Tegheim - Home made 4 rotor Wolvo 142

[sa22c]

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.