Rotary Car Club - View Single Post - Tegheim

sa22c · 06-16-2012, 05:19 AM

Hi,

I have a few things to input into your build.

#1 Use LDR rotor recess rather than MDR. LDR requires less fuel to idle and makes more power. The only disadvantage of LDR is that it promotes higher combustion temperature and thus increased NOx emissions which is why Mazda stopped using LDR in 1985.

[EDIT] If you make your engine side ported how are you going to deal with rotor 2 and 3 having different port area to rotors 1 and 2. Sure you can port the timing angles to all match but the runners will be considerably different.

06-16-2012, 05:19 AM	#1
sa22c The Newbie Join Date: Jan 2012 Posts: 21 Rep Power: 0	Hi, I have a few things to input into your build. #1 Use LDR rotor recess rather than MDR. LDR requires less fuel to idle and makes more power. The only disadvantage of LDR is that it promotes higher combustion temperature and thus increased NOx emissions which is why Mazda stopped using LDR in 1985. [EDIT] If you make your engine side ported how are you going to deal with rotor 2 and 3 having different port area to rotors 1 and 2. Sure you can port the timing angles to all match but the runners will be considerably different. Last edited by sa22c; 06-16-2012 at 05:23 AM.