the pm6 seems to work better. I do not have the o2 sensor hooked up and also no cat. Dose this sound normal? Also any tips to gain power would be great. The track is 3/8 mile so 2nd gear at red line pretty much the whole time.